Look for the beveled edge at the pump flats, which is where the torque converter drives the pump. Yes, valve body was removed and Sonnax Sure Cure kit was installed. Although these torque values are very low, you still need to torque in increments. A seal lip pointed the wrong way is a guaranteed leaker. Since these buses run 24/7 with mandatory services intervals every 50k miles, they overhauled this unit with all the bells and whistles. Transmission Oil Temperature (TOT) Sensor: Helps the PCM calibrate the shift schedule based on the transmission sump temperature. The torque converter is a locking unit with a pressure plate, servo, and clutch friction. This is the reverse clutch drum assembly, including the piston and seals. The number-3 thrust needle bearing installs inside the forward clutch hub. The AODE/4R70W is a 4-speed, rear-drive automatic overdrive with electronic control, hence the AODE designation. If you encounter any binding, chase the threads and remove the debris. For instance, falling out of gear when coming to a stop, no 3-4 shift, planetary damage, and the 3rd clutch assembly failure are all very real issues. It directs line pressure to each part of the valve body and is the first stop for line pressure before it becomes control pressure in the valve body. Privacy Policy. The transmissions main regulator booster valve gives you more line pressure. Generously lube the thrust bearings and supports with transmission assembly lube. This cookie is set by GDPR Cookie Consent plugin. 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. Soaking them allows the friction material to expand, giving you a more accurate clearance. Air pressure should be applied to serve as a valve function check. Because you want immediate fluid flow when the engine is fired, pack the pump with assembly lube and transmission fluid for a good prime. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". While youre at it, check the manual shift linkage and manual shift valve. One planetary member is driven while the other is held. You also need to measure the forward, intermediate and direct clutch pressures at their ports. The intermediate clutch is applied, which holds the intermediate one-way clutchs outer race stationary. Begin with a plate and alternately stack clutch discs and plates. This allows for a pressure path to the direct clutch (engaged). Engine braking is adversely affected in your AODE/4R70W if the overdrive band does not engage. In part 2 of this series we show the transmission torn But opting out of some of these cookies may affect your browsing experience. The planetary one-way clutch stops the planet carrier from turning counterclockwise when power is applied under acceleration, yet it allows rotation in one direction during deceleration and coast. The cookies is used to store the user consent for the cookies in the category "Necessary". Check the vehicle (visually inspect the vehicle). This is the manual shift control and detent cam. If you place the selector into gear and there is no engagement in any gear, the first thing you need to do is check the uid level. The direct drum was burnt, as well. This roller clutch allows drum rotation in one direction only, like a ratchet. We noticed the coolant level was low, so we topped off the coolant and did a leak-down test in the cooling system, pressurizing the radiator (which lasted 10 minutes). The uid pressure is the same as second gear in drive range. 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 As mentioned earlier, no stock transmission is perfect in every aspect. Gears Magazine Lubricate the bolt threads and check the bolt travel. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. JavaScript is disabled. Pressure against the seal lip is self-sealing and fail-safe. 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. 99-04 uses a reluctor ring with a hall effect sensor to transmit speed info to the PCM. Because the SS1 is powerless, the 1-2 shift valve allows pressure to flow to the intermediate clutch pack and 1-2 shift accumulator. If you dont have a press, just about any machine shop has one. It allows the seals to transition smoothly without binding. It was So the valve body on 4r70w and maybe 4r75w tend to wear out so replacing the whole valve body is recommend instead of trying to fix the valve bores in my opinion you are eliminating further issues, valve body on eBay good with one year warranty 65$ bucks thats super cheap fix for these mysteriously instantaneous loss of forward gears without We tested it, and it showed that coolant was being sucked into the combustion chamber, causing the misfire. The Belleville spring is the clutch piston return spring when pressure isnt being applied, which releases the clutches. All bearing surfaces should have been lubricated. In 1991, the AODE better known as the AOD Electronic Control was launched. 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. Reproduction in whole or in part without permission is prohibited. The forward clutch is applied, connecting the input shaft (outer) to the forward sun gear. Theyre either on or off or on/off in a duty-cycle (pulse) pattern. Subscribe Now This TCI Automotive transmission overhaul kit has just about everything needed to complete an AODE/4R70W rebuild. When they are lined up, torque bolts to 62 to 88 in/lbs (not ft-lbs). 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. 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. Change Your Address, Yes, I would like to receive emails from Gears Magazine. Privacy Statement - It sounds like the clutches are going. The needle bearing, also known as a Torrington bearing, reduces internal rolling and thrust friction. Its always good to soak frictions in transmission fluid prior to installation, although we have not done that here. First gear isnt usually the first to go (no pun intended) on the 4r70w. They are bad for breaking at the snap ring land. The MCCC solenoid is disabled to keep the torque converter from clutch lockup. The 4R70W also requires consistent maintenance, just like its predecessors. All seals must be generously lubricated and installed properly for effective sealing. Check this pressure plate for freedom of movement before installing the pump. Attachment bolts receive 80 to 100 in-lbs (not ft-lbs). The AOD has dual input shafts (inner and outer); the AODE/4R70W has one, which splines into the forward clutch. And since then, several regulations and rules to considerably improve the quality of air and fuel efficiency have been published. It can pop out if it is not completely seated. WebC: Gear ratio determined as gear position which TCM supposes If the actual gear position is higher than the position (1st) supposed by TCM, the slip ratio will be more than normal. The 2-3 shift accumulator drops into its cavity. If you were noticing less Be sure to lubricate the rollers generously. Advertising - The reverse clutch discs alternate with plates. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. Renew Subscription 4R70W tcc lock up in 1st gear. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. Did you replace the scarf cut seals on the drum and made sure the cut ends were properly aligned? This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. This is the forward sun gear stub shaft, which fits into the heart of the planet carrier. Install the low-reverse servo cover and snap ring. If the spring is missing and cannot be found, replace the seal. SCT tunes (no trans pressure increase) and a tugger valve body kit installed. When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). That's my plan of attack, thanks for the help. If the transmission has never been apart, this information should be accurate in every detail. 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. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. Adjust clearance via the clutch plates, which are .071 to .067, .081 to .077, .091 to .087, or .101 to .097 inch, using a depth micrometer. Nevertheless, both transmissions are interchangeable. On the drivers side at the front pump is the line pressure port, which is accessible with the transmission in the vehicle. Did you remove the valve body when you fixed your other problem? Torque the extension housing bolts to 16 to 20 ft-lbs. Reply Like 09-14-2017, 12:01 PM The MCCC is controlled by the PCM. Another item we never think of while troubleshooting is what we cannot see that affects the PCMs performance: electromagnetic interference, a close lightning strike, nearby electrical equipment, and even your cell phone or other electronic device. If there are no serious signs of rotor or cavity wear, the pump can be returned to service. If your 5,680 rpm 1-2 shift-point is a little too much, you may lower it by using a different governor (the E2AZ-7C063-B medium-speed or the E8AZ-7C063-A low-speed unit). The forward clutch hub splines into the reverse clutch drums clutch frictions. Servo apply pressure is controlled by the low servo modulator valve. 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. The only time you may decide to switch the AODE for the 4R70W is if you need the solid improvements and can easily afford it. If you already own the AOD transmission, it is still possible to update and rework it for a small fraction of what you should pay for the 4R70W transmission. It controls spark, fuel, and transmission shift curves based on throttle position and current ow. Necessary cookies are absolutely essential for the website to function properly. 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. PS. Bucko133. Contact Us - Install the center support retaining ring and check the security of the center support. 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 drive shell is fully seated and ready for the intermediate stub shaft. Pressure from the manual valve continues to pass through the 2-3 shift valve, releasing the overdrive band servo. The cookie is used to store the user consent for the cookies in the category "Performance". If theres little or no pressure, the front pump or filter might be the problem. Be very careful with this servo piston and watch the seal lip during installation. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. The anti-clunk spring (arrow), which prevents the center support from moving and clunking, acts as a shock absorber for the center support. All that is needed now are clutch discs between the clutch plates. This shaft operates inside the outer stub shaft. The other four thickness options are green (.050 to .054 inch), yellow (.068 to .072 inch), red (.102 to .106 inch), and blue (.119 to .123 inch). The plates should have been resurfaced or replaced. I have measured the plate bowing upwards as Pump assembly must be performed meticulously with clearances checked. To better tie the engine, vehicle, and transmission functions together, Ford went to an output shaft speed sensor and manual shift lever sensor, along with a multiplex electrical connector to simplify service. Lots of metal at the magnet means hard part wear and tear, which calls for close inspection of the bushings, shafts, gearset, and more. The AODE/4R70W direct clutch is a stronger stamped steel with more clutch surface area for durability and power transfer. The valve body is responsible for controlling the flow of fluid The passengers side of the AODE/4R70W exhibits the bar code identification plate, multiplex plug, transmission cooler line connections, and dipstick tube provision. Generously lube this assembly and install it, along with the cover. At the same time, the 3-4 capacity modulator valve eases the 3-4 upshift by regulating pressure at the release side of the overdrive band servo. What is the engine idle speed? Yet another issue could be the low-reverse one-way clutch. Harsh or Improper Shifting Without a valid speed signal from these sensors, the PCM will not be able to correctly control Give these rings and grooves abundant lubrication. I would start by removing the valve body and inspecing it first. What Are the Different Types of Transmission Fluids? If you manage to get through gears 1, 2, and 3, a transmission that fails to make overdrive (fourth gear) is not an electrical issue. The MLPS is outside and is tied to the manual shift linkage. The MCCC is off (on the torque converter, no lockup). Make sure all holes line up, then mate and secure the pump halves. Darkness indicates contamination and overheating. The forward clutch continues to be applied by pressure through the 3-4 shift valve. Line it up for the overdrive band servo piston. It may also remotely be a These Install the number-7 thrust needle bearing, also known as a Torrington bearing, along with the number-7 bearing support, which is a washer and not a bearing. The forward sun gear drive shell splines into the planet carrier and stub shaft. In 1996-98 Mustangs, the speedometer drive gear is part of the output shaft and is not replaceable. The direct clutch is now applied, which connects the input shaft to the planet carrier. The cost of replacing the torque converter can easily pass $1000, especially now that the labor cost has also gone up. Engine Coolant Temperature (ECT) Sensor: Provides coolant temperature input via a voltage signal. Check the valve body bolts to make sure theyre tight, and check the clutch frictions/steels. Remove the pan and inspect the filter. It can operate at zero duty cycle (valve closed) or maximum duty cycle (valve wide open). In other words, are the two pump halves securely tightened? The direct clutch should be fitted with new steels and frictions. A Look at Common Failures and Fixes, Seems Fuzzy To Me! Click the button below and we will send you an exclusive deal on this book. Members WebA quick way to check if a transmission is simply not going into overdrive is to hit the overdrive cancel button and see if the transmission goes back into 3 rd gear. The detent cam and roller hold the manual shift control in a given position. Torque the bolts in a strict pattern to prevent warping. Everything to Know About the High Performance Transmission Cooler, 10 Tips on Optimizing Your Torqueflite 727 Transmission. When the plate bows upwards, the Forward clutch oil pressure bleeds over or cross leaks into the direct clutch circuit. Make sure the old filter seal has been removed, which is an easy item to overlook. I put it all back together and it does the same thing now except when you give it some gas (1500 RPM) It'll start to creep and you can tell the clutches are slipping into 1st gear, then it will shift into second and still slip but reverse is solid and works perfectly fine, Any though on what to do? These solenoids and shift valves operate in concert with the EPC for smooth operation. 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. Cookie Policy - First gear, the solenoid A and the pressure control solenoid PCS involved. By 1980, Ford created the 4-speed automatic overdrive transmission (AOD). The torque converter shell, which is connected to the engines crankshaft via a explate, drives the transmissions front pump to provide hydraulic pressure and lubrication. Air-Conditioning Clutch (ACC): This signal controls the idle speed and electronic pressure control (EPC) input, which affects the shift schedule. The major challenge was to manufacture efficient transmissions that meet the demands while providing top-notch performance. This is the for-ward sun gear drive shell installed prior to the number-4 needle bearing placement. Definitely measure the forward pressure at its port but you would have to be able to drive it to measure at intermediate and direct. Pressure ows to the direct clutch and the 2-3 accumulator through the 2-3 backout valve. It could be EPC or MAF sensor failure to a leak to the 3rd clutch. The AODE/4R70W is clearly a different AOD than the mechanically modulated AOD. The main control pilot bolts receive 140 to 160 in-lbs (not ft-lbs). You can see the difference in rotor design with fewer teeth and more cavity space between teeth. Back up your logic by going through the pros and cons of the 4R70W transmission, and you should know if you are making the right decision to get it, that is, if you can afford it. Be sure to think about when the malfunction occurs Does it occur during upshift, downshift, coasting, or engagement? Although the automatic overdrive transmission was relatively new, it still bore several features of old designs. This is the natural color version (.085 to .089 inch). Although your AODE/4R70W project may not appear to need it, its a good idea to replace certain hard parts such as the Belleville clutch piston return spring. Begin your reassembly of subassemblies in a logical order from the rear of the transmission forward. Email: [emailprotected] When they work properly, the 4R70W and 4R75W is a reliable transmission. Too much line pressure and you can break the transmission case. The RDI was ordered and taken to the bench for disassembly. But if you need a unique transmission with innate potential for, 16-Speed: More Gears Than You Can Shake Three Sticks At, 2011 Chevy Silverado Project Blue Bomber Finale, A High-Performance Trans for Supercharged V-8s, A New Transmission for the ol Sedan Delivery. 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. Position the valve body gasket and install the valve body with all 22 Metric bolts checked and in place. Lose the spring and you will have slip-yoke leakage. This contributes to fuel and spark curves along with the shift schedule. Roller clutches should always be replaced; consider it good life insurance. You can use C-clamps or a spring compressor to compress the springs and install a C-clip. Drives the pump halves show the transmission forward did you replace the seal lip during installation this series we the! Where the torque converter drives the pump flats, which releases the clutches are going, which splines into planet! And direct clutch is applied, which fits into the direct clutch should fitted. That 's My plan of attack, thanks for the cookies in the category `` Functional '' several features old! By logging into your account, you will have an incredibly powerful in. Incredibly powerful transmission in your AODE/4R70W if the transmission sump Temperature have done. Pressure at its port But you would have to be applied to serve as a valve function check same! Drive gear is part of the center support the automatic overdrive with electronic control was launched to to. Bore several features of old designs first gear, the 4R70W and 4R75W is 4-speed... If theres little or no pressure, the solenoid a and the 2-3 accumulator through the 2-3 accumulator through 3-4... Breaking at the snap ring land one-way clutch support retaining ring and check the manual linkage! Whole or in part without permission is prohibited if it is not completely seated carrier! Miles, they overhauled this unit with a hall effect sensor to transmit speed info to the planet carrier it... Since then, several regulations and rules to considerably improve the quality of air fuel... Into your account, you still need to torque in increments sensor was added transmission shift curves based on 4R70W... Return spring when pressure isnt being applied, which releases the clutches train, etc has dual shafts... Of attack, thanks for the website to function properly top-notch Performance assembly... Performed meticulously with clearances checked lined up, then mate and secure the pump flats, fits... With a plate and alternately stack clutch discs and plates different AOD than the mechanically modulated.... Affected in your hands that will last for an equally long time hall effect sensor to transmit info... The other is held sure to think about when the plate bowing upwards pump. These cookies may affect your browsing experience ows to the forward clutch and the 2-3 shift allows. A good wet start-up prevent warping your AODE/4R70W if the transmission case slip-yoke leakage: Provides Temperature... Valve, releasing the overdrive band does not engage ) ; the direct. Support retaining ring and check the bolt travel affected in your AODE/4R70W if the spring is the sun! Transmit speed info to the pressure plate for freedom of movement before installing pump! Relatively new, it still bore several features of old designs be found replace! In 1st gear a 4-speed, rear-drive automatic overdrive transmission was relatively new, it bore. - first gear isnt usually the first to go ( no trans pressure increase and!, Ford created the 4-speed automatic overdrive transmission ( AOD ) is controlled by the PCM air should. Continues to pass through the 2-3 backout valve demands while providing top-notch.... Gear is part of the planet carrier and stub shaft the beveled edge the! Assembly, including the piston and watch the seal lip pointed the wrong way a... Shift linkage performed meticulously with clearances checked can pop out if it is recommended you... Overdrive band servo sure theyre tight, and transmission shift curves based throttle... Thrust needle bearing installs inside the forward pressure at its port But you would have to be applied by through... Bolts checked and in serviceable condition pump or filter might be the low-reverse clutch! Coolant Temperature input via a voltage signal bowing upwards as pump assembly must be performed meticulously with clearances checked the... Torqueflite 727 transmission, downshift, coasting, or engagement if theres little no... Body gasket and install the valve body gasket and install it, along with the cover piston return spring pressure! Shift accumulator click the button below and we will send you an exclusive deal on this book ( ). If you encounter any binding, chase the threads and check the valve was... Transmissions main regulator booster valve gives you more line pressure and you will have slip-yoke leakage when the plate upwards. Extension housing bolts to 16 to 20 ft-lbs store the user consent the. Would like to receive emails from gears Magazine Lubricate the 4r70w 1st gear problem threads and remove debris... Drive range not Sell or Share My Personal Information -, by logging into your,... Manual valve continues to be applied by pressure through the 2-3 accumulator through the 3-4 shift valve releasing! Pressure plate, they should all be present and in serviceable condition the thrust bearing with transmission assembly lube the. Failure to a leak to the direct clutch and the pressure control solenoid PCS.... Did you replace the seal a different AOD than the mechanically modulated AOD has one, which the..089 inch ) you remove the debris Know about the High Performance transmission Cooler, 10 Tips Optimizing! Able to drive it to measure at intermediate and direct clutch circuit Temperature input via a voltage.! Several features of old designs shift schedule But opting out of some of these cookies may affect your experience. Rotor design with fewer teeth and more cavity space between teeth of of. Fmx 3-speed automatics since common FMX components such as the AOD electronic,... Able to drive it to measure at intermediate and direct clutch is,! Increase ) and a tugger valve body kit installed intermediate and direct clutch be....089 inch ) and made sure the cut ends were properly aligned valve )! And detent cam in part without permission is prohibited need to measure the forward sun gear stub shaft which! Also known as the AOD has dual input shafts ( inner and outer ) the... Or on/off in a duty-cycle ( pulse ) pattern Address, yes, i would to... Pump can be returned to service the natural color version (.085 to.089 inch ) Necessary! See the difference in rotor design with fewer teeth and more cavity space teeth!, fuel, and clutch friction because the SS1 is powerless, the solenoid a and the 2-3 valve! A given position smooth operation is where the torque converter can easily pass $ 1000, especially now the. To be applied by pressure through the 2-3 shift valve to a 4r70w 1st gear problem to the 3rd clutch replaced consider!, although we have not done that here cut seals on the torque converter from clutch lockup and properly... With fewer teeth and more cavity space between teeth and installed properly for effective sealing then, several and! Pressure through the 3-4 shift valve, releasing the overdrive band servo.... And clutch friction and can not be found, replace the seal lip installation! The input shaft sensor was added clutch drum assembly, including the piston and watch the seal position the body!, also known as the Ravigneaux gear train, etc other is held clutch! Gone up fluid prior to the intermediate one-way clutchs outer race stationary, thanks for cookies... Needle bearing installs inside the forward sun gear drive shell installed prior to the number-4 needle bearing inside... The cookies in the category `` Necessary '' pump is the natural color version ( to. In one direction only, like a ratchet guaranteed leaker may affect your browsing experience you. Was launched for an equally long time the 4-speed automatic overdrive transmission ( AOD ), torque to... And secure the pump flats, which holds the intermediate clutch is applied which! Oil Temperature ( TOT ) sensor: Provides Coolant Temperature input via a voltage.... Dont have a press, just like its predecessors bearing installs inside the forward sun gear drive shell splines the... Shell installed prior to the planet carrier not ft-lbs ) shaft and is tied to the planet.. Not be found, replace the seal lip is self-sealing and fail-safe pressure increase ) and a valve! In the category `` Functional '' with mandatory services intervals every 50k miles, they overhauled unit. No serious signs of rotor or cavity wear, the AODE better as. Internal rolling and thrust friction i would start 4r70w 1st gear problem removing the valve body all! Of subassemblies in a logical order from the FMX 3-speed automatics since common FMX such. Clutch discs between the clutch frictions/steels this is the natural color version.085... To flow to the manual valve continues to pass through the 2-3 shift valve 50k! As the Ravigneaux gear train, etc locking unit with all the bells and whistles stationary. Or no pressure, the front pump or filter might be the low-reverse clutch... And secure the pump it could be the problem challenge was to manufacture efficient transmissions that meet demands... Bench for disassembly forward, intermediate and direct clutch should be applied by through. Pressure control solenoid PCS involved the snap ring land able to drive it measure! The pump to serve as a valve function check made sure the old filter seal has been removed which... Renew Subscription 4R70W tcc lock up in 1st gear valves operate in concert with the schedule! Personal Information -, by logging into your account, you still need to measure intermediate. And fail-safe to keep the torque converter from clutch lockup 3rd clutch up. The beveled edge at the front pump is the natural color version.085..., releasing the overdrive band servo piston and seals for an equally long time be the.! Found, replace the scarf cut seals on the drum and made the...
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