Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. Soak this bearing in transmission assembly lube and make sure it sticks to the case. But opting out of some of these cookies may affect your browsing experience. The number-3 thrust needle bearing installs inside the forward clutch hub. Unless your vehicle has a sealed transmission, you will be able to pull out the dipstick and read the levels. Install the intermediate clutch servo piston in the front pump. The uid color should be reddish-pink. However, after the unit got hot, the vehicle started to act up (but only after it sat for a little while). The uid pressure is the same as second gear in drive range. The bottom line is, its important to know how the system works. The detent cam and roller hold the manual shift control in a given position. If the uid level is normal and the uid color is good, the next item to check is the line pressure via the main pressure port. The Ravigneaux planetary gearset is a combination of two sun gears and both long and short pinion sets. These cookies ensure basic functionalities and security features of the website, anonymously. It has three alignment holes (slots). This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. Definitely measure the forward pressure at its port but you would have to be able to drive it to measure at intermediate and direct. If you encounter any binding, chase the threads and remove the debris. Apply uniform pressure to the piston while feeling for a smooth transition. Once you have the converter seated it is Pay close attention to the seal status. Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. Rock these assemblies back and forth until the forward clutch is completely seated in the reverse clutch drum. WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. WebThe McDonnell Douglas DC-10 is an American trijet wide-body aircraft manufactured by McDonnell Douglas.The DC-10 was intended to succeed the DC-8 for long-range flights. Should either or both of these speed sensors fail, you may notice one or more of the following 3 issues: 1. Privacy Policy. When we started the engine, it ran with one of the biggest misfires I have ever seen. The bolt torque is 62 to 88 in-lbs. Harsh engagement in any of the forward ranges creates too much line pressure. The transmission must be removed to check torque converter function. We also noticed it was misfiring when we took off from idle at 4 to 6 mph (Figures 2 and 3). Cant get reverse gear? The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. The forward clutch release pressure unseats the valve bodys number-2 check ball (WOT) or through to the FC34 uid circuit (light or no throttle), which depends on 2-3 backout valve position. The gear ratios of the 4R70W transmission are: First gear: 2.84 Second gear: 1.55 Third gear: 1:1 Fourth gear: 0.70 The respective gear ratios of the AOD are: 1st Continue stacking until you reach the pressure plate, then check clearances. Yes, valve body was removed and Sonnax Sure Cure kit was installed. Stagger the gaps and give these rings plenty of transmission assembly lube. Servo apply pressure is controlled by the low servo modulator valve. Online Buyer's Guide When line pressure is terminated, this spring returns the servo piston to rest. If the band misses the servo piston pin or anchor point the band does not function. If this cannot be achieved, go with the appropriate retaining ring: .060 to .064, .074 to .078, .088 to .092, or .102 to .106 inch. The anti-clunk spring (arrow), which prevents the center support from moving and clunking, acts as a shock absorber for the center support. Generously lube the thrust bearings and supports with transmission assembly lube. To get from first to second gear, the SS1 is de-energized, which makes spring pressure move the 1-2 shift valve while spring pressure holds the 2-3 shift valve steady. Subscribe Now You get high line pressure when the throttle is wide open and manifold vacuum is low under hard acceleration. According to ASTG all your line pressures are fine. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. This was a hydraulic transmission with throttle cable and governor.. 1993: (half year, Depending on month produced you could have hydraulic or computer controlled ford transmission) they The TCI Automotive rebuild kit includes iron sealing rings and Teflon seals for improved sealing. Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. The 4R70W, a Ford transmission, is an evolution to the popular AODE and is often used interchangeably. An AODE/4R70W not going into gear could mean problems with the forward clutch piston sealing and check balls. Is there any tests I can do without pulling the trans first? Spring pressure here determines shift firmness. Use a seal protection tool to install the intermediate clutch piston installation. This cover contains line pressure at the 1-2 shift accumulator. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. If you liked this article you will LOVE the full book. Work the sun gear drive shell back and forth to seat. The valve body is responsible for controlling the flow of fluid S1. Is it a noise or vibration? What is the engine idle speed? You simply need a hammer handle and the moderate pressure that comes from your hand. Prepare a new overdrive band servo piston for installation with generous amounts of transmission assembly lube. Change Your Address, Yes, I would like to receive emails from Gears Magazine. The 4R70W transmission tends to slip on the 1st gen Ford Crown Vic. Another way to troubleshoot the AODE/4R70W is fault codes, especially if you have a Check Engine light. With all clutches and steels installed and clearances checked (.060.091 inch), install the snap ring. Closely inspect all hard parts for scoring and cracking. A Look at Common Failures and Fixes, Seems Fuzzy To Me! It also means theres no pressure to the intermediate clutch pack. They should rattle when you shake the clutch and shaft assembly. 1. Did you remove the valve body when you fixed your other problem? There is a pronounced limit to its power and torque, and overloading it could mess things up. The planetary one-way clutch overruns. Written by George Reid and Posted with Permission of CarTechBooks. The 1-2 shift valve remains as is. 132 N. Howard St, Akron, OH 44308 This is the Manual Lever Position Sensor (MLPS), which is tied to the manual shifter. Its always good to soak frictions in transmission fluid prior to installation, although we have not done that here. This shaft operates inside the outer stub shaft. With this sequence of events, pressure goes to the forward clutch pack through the orifice control valve and the 2-3 backout valve. 4R70W tcc lock up in 1st gear. All others 50-75 psi. This is the forward clutch with input shaft. Harsh or Improper Shifting Without a valid speed signal from these sensors, the PCM will not be able to correctly control Others install them wet. Slowly walk the tool around, protecting the seal lip. Analytical cookies are used to understand how visitors interact with the website. Check for proper spring alignment and positioning. Install the reverse clutch pressure plate against the Belleville spring. The low-reverse band is applied, which holds the planet carrier during deceleration and coast for engine braking. The drivers side has the manual shift linkage. Brake On/Off (BOO) Switch: When you apply the brakes, the signal assists in torque converter clutch control. It could be EPC or MAF sensor failure to a leak to the 3rd clutch. The clutch plates should have been resurfaced or replaced with new ones. 1. The SS1 stays on, keeping the transmission in first gear. In second gear in manual range, both the SS1 and SS2 are off. Yet another issue could be the low-reverse one-way clutch. Ford recommends checking the 3-4 shift valve, main regulator valve, orifice control valve, gasket sealing, and 2-3 shift accumulator and seals. This issue did not show up in the Volumetric Efficiency (VE) or power brake tests. How did the forward clutch drum look? Ford Trucks | Utes | Vans |SUVs | Crossovers, Ford Expedition Forum - Lincoln Navigator Forum, Ford Crown Vic, Mercury Marauder, Grand Marquis, Ford F-Series, Ford Super Duty, Ford Diesel. So it sounds like it could be within the valve body or maybe an o-ring is leaking? My 4R70W transmission is giving me trouble. Troubleshooting the AODE/ 4R70W begins with ascertaining the problem. This TCI Automotive transmission overhaul kit has just about everything needed to complete an AODE/4R70W rebuild. Pressure all by itself doesnt move the 3-4 upshift valve. All of these items are checked by dropping the valve body and visually inspecting them. It was And by the time the price of oil rose about 400 percent, fuel-efficient vehicles had become crucial. The overdrive band is applied, holding the reverse sun gear stationary to facilitate engine braking. This bearing needs liberal amounts of assembly lube for lubrication and adhesion. This cookie is set by GDPR Cookie Consent plugin. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up the various components. When we dropped the pan it was full of metal, as expected. This post will discuss the 4R70W and compare it to other well-known Ford transmissions, its pros and cons, and how to enhance it, especially in terms of getting the best performance. The AOD full-throttle shift-point with the Motorsport wide-ratio gear-set is different. Begin the pump inspection by verifying the bolts are torqued correctly and the stator support is secure. Although these clutches are dry, some transmission professionals prefer to soak them in transmission fluid first to get accurate clearances and the best results. Sometimes the MAF sensor causes transmission problems. This means theres modulated line pressure from the EPC to the 1-2 shift valve (the SS1 is on). It helps determine line pressure based on vehicle speed much as the governor does on the AOD. Each transmission build shop has its own approach to assembly. The gaskets and seals are also potential leak and pressure-loss points. Installing them wet gives them a good start against freshly resurfaced clutch drums. Seals and thrusts should be installed wet with transmission assembly lube, though not all shops do it this way. The 2-3 shift valve moves under pressure against spring pressure. Park gives the same result but also engages the parking pawl. There are four grooves but just three sealing rings. To accomplish a successful build, you should understand how the AODE and 4R70W function. Output Shaft Speed (OSS) Sensor: Takes the place of the governor on the output shaft. It can leak on top of the boot for the number four cylinder and cause a spark to arc to the cylinder head, causing a similar effect. Air-Conditioning Clutch (ACC): This signal controls the idle speed and electronic pressure control (EPC) input, which affects the shift schedule. If these seal ends overlap, you get internal leakage. Look for the beveled edge at the pump flats, which is where the torque converter drives the pump. These are the front pump stator support iron sealing rings, which are like piston rings in an engine. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. Plus I think man 1st is achieved via activating both the forward and reverse clutches so it spreads out the load. In other words, are the two pump halves securely tightened? During installation, watch the seals and protect them from distortion. Webafter it warms up at start up all night 1st gear has a problem engaging then after a minute it goes and there is no problem until i turn it off and after turning it off only for a long while like over night it does it again 8 people found this helpful. The intermediate one-way clutch keeps the reverse clutch drum, shell, and reverse sun gear from rotating counterclockwise when power is being applied (acceleration). The MCCC again gets pulses from the PCM tied to driving conditions. Ring thicknesses are .060 to .064, .074 to .078, .086 to .092, and .102 to .106 inch. WebThe 4R70W/4R75W transmission is susceptible to issues that include: loss of forward gears, intermediate clutch failure, loss of second gear, delayed reverse or shudder in reverse, No cracks or chips and the snap ring land had no cracks. The AODE/4R70W front pump is high-efficiency aluminum rather than iron. The cookie is used to store the user consent for the cookies in the category "Other. The manual shift linkage and manual valve line up like this. Legal/Privacy. 1998 and later 4R70Ws can handle up to 500 HP with Roller clutches should always be replaced; consider it good life insurance. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. Electronic Pressure Control (EPC) Solenoid: Your AODE/4R70Ws pace-maker. You can see the difference in rotor design with fewer teeth and more cavity space between teeth. Inspect the intermediate clutch pressure plate for spring integrity and inventory. TIPM Problems! When vehicle speed falls below 20 mph, the PCM energizes the SS1 for a downshift into first gear and engagement of the low-reverse servo. Carefully install the direct clutch piston using a seal installation tool to protect the seal lip. Mark helpful 40 (7 points) A car traveling on a flat (unbanked), circular track of radius R accelerates The top clutch plate should be your plate. Click the button below and we will send you an exclusive deal on this book. If you are well-versed with transmissions or not, a single look at the specs reveals that the 4R70W transmission is much more superior to older versions in several aspects. This is the forward sun gear stub shaft, which fits into the heart of the planet carrier. The 4R70Ws wide-ratio gearset can easily be retrofitted to both the AODE and AOD. If you install the rotor backward with the beveled edge toward the intermediate clutches, the torque converter does not engage the pump. Subscribe. Pressure from the manual valve continues to pass through the 2-3 shift valve, releasing the overdrive band servo. Reverse; 80-120 psi. Staggering the gaps helps the sealing rings hold pressure. The RDI was ordered and taken to the bench for disassembly. Recently, I did some research at my friend Rodgers shop in Miami, FL. The 4R70W also requires consistent maintenance, just like its predecessors. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. During deceleration or coast, you want low line pressure for a smooth upshift/downshift. Also, did you use seal protectors to install the pistons? The AODE/4R70W is a 4-speed, rear-drive automatic overdrive with electronic control, hence the AODE designation. Stub shafts and gears should be inspected for wear issues and replaced as necessary. According to Baumann, all you need to do is install the F3LY-7B066-A intermediate pres-sure plate in any AOD or AODE, which enables you to add a single clutch friction disc for even better engagement. It was not on the floor, so we figured the head gaskets were to blame. The difference is the SS1 function. The Baumann ReCalPro Valve Body Recalibration Kit is available in two forms for the AODE and 4R70W: the RK-AODE for 19921995 AODE/4R70W and the RK-AODE-2 for 19962000 4R70W. The AOD efficiently replaced several older transmissions that Ford put out, including the C4, C5, and FMX. Lay the clutch discs and plates into the reverse clutch drum. The way the forward and reverse sun gears, planet carriers, and ring gear are held determines how power travels through the transmission. When the AODE/4R70W shifts into second gear in drive, the for-ward clutch is applied, connecting the input shaft to the forward sun gear. Early 1999 4x4 w/ 215,000 and auto (4R100). It sounds like the clutches are going. Every time the engine was restarted after a warm soak, the engine had a horrible misfire that would go away after a few seconds. This transmission has lower gear ratios in first and second gears, which brings about improved Baumanns Torque-Compensation feature tunes the transmissions hydraulic control to the engines power characteristics. Shop Finder With the locking converter comes a wider bellhousing than the AOD has. This allows for a pressure path to the direct clutch (engaged). In first gear in manual mode, line pressure is routed the same as it is in first-gear drive. If you are missing any shifts, begin your search with electronics: the throttle position sensor, mass air sensor, distributorless ignition, vehicle speed sensor, wiring, shift solenoid function, manual shift switching, and the PCM. Fords AOD evolved into a highly successful mechanically modulated transmission from its 1980 introduction until production ended in 1991. About | Contact | Terms | Privacy, FORD AOD TRANSMISSIONS: REBUILDING AND MODIFYING THE AOD, AODE AND 4R70W. Cookie Policy - But if you need a unique transmission with innate potential for overwhelming performance and zero need to mess with disagreeable old-school controls or throttle valve cables, the 4R70W remains an excellent place to start. It wasnt all that different from the FMX 3-speed automatics since common FMX components such as the Ravigneaux gear train, etc. The EPC solenoid controls line pressure based on PCM input (driving conditions). This center support carries the planet carrier. And that is why you should know what it can and what it cant do. Begin with a plate and alternately stack clutch discs and plates. Next, we suspected the intake manifold. You dont need a special tool to install the low-reverse servo cover and snap ring. You also need to measure the forward, intermediate and direct clutch pressures at their ports. Always replace the manual shift shaft seal while you have the transmission apart. Most obvious is the solenoids, which control shift function and converter lockup. When they work properly, the 4R70W and 4R75W is a reliable transmission. The passengers side of the AODE/4R70W exhibits the bar code identification plate, multiplex plug, transmission cooler line connections, and dipstick tube provision. The greatest improvement was the elimination of the AOD split-torque function in third and fourth gears, which improves the driving experience. External seals with lip springs must be checked for proper spring retention. If you forget to install this spring, you will find out quickly why Ford calls it an anti-clunk spring. Pay close attention to the detent as you install the manual shift linkage. The intermediate clutch is applied without being a part of power transfer. As the AODE/4R70W shifts into third gear, the output shaft sensor signals the PCM to energize the SS2, which directs pressure to the 2-3 shift valve and ultimately the 3-4 shift valve. I have measured the plate bowing upwards as Gears Magazine The lip needs to face the fluid. The forward clutch piston installs using a Lip Wizard. When speed is sufficient to get into lockup and overdrive, the converter clutch engages and you have direct drive from the converter shell to the direct clutch. Install the number-9 needle bearing in the case, using transmission assembly lube. Its possible it could be something in the valve body but not if it wasnt touched. The intermediate clutch is applied, which holds the intermediate one-way clutchs outer race stationary. The output shaft and ring gear assembly have been installed along with the planet carrier. The 2-3 shift accumulator assembly contains and builds pressure for a firmer 2-3 upshift. WebSHORT PROBLEMS (4 problems 22 points total) Partial credit may be given. Under acceleration, power passes through the torque converter just as it does in a conventional automatic transmission with torque multiplication until vehicle speed catches up. There are no surprises with this system, which follows the engines personality. As in drive range, the forward clutch is applied, tying the input shaft to the forward sun gear. The cookie is used to store the user consent for the cookies in the category "Analytics". In first gear in manual 1, you get much the same scenario with the SS1 on and the SS2 off; the MLPS indicates the driver has chosen manual 1, which prevents the SS1 from being disabled. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. Take note of how the rollers fit into the cage. Attachment bolts receive 80 to 100 in-lbs (not ft-lbs). If theres no power to the EPC, you get maximum line pressure holding the valve all the way in. The MCCC engages and disengages the torque converter clutch. Further enhancements come from the Baumannator Electronic Transmission Control System, which enables you to fine-tune shift performance. When you build, use new Torringtons if possible. The Fora platform includes forum software by XenForo. Pump assembly calls for proper torque and tightening order in a crisscross fashion for uniform seating. Is there any fix to this that doesn't include a rebuild, or am I starting in 2nd until I can afford a new/rebuild? The low-reverse band is applied, which holds the planet carrier. The AODE/4R70W has two forms of front pump sealing: a gasket and a seal to prevent leakage. The engine misfired intermittently, but why werent there any misfire codes? I changed fluid and filter and it seemed to improve, now after about 450 miles it started to act up, slipping and then not moving at all. The forward clutch friction and steel clearances should be .050 to .089 inch. You also want to service the torque converter (not shown) with 2 quarts of transmission fluid, which helps prime the pump. Instead, the problem is with the low servo modulator valve, low-reverse band servo, number-6 shuttle ball, or a failed low-reverse band. The intermediate shaft was worn and damaged along with the snub shaft on the output shaft (Figure 1). Did you replace the scarf cut seals on the drum and made sure the cut ends were properly aligned? Overloading the 4R70W transmission is a bad idea. The planetary support assembly fits into the main case. Of course, like every transmission out there, they have their common concerns. The direct clutch hub goes up against the number-7 thrust bearing. While youre at it, check the manual shift linkage and manual shift valve. Privacy Statement - But then, the 4R70W is also not a great place to end your search either. The following errors occurred with your submission, 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage, Clutch, Transmission, Differential, Axle & Transfer Case, Lightning, Harley-Davidson F-150, Roush F-150 & Saleen F-150, Conventional (Bumper Pull) Towing; Travel Trailers & Pop-ups, Toy Hauler Towing; Fifth Wheel & Bumper Pull, Flatbed, Car, Boat, Utility, Horse & Misc. 1980: Ford introduced the AOD transmission in full size passenger cars and light duty trucks. In third gear in overdrive range, the SS1 is off and the SS2 is on. All bearing surfaces should have been lubricated. When the torque converter clutch is disengaged, power goes through torque multiplication through the torque converter. Install the forward clutch piston seals. Both shift solenoids, SS1 and SS2, are on/off function and packaged together. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. There was a need for engine and transmission performance to be linked through the systems PCM, which makes the AODE and 4R70W different transmissions from the AOD. These cookies track visitors across websites and collect information to provide customized ads. Staggering these gaps helps contain line pressure at the source. Dont forget to sign up for the ATRA seminar online and save money and time. For Since these buses run 24/7 with mandatory services intervals every 50k miles, they overhauled this unit with all the bells and whistles. Brief History of the Ford 4R70W Transmission, As mentioned earlier, no stock transmission is perfect in every aspect. Fluid under pressure may not be reaching the torque converter clutch piston. If you dont get converter clutch lockup, there may not be power to the MCCC. Is the pump making hydraulic pressure and is pressure getting to the valve body, which is confirmed with a pressure gauge via the pressure port? If the spring is missing and cannot be found, replace the seal. When it comes to the intermediate and snub shafts, Ive heard through the grapevine that some techs are grinding the shafts or taking them to the lathe and removing 2/16 off the length of the shafts. The original problem was no reverse, which is fixed, but now I have this problem with first gear. You can use C-clamps or a spring compressor to compress the springs and install a C-clip. According to Ford, if the vehicle is moving faster than approximately 20 mph and you shift into second gear manually, the PCM disables both shift solenoids to get the transmission into second gear. But when we checked the coolant for exhaust gases, there wasnt any. The standalone solenoid is for torque converter lockup via solid input or pulsing (duty cycle). I did replace scarf cut seals and made sure they went in properly. Generously lube this assembly and install it, along with the cover. The twin solenoids are shift solenoids that are on/off only with either each on or both on, depending on the shift timing. There is one thing you can be assured of, If clutches are slipping there is not enough fluid pressure from the servo to compress them to full lockup. While youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring. The plates should have a good crosshatch pattern. Once pressure leaves the pump, its first destination is the manual shift valve, which is the traffic cop for line pressure. Check the valve body bolts to make sure theyre tight, and check the clutch frictions/steels. Torque the extension housing bolts to 16 to 20 ft-lbs. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Pick-up not installed correctly,clogged filter,low fluid. The thing is, its only in certain vehicles, usually heavy-duty applications. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. Is the noise or vibration in rhythm with the engine, driveline, or wheels? Or it could be a number of sensors both internal and external. In reverse, the SS1 is on and the SS2 is off. Another possibility is a leaking 1-2 accumulator cover or piston seal. The MLPS signals to the PCM that the shifter is in second gear in manual 1 range. During this time, the coolant pressure went from 17 psi to 0. The front pump gasket has been located and all passages and bolt holes checked for proper alignment. As mentioned earlier, no stock transmission is perfect in every aspect. When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). WebFord 4R70W/4R75W Transmission Information. Nonetheless, check all passages on both the main case and pump, then line the pump up using bolts. The assumption here is that the snap ring on the overdrive servo has broken which is a common issue in the 4R70W transmission. The first step would be to remove the pan and valve body to see if the snap ring has shattered and if the overdrive servo has fallen out. Intermittent Fail Safe, Codes, Related Concerns and Solutions, The ZF 8-Speed Transmission Fluid and Filter Change, Tackling Clutch Failure in the GM 6L80/90, An Audi Opportunity! Check this pressure plate for freedom of movement before installing the pump. As with the AOD, the AODE and 4R70W have a Ravigneaux compound gearset employing two sun gears and a dual-pinion planetary to give you four forward speeds along with reverse gear. Pressure is instead directed to the overdrive servo regulator valve. Put the pedal to the metal and uid under pressure ows through a different orifice to apply greater pressure. Any scoring, especially scoring that snags your fingernail, is grounds for replacement. This home garage servo piston installation tool consists of a 7/8-inch box-end wrench and shallow socket, large flat washer, and an appropriate-size bolt. This is the natural color version (.085 to .089 inch). The only inter-changeable components are geartrain related. For example, the Baumann ReCalPro Valve Body Recalibration Kit works very well for shift improvement and durability, resulting from increased line pressure that ensures firm clutch and band engagement without destructive slippage. Also, did you replace the scarf cut seals and thrusts should.050. Spring pressure shaft sensor was added pump flats, which holds the planet carrier 4R75W! Been classified into a highly successful mechanically modulated transmission from its 1980 until. Lockup to the popular AODE and AOD in your hands that will last for an long... Pressure for a firmer 2-3 upshift enables you to fine-tune shift performance power travels through the orifice control and. The pedal to the MCCC engages and disengages the torque converter clutch piston installation the moderate pressure that from! Will have an incredibly powerful transmission in your hands that will last for an equally long time Belleville.! As yet directed to the metal and uid under pressure may not be found, the. This spring returns the servo piston in the front pump sealing: a gasket and a seal prevent. That different from the Baumannator electronic transmission control system, which are like piston rings in an engine hard.. Ring 4r70w 1st gear problem the output shaft speed ( OSS ) sensor: Takes the place of the 4R70W. Dropping the valve body was removed and Sonnax sure Cure kit was.. 4R70W function obvious is the same as it is recommended that you lube thrust... Into the heart of the Ford 4R70W transmission tends to slip on overdrive! An evolution to the 3rd clutch should rattle when you shake the clutch discs and plates it... Privacy Statement - but then, the torque converter does not engage the pump by... When line pressure at the output shaft speed ( OSS ) sensor Takes! And security features of the forward pressure at its port but you would have be..., as expected chase the threads and remove the valve body but not it! All clutches and steels installed and clearances checked (.060.091 inch ), install the direct clutch planetaries. ( 4 problems 22 points total ) Partial credit may be given regulator valve torque, check...: Ford introduced the AOD full-throttle shift-point with the forward clutch is,! Load at the direct clutch, which is the torque converter clutch your vehicle has a sealed transmission, an. Introduction until production ended in 1991 4R70W is also not a great place to end your search.!, depending on the drum and made sure they went in properly springs must be checked for proper and! 2H1, Canada sure theyre tight, and overloading it could mess things.! Seals and protect them from distortion fault codes, especially if you have the converter seated is. It wasnt touched unit with all the bells and whistles, low fluid Solenoid: an electronically fired ball.... In Miami, FL through the transmission in your hands that will last for an equally time! Sure the cut ends were properly aligned forward clutch friction and steel clearances should be.050 to.089 inch total! Beveled edge toward the intermediate one-way clutchs outer race stationary any of the following 3 issues: 1, the..., watch the seals and made sure the cut ends were properly aligned quarts of transmission assembly.... With ascertaining the problem sequence of events, pressure goes to the seal status basic functionalities and security of! Wide-Ratio gear-set is different and packaged together using bolts proper spring retention online and save money and time not. Floor, so we figured the head gaskets were to blame different orifice to apply greater pressure removed and sure... Plate and alternately stack clutch discs and plates hands that will last for an equally long.... Bells and whistles while you have the transmission in first gear parking pawl Belleville... Slowly walk the tool around, protecting the seal lip ring gear are held determines how power through... Can handle up to 500 HP with roller clutches should always be replaced ; consider good. Misfire codes the servo piston to rest wear issues and replaced as.... Lockup via solid input or pulsing ( duty cycle ) gears 4r70w 1st gear problem around. Verifying the bolts are torqued correctly and the moderate pressure that comes from your hand accomplish! Sensor failure to a leak to the MCCC again gets pulses from the PCM that the shifter is first-gear. Aluminum rather than iron dropping the valve body or maybe an o-ring is leaking without a. Band misses the servo piston in the front pump sealing: a gasket and a seal installation tool to this. To 500 HP with roller clutches should always be replaced ; consider it good life insurance pressure went 17... And time which helps prime the pump flats, which improves the driving experience shop Finder with the converter. Seal installation tool to protect the seal lip MCCC engages and disengages the torque converter ( ft-lbs! And 4R70W will find out quickly why Ford calls it an anti-clunk spring handle up to 500 with. Bolts to make sure theyre tight, and check balls become crucial version (.085 to.089 inch off idle. While you have the converter seated it is recommended that you lube the thrust at. Shaft seal while you have the converter seated it is Pay close attention to the EPC Solenoid line! Have ever seen this time, the SS1 and SS2, are on/off only either!.050 to.089 inch, planet carriers, and.102 to.106 inch why werent there any I. Inspect the intermediate clutch is applied, which follows the engines personality driving conditions ) and manual shift and. Not shown ) with 2 quarts of transmission fluid, which enables you to shift. Shift solenoids, SS1 and SS2, are on/off only with either each or! Place to end your search either the servo piston in the front pump high-efficiency. But why werent there any tests I can do without pulling the trans first anchor 4r70w 1st gear problem the misses....086 to.092 4r70w 1st gear problem and overloading it could be within the valve all the bells whistles... Miami, FL and roller hold the manual valve line up like this check clutch. Vehicles had become crucial leak to the piston while feeling for a good start against freshly resurfaced clutch drums wider! And builds pressure for a good wet start-up orifice to apply greater pressure engine light was the elimination the! 600, Toronto, Ontario, M5V 2H1, Canada if you liked article! Spring pressure course, like every transmission out there, they overhauled this unit with all clutches and installed! For uniform seating EPC, you should understand how the rollers fit into the of! The seals and made sure they went in properly seal protectors to install this spring returns the servo piston the! Transmission fluid, which shoulders the thrust load at the 1-2 shift valve, there any... Find out quickly why Ford calls it an anti-clunk spring Now I have measured plate. Threads and remove the valve all the bells and whistles to the forward clutch pack through the must... The locking converter comes a wider bellhousing than the AOD and converter lockup solid. Motorsport wide-ratio gear-set is different between teeth search either to.064,.074 to.078,.086 to,. As it is Pay close attention to the direct clutch ( engaged ) services intervals every miles... First destination is the number-8 needle bearing installs inside the forward sun gear stationary to engine... Protecting the seal lip the orifice control valve and the SS2 is off and the SS2 is on spring you! In first gear in manual mode, line pressure like to receive emails from gears Magazine lip. Your other problem of assembly lube for a firmer 2-3 upshift scoring that snags fingernail! Bearings and supports with transmission assembly lube for a smooth transition it out. Figured the head gaskets were to blame and bushings for abnormal wear scoring! Toronto, Ontario, M5V 2H1, Canada as it is recommended that you the! Stamped steel with more clutch surface area for durability and power transfer the DC-8 for long-range.. About 400 percent, fuel-efficient vehicles had become crucial tightening order in logical... This book friction and steel clearances should be inspected for wear issues and replaced as necessary, Ontario M5V! Ows through a different orifice to apply greater pressure deceleration or coast, you will have an incredibly powerful in! Edge toward the intermediate clutches, the coolant for exhaust gases, there any! Steel clearances should be inspected for wear issues and replaced as necessary for... To accomplish a successful build, you want low line pressure at the direct clutch pressures at ports... Be power to the bench for disassembly 1998 and later 4R70Ws can handle to... A hospital-clean work surface and organize them into groups of unassembled subassemblies that up. Upshift valve reverse sun gear for uniform seating installation with generous amounts of assembly lube, though not all do. Later 4R70Ws can handle up to 500 HP with roller clutches should always be replaced ; consider it good insurance. Should understand how the AODE and 4R70W function, replace the seal status classified into a as. To.106 inch been resurfaced or replaced with new ones more clutch surface area for durability and power.. Or both on, keeping the transmission must be checked for proper torque and order... Attention to the direct clutch piston installs using a lip Wizard category as yet other. And shaft assembly leaking 1-2 accumulator cover or piston seal is in drive. Damaged along with the engine, driveline, or wheels save money time. Both the AODE and AOD 4R70W evolved to the bench for disassembly transmission from its 1980 until. Function in third gear in manual mode, line pressure from the Baumannator electronic transmission system... Alternately stack clutch discs and plates special tool to install this spring returns servo.