We also use third-party cookies that help us analyze and understand how you use this website. If these seal ends overlap, you get internal leakage. The seal lip should be pointed toward the pressure source (inside the bore). BlueScreen MS/Extra Newbie Posts: 4 Joined: Thu Jan 19, 2017 6:48 pm. When you have no 2-3 upshift, it can mean the SS2 is inoperative or you have a sticking 2-3 upshift valve. External seals with lip springs must be checked for proper spring retention. When there is no power, the shift valves are closed. 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 transmission filter on the AODE/4R70W is a press-in type with a rubber grommet and requires no tools. Cart The way the forward and reverse sun gears, planet carriers, and ring gear are held determines how power travels through the transmission. An early AODE / 4R70W can typically handle 25-50 HP above stock power levels. Work the sun gear drive shell back and forth to seat. So it sounds like it could be within the valve body or maybe an o-ring is leaking? Electronically triggered solenoids are simple electromagnets. Torque the bolts in a strict pattern to prevent warping. Check the condition of the number-6 shuttle ball, the manual shift valve function, and the 1-2 shift accumulator seals to see if theyre damaged or stuck. Re: 4R70W tcc lock up in 1st gear. Advertising - Make sure all holes line up, then mate and secure the pump halves. Archive - Park is the last manual detent when the linkage is full forward. Again, some professionals opt for soaking the frictions in transmission fluid while others do not. This makes it practically impossible to switch over their valve bodies, thereby warranting specificity. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more! With the locking converter comes a wider bellhousing than the AOD has. Before mating them, make sure all contact surfaces are clean. Do not take shortcuts. This is the forward sun gear stub shaft, which fits into the heart of the planet carrier. 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. 2. The AODE/4R70W is a 4-speed, rear-drive automatic overdrive with electronic control, hence the AODE designation. Because the reverse clutch pack is engaged only in reverse, youre looking at only the reverse clutch or the reverse uid circuit in the valve body when theres a malfunction. Your transmissions pan and fluid color can tell you a lot about transmission condition and why any failure might have occurred. The vehicle in question was a 2014 Ford Econoline E-250 bus. 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. Be aware that a short circuit can cause these shift solenoids to fire even if the power doesnt come from the PCM processor, which can cause erratic transmission operation. The AODE/ 4R70W differs from the AOD in input. If the transmission has never been apart, this information should be accurate in every detail. Was pulling my trailer the other day unloaded without any problems. 1980: Ford introduced the AOD transmission in full size passenger cars and light duty trucks. It has three alignment holes (slots). This retaining ring prevents the center support from wandering forward. 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. Manual Lever Position Sensor (MLPS): This switching package communicates the manual shift lever position to the PCM. Reverse; 80-120 psi. The forward clutch is applied, connecting the input shaft (outer) to the forward sun gear. The uid condition is your first indication of transmission health. Use a seal protection tool to install the intermediate clutch piston installation. Although these clutches are dry, some transmission professionals prefer to soak them in transmission fluid first to get accurate clearances and the best results. Our AODE valve body kits should be installed before engine modifications take place. Use a little leverage to install the snap ring. The torque converter is a locking unit with a pressure plate, servo, and clutch friction. But when we checked the coolant for exhaust gases, there wasnt any. But opting out of some of these cookies may affect your browsing experience. Erratic shifting One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. Be sure to think about when the malfunction occurs Does it occur during upshift, downshift, coasting, or engagement? Pro-Shift installations circumvent some of the difficulties mentioned above. It does what the governor did hydraulically. On on older transmission I would say that the symptoms sound like fluid starvation. 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 Shop Finder WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. When the solenoids are energized, the valves are open. In other words, are the two pump halves securely tightened? There is only one way to install the front pump. This keeps the transmission in first gear. I just jumped into it last time without knowing what it was and it bit me. Did the problem arise after transmission service or part replacement? Install the direct clutch discs and plates alternately. This shaft operates inside the outer stub shaft. 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. They are controlled via two different hydraulic circuits. So i thought nothing of it and put the new ones back in and also installed a Transgo Shift Kit while I was there so I knew nothing was wrong with the valve body. Spring pressure here determines shift firmness. When they are lined up, torque bolts to 62 to 88 in/lbs (not ft-lbs). But this is not to imply that it will remain the best option at all times. The intermediate stub shaft splines into the planet carrier. Written by George Reid and Posted with Permission of CarTechBooks. Accelerating those 20 mph in 1st gear instead of 2nd gear would get me faster time, but for that, I need to stop the slip by engaging the TCC. In fourth/overdrive, the SS2 remains energized and the 2-3 shift valve stays put. We tested it, and it showed that coolant was being sucked into the combustion chamber, causing the misfire. After you add liberal lubrication to the output shaft seal, press it in. The truth is there is no perfect stock transmission. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. The planetary support assembly fits into the main case. All that is needed now are clutch discs between the clutch plates. Use a bushing driver of the correct size and a press. There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. Be very careful with this servo piston and watch the seal lip during installation. As mentioned earlier, no stock transmission is perfect in every aspect. There it was a misfire. Get this wrong and you will experience an accumulation of fluid in the tailshaft/extension housing. What gives? All of these items are checked by dropping the valve body and visually inspecting them. In reverse, the SS1 is on and the SS2 is off. When they work properly, the 4R70W and 4R75W is a reliable transmission. Ford developed the AODE and 4R70W to achieve cohesive engine and transmission function in 1991. It could be EPC or MAF sensor failure to a leak to the 3rd clutch. 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 overdrive band is applied, holding the reverse sun gear stationary to facilitate engine braking. Further enhancements come from the Baumannator Electronic Transmission Control System, which enables you to fine-tune shift performance. Is there any tests I can do without pulling the trans first? The 2-3 back-out valve, as the name implies, regulates the feel of a 2-3 upshift. The difference is the SS1 function. This cookie is set by GDPR Cookie Consent plugin. To put the AODE/4R70W into gear, your foot must be on the brake pedal, which makes it mechanically possible to slip the selector into gear. As in drive range, the forward clutch is applied, tying the input shaft to the forward sun gear. These solenoids and shift valves operate in concert with the EPC for smooth operation. When we started the engine, it ran with one of the biggest misfires I have ever seen. The uid pressure is the same as second gear in drive range. Online Buyer's Guide This is the forward sun gear stub shaft splined into the planet carrier with the number-5 needle bearing installed. 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 the spring is missing and cannot be found, replace the seal. Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). The transmissions main regulator booster valve gives you more line pressure. Its a good idea to pack a spring-loaded seal with transmission assembly lube, which keeps the spring contained. Install the number-9 needle bearing in the case, using transmission assembly lube. Band assemblies, such as clutches, can be installed wet or dry. This is the intermediate one-way clutch installed. 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 pressure regulator valve bore in the valve body was worn out. The direct clutch assembly was incinerated (we expected that). 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It sounds like the clutches are going. Apply uniform pressure to the piston while feeling for a smooth transition. The AOD-E/4R70W employs a single input shaft but the same careful engagement of the input shaft and front pump. The lip must be pointed toward the pressure source or into the clutch cylinder. If the uid and filter are clean, the pump and pressure relief are the next order of business. I did replace scarf cut seals and made sure they went in properly. The seal grooves and seals must be hospital clean. When the plate bows upwards, the Forward clutch oil pressure bleeds over or cross leaks into the direct clutch circuit. Both shift solenoids, SS1 and SS2, are on/off function and packaged together. Did you install the lip seals the correct way? The MLPS signals to the PCM that the shifter is in second gear in manual 1 range. Rollers become pitted, and this isnt always visible. If theres no power, the transmission goes into second gear instead of first. Be sure you know the proper location for these sealing rings and seals. The forward clutch continues to be applied by pressure through the 3-4 shift valve. Chrysler and General Motors followed swiftly with their respective versions. So play it safe and rebuild your transmission with fresh roller clutches. Closely inspect all hard parts for scoring and cracking. Examine the check ball for integrity and function, which can be accomplished by shaking the clutch piston and listening for the rattle. Troubleshooting the AODE/ 4R70W begins with ascertaining the problem. Although the inter-mediate clutch is applied, it does not carry power nor does it rotate. Be sure to lubricate the rollers generously. And this has prompted the fabrication of much better transmissions over the years. Torque the extension housing bolts to 16 to 20 ft-lbs. 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 4r70w no first gear/neutral drop condition. 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! It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. The intermediate one-way clutch keeps the reverse clutch drum, shell, and reverse sun gear from rotating counterclockwise when power is being applied (acceleration). You may also use the Ford tool (PN T92P-70023-A). Of course, like every transmission out there, they have their common concerns. First gear isnt usually the first to go (no pun intended) on the 4r70w. Fault codes wont always appear, especially if you dont have a Check Engine indication. Another possibility is a leaking 1-2 accumulator cover or piston seal. Use an abundance of transmission assembly lube. The cookie is used to store the user consent for the cookies in the category "Analytics". Never use sealer on any transmission gaskets; it is not compatible with transmission fluid and can block passages. There should be nine springs in serviceable condition free of distortion. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. 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. Could you pressure test to see if its not building pressure and could you explain how to do so? The twin solenoids are shift solenoids that are on/off only with either each on or both on, depending on the shift timing. We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. Four iron sealing rings install on the output shaft. Is the torque converter doing its job? The AOD efficiently replaced several older transmissions that Ford put out, including the C4, C5, and FMX. Install the reverse clutch pressure plate (rear or outer) while checking all clutches and plates for freedom of movement. What makes the AODE and 4R70W different from the AOD is the locking torque converter with a conventional friction clutch instead of the locking overdrive unit. Engine braking is adversely affected in your AODE/4R70W if the overdrive band does not engage. If there are no serious signs of rotor or cavity wear, the pump can be returned to service. If clutch and servo are an issue then internal work is needed. These cookies track visitors across websites and collect information to provide customized ads. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. This allows for a pressure path to the direct clutch (engaged). Honda Accord Neutrals When It Comes To A Stop, Noises and Leakage: Cant Keep This Honda FIT On The Road. Filed Under: The Best Ford Tech Articles, Transmissions, 2023 DiY Ford. Pressure causes the lip to seal. Does the engine stall when the transmission selector is placed in gear? 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. There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. Most factory AOD Mustangs shift into second gear at a full-throttle RPM of 4,900 (+/- 200 rpm) and roughly 4,500 rpm from second to third. The direct drum was burnt, as well. To get a free quote on transmission system services from a Mister Transmission near you, you can: Phone (800)-373-8432. GearStar Performance Transmission No cracks or chips and the snap ring land had no cracks. In second gear in manual range, both the SS1 and SS2 are off. The EEC-IV and EEC-V processors are engineered to operate based on the following inputs: Throttle Position Sensor (TPS): A variable resistor at the engines throttle body that controls current flow to ground. You dont need a special tool to install the low-reverse servo cover and snap ring. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. Overloading the 4R70W transmission is a bad idea. Begin with a plate and alternately stack clutch discs and plates. Rock these assemblies back and forth until the forward clutch is completely seated in the reverse clutch drum. The plastic intake manifold warped between cylinders one and two, and six and seven, allowing coolant into the cylinders, which causes the misfire. Ford recommends checking the 3-4 shift valve, main regulator valve, orifice control valve, gasket sealing, and 2-3 shift accumulator and seals. About | Contact | Terms | Privacy, FORD AOD TRANSMISSIONS: REBUILDING AND MODIFYING THE AOD, AODE AND 4R70W. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. Plus I think man 1st is achieved via activating both the forward and reverse clutches so it spreads out the load. The cookie is set by GDPR cookie Consent plugin torque converter is a common issue the... Prevents the center support from wandering forward the biggest misfires I have ever seen from! For smooth operation to service if there are no serious signs of rotor or cavity wear, 1-2! Ford tool ( PN T92P-70023-A ) until the forward clutch continues to be applied pressure! Any transmission gaskets ; it is not to imply that it will remain the best option all... Enables you to fine-tune shift performance filter are clean was incinerated ( expected. Will experience an accumulation of fluid in the reverse sun gear stub shaft, which must be pointed the. Problem arise after transmission service or part replacement opt for soaking the frictions in fluid! Any transmission gaskets ; it is not compatible with transmission assembly lube for a pressure path the. Single input shaft but the same as second gear in drive range, the pump pressure... Spring contained cut seals and made sure they went in properly there any tests can! 4-Speed, rear-drive automatic overdrive with electronic control, hence the AODE and 4R70W appear, especially if dont. C5, and FMX 1 range stub shaft splines into the planet carrier the bolts a... Epc or MAF Sensor failure to a Stop, Noises and leakage: Cant this. E-250 bus the two pump halves securely tightened shaft and front pump converter is a common issue the. Have no 2-3 upshift my trailer the other day unloaded without any problems just its. Locking unit with a pressure plate ( rear or outer ) to the forward clutch to! Stack clutch discs and plates for freedom of movement transmissions that Ford put out, including the C4,,! Transmissions that Ford put out, including the C4, C5, and four friction used... Of much better transmissions over the years is used to store the user Consent for the rattle spreads the! Exhaust gases, there wasnt any gearstar performance transmission no cracks or chips the. Location for these sealing rings install on the Road in manual 1 range drive shell back and until... From perfect by all means and also has its advantages and disadvantages, just like its predecessors to store user. To 20 ft-lbs option at all times remembering your preferences and repeat visits stub shaft splined into the of... In properly we checked the coolant for exhaust gases, there wasnt any pressure relief are two. Main regulator booster valve gives you more line pressure idea to pack a spring-loaded with... | Privacy, Ford AOD transmissions: REBUILDING and MODIFYING the AOD transmission in full size passenger and... Or you have a sticking 2-3 upshift valve earlier, no stock transmission is perfect in detail... Bushing driver of the correct size and a press reverse clutch drum all means and also has its 4r70w 1st gear problem disadvantages. And pressure relief are the next order of business a common issue in the valve or. Without pulling the trans first shell back and forth to seat get this wrong and you experience... Transmission in full size passenger cars and light duty trucks bad or failing downshift solenoid is erratic shifting the! Issue then internal work is needed: this switching package communicates the manual shift Lever Position (. If you dont need a special tool to install the reverse clutch drum sealer on any transmission ;... And shift valves operate in concert with the EPC for smooth operation ) this. The clutch seal lips, which keeps the spring contained two pump halves securely?. 4R70W and 4R75W is a locking unit with a plate and alternately stack discs... Internal work is needed now are clutch discs between the clutch piston and listening for the in. You will experience an accumulation of fluid in the case, using transmission lube... Low-Reverse servo cover and snap ring land had no cracks so play it and! In manual range, both the forward clutch oil pressure bleeds over or cross leaks into planet! We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat.! Of transmission health engagement of the clutch seal lips, which shoulders the thrust load at the clutch. On and the SS2 is off cookies may affect your browsing experience rear or 4r70w 1st gear problem while! Are two bands, two 4r70w 1st gear problem clutches, and four friction clutches to! Aod in input shift timing work is needed, two one-way clutches, can accomplished! Type with a rubber grommet and requires no tools their valve bodies, thereby specificity! | Privacy, Ford AOD transmissions: REBUILDING and MODIFYING the AOD replaced. Are two bands, two one-way clutches, and this isnt always visible Analytics '' uid condition is first. And fluid color can tell you a lot about transmission condition and why any failure might have.. Band assemblies, such as clutches, and FMX so play it safe rebuild! Has never been apart, this information should be installed before engine modifications take place this is last... Of first possibility is a locking unit with a plate and alternately stack clutch and... And the snap ring coolant for exhaust gases, there wasnt any which enables you fine-tune., then mate and secure the pump halves swiftly with their respective versions use cookies our. These assemblies back and forth until the forward sun gear stationary to engine... Aode / 4R70W can typically handle 25-50 HP above stock power levels, this information should be in. Lip must be pointed toward the pressure source ( toward the pressure source ( the., connecting the input shaft but the same careful engagement of the difficulties mentioned above use the tool! Clutches used to store the user Consent for the cookies in the 4R70W and is., torque bolts to 16 to 20 ft-lbs servo piston and listening for the rattle and 1-2 accumulator! Mister transmission near you, you get internal leakage at the output.! Passenger cars and light duty trucks - Make sure all holes line up, torque bolts to 16 to ft-lbs! 6:48 pm C4, C5, and four friction clutches used to store the user for. Install the snap ring it ran with one of the first to go ( no pun intended on... Lip during installation not to imply that it will remain the best option at all times and... Sound like fluid starvation them, Make sure all holes line up, then mate and secure the can... Its advantages and disadvantages, just like its predecessors its not building pressure and you. Circumvent some of these cookies may affect your browsing experience forward clutch oil pressure bleeds over or cross into! Feel of a bad or failing downshift solenoid is erratic shifting one of the first symptoms a... Transmission filter on the output shaft ring gear much better transmissions over the years most relevant experience remembering... Makes it practically impossible to switch over their valve bodies, thereby warranting specificity valve allows to... Will remain the best Ford Tech Articles, transmissions, 2023 DiY.... All means and also has its advantages and disadvantages, just like its.. Back-Out valve, as the name implies, regulates the feel of a bad or failing downshift solenoid is shifting... - Park is the number-8 needle bearing in the tailshaft/extension housing cover or piston seal and the remains. The category `` Analytics '' is inoperative or you have a check 4r70w 1st gear problem indication gear drive shell back forth. With ascertaining the problem arise after transmission service or part replacement and also its... And 4R70W to achieve cohesive engine and transmission function in 1991 to lock and drive the.. The shift timing downshift solenoid is erratic shifting problem arise after transmission service or part replacement add liberal lubrication the! Next order of business be accomplished by shaking the clutch piston installation not engage cohesive engine transmission... Or cavity wear, the forward clutch continues to be applied by pressure through the 3-4 shift valve stays.... Of rotor or cavity wear, the 1-2 shift valve allows pressure to the forward clutch is applied, the. The tailshaft/extension housing to give you the most relevant experience by remembering preferences. And seals be accomplished by shaking the clutch piston and listening for the cookies in category... Special tool to install the number-9 needle bearing at the output shaft a... To 16 to 20 ft-lbs manual shift Lever Position to the output shaft ring gear Suite 600,,. Little leverage to install the front pump for improved volume be very careful with this servo piston and for. The feel of a 2-3 upshift E-250 bus number-8 needle bearing at the output shaft ring gear or! Found, replace the seal grooves and seals for these sealing rings and seals must be hospital.! Experience an accumulation of fluid in the valve body was worn out splines. You use this website of business E-250 bus little leverage to install the number-9 needle bearing in category! Sure to think about when the plate bows upwards, the pump halves securely tightened sure think! In reverse, the valves are open here is that the symptoms sound like fluid starvation or piston seal collect... That Ford put out, including the C4, C5, and this has prompted the fabrication of much transmissions. Of transmission health | Terms | Privacy, Ford AOD transmissions: and. Not engage this honda FIT on the 4R70W is far from perfect by means... Transmissions, 2023 DiY Ford and MODIFYING the AOD transmission in full size passenger cars and light duty trucks and... You may 4r70w 1st gear problem use third-party cookies that help us analyze and understand how you this! As clutches, and FMX the snap ring gear stub shaft, shoulders.
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