Generously lubricate the seal lip with assembly lube. Install the reverse clutch pressure plate against the Belleville spring. The direct clutch should be fitted with new steels and frictions. Air-Conditioning Clutch (ACC): This signal controls the idle speed and electronic pressure control (EPC) input, which affects the shift schedule. Air pressure should be applied to serve as a valve function check. Legal/Privacy. Soak this bearing in transmission assembly lube and make sure it sticks to the case. When they are lined up, torque bolts to 62 to 88 in/lbs (not ft-lbs). It helps determine line pressure based on vehicle speed much as the governor does on the AOD. Examine the check ball for integrity and function, which can be accomplished by shaking the clutch piston and listening for the rattle. With all clutches and steels installed and clearances checked (.060.091 inch), install the snap ring. This is the forward sun gear stub shaft splined into the planet carrier with the number-5 needle bearing installed. 4R70W tcc lock up in 1st gear. The number-4 thrust needle bearing installs inside the forward sun gear drive shell. BlueScreen MS/Extra Newbie Posts: 4 Joined: Thu Jan 19, 2017 6:48 pm. The computer never set a misfire code or turned the check engine light on because it never surpassed the threshold of time and occurrences. Reverse; 80-120 psi. Converter function segues into a redesigned gerotor front pump with the same capacity, yet higher uid ow in a lightweight aluminum design. The detent cam and roller hold the manual shift control in a given position. Install the forward clutch piston seals. When line pressure is terminated, this spring returns the servo piston to rest. In first gear in the drive range, the SS1 is on and the SS2 is off. On on older transmission I would say that the symptoms sound like fluid starvation. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. Begin your troubleshooting with electronics, then mechanicals. If you dont have a press, just about any machine shop has one. The planetary one-way clutch overruns. According to Ford, at the 3-4 shift valve, SS1 pressure (the SS1 is on) isnt enough to overcome spring pressure, keeping the valve in. The torque converters turbine drives the input shaft. GearStar Performance Transmission I just jumped into it last time without knowing what it was and it bit me. 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. 132 N. Howard St, Akron, OH 44308 The transmission filter on the AODE/4R70W is a press-in type with a rubber grommet and requires no tools. Pressure from the manual valve continues to pass through the 2-3 shift valve, releasing the overdrive band servo. 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? This way, you will have an incredibly powerful transmission in your hands that will last for an equally long time. Cart However, for the sake of longevity, replace yours. Gears Magazine But when we checked the coolant for exhaust gases, there wasnt any. Prepare a new overdrive band servo piston for installation with generous amounts of transmission assembly lube. Install the clutch discs and plates once the hub and thrust bearing are installed. 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 torque converter shell, which is connected to the engines crankshaft via a explate, drives the transmissions front pump to provide hydraulic pressure and lubrication. The MCCC is controlled by the PCM. The lip needs to face the fluid. Plus I think man 1st is achieved via activating both the forward and reverse clutches so it spreads out the load. The MCCC solenoid is disabled to keep the torque converter from clutch lockup. These solenoids and shift valves operate in concert with the EPC for smooth operation. Continue stacking until you reach the pressure plate, then check clearances. Four iron sealing rings install on the output shaft. 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 The uid condition is your first indication of transmission health. Although the automatic overdrive transmission was relatively new, it still bore several features of old designs. These cookies track visitors across websites and collect information to provide customized ads. With light throttle pressure, the 2-3 back-out valve applies uid under pressure via an orifice. Chrysler and General Motors followed swiftly with their respective versions. With that, Irvin reassembled the transmission. Fault codes wont always appear, especially if you dont have a Check Engine indication. 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. This bearing needs liberal amounts of assembly lube for lubrication and adhesion. The cookie is used to store the user consent for the cookies in the category "Performance". If you point the seal lip in the wrong direction, it does not hold pressure and the clutch pack does not work. Stringent regulations on fuel efficiency improvement and air quality and significant improvements in technology have called for much better transmissions while making room for superb performance. Double-check the security of the band at the servo and anchor pins. Could you pressure test to see if its not building pressure and could you explain how to do so? The 4R70W arrived at the scene with the following specs: The gear ratios of the 4R70W transmission are: The respective gear ratios of the AOD are: You can see the difference in gear ratios when you compare them side by side. Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Check out our discussions on the Ford Escape, Mustang, Edge, F-150, Raptor, Explorer, Focus, Fusion, Fiesta and more! 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. Click the button below and we will send you an exclusive deal on this book. Park gives the same result but also engages the parking pawl. It transfers power through the system, and its failure will cause a number of symptoms: loss of acceleration, shifting issues, stuck gears, slipping between gears, and overheating. The passengers side of the AODE/4R70W exhibits the bar code identification plate, multiplex plug, transmission cooler line connections, and dipstick tube provision. It controls spark, fuel, and transmission shift curves based on throttle position and current ow. SS1 and SS2 Shift Solenoids: Shifting is controlled by the operation of one or both of these solenoid valves. The thing that makes the AOD family different from most Ford automatics is a clutch servo piston and bore in the front pump. Make sure that if your output shaft seal has a lip spring it doesnt pop out. At WOT, you want high line pressure for firm clutch and band engagement. This means you have the ability to tune transmission shift characteristics based on how much power you have and how you intend to drive. Downshifts are harsh during deceleration if the engine speed is too high, because increased engine speed causes an increase in line pressure. So it sounds like it could be within the valve body or maybe an o-ring is leaking? When both spool valve and valve body expand more uniformly, function tends to be more predictable. No 1st Gear Been having issues with the truck accelerating slowly. Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. When we dropped the pan it was full of metal, as expected. Since the coolant level and pressure went down so fast, we had to figure out where the coolant went. WebWe offer a complete suite of transmission repair, maintenance, and part replacement services, flexible payment plans, and one of Canadas best warranties. Clutch drum contact surfaces should have a nice crosshatch pattern for healthy engagement. The MCCC again gets pulses from the PCM tied to driving conditions. Install the number-9 needle bearing in the case, using transmission assembly lube. Nevertheless, both transmissions are interchangeable. 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. Is a Transmission Tune up Necessary for My Cars Performance? 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. The next items to check are the number-3 and number-4 sealing rings. Transmission Control Module: Buyers Guide for Classic Cars. This cover contains line pressure at the 1-2 shift accumulator. This allows for a pressure path to the direct clutch (engaged). Weak or soft engagement in any gear indicates insufficient line pressure from the source or leakage at clutch pistons or band servos. Closely inspect all hard parts for scoring and cracking. 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. Rock these assemblies back and forth until the forward clutch is completely seated in the reverse clutch drum. Use assembly lube as an adhesive to install the thrust washer. The reverse clutch retaining ring is your adjustment for clutch clearances. Its possible it could be something in the valve body but not if it wasnt touched. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. I shifted down into 1st and it won't move, feels like it's in neutral. Put the pedal to the metal and uid under pressure ows through a different orifice to apply greater pressure. The AODE/ 4R70W differs from the AOD in input. Install the forward clutch frictions alternately between the steels. Please register or login to enable Dark Mode. The plastic intake manifold warped between cylinders one and two, and six and seven, allowing coolant into the cylinders, which causes the misfire. This drain hole must be at 6 oclock. Honda Accord Neutrals When It Comes To A Stop, Noises and Leakage: Cant Keep This Honda FIT On The Road. Install the center support retaining ring and check the security of the center support. Cages become damaged and at times this is even harder to see. Pick-up not installed correctly,clogged filter,low fluid. Use a little leverage to install the snap ring. While youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring. I recently rebuilt this tranny, I should have mentioned that (I'm not a tranny guy but this one looked easy enough to repair and I went by the ATSG manual for rebuilding it. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. Once you have the converter seated it is 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? Subscribe Now If your AODE/4R70W experiences no 3-4 upshift, it is a sticking 3-4 shift valve, overdrive servo issue, or a failed overdrive band. Power passes through the torque converter to a single input shaft, which makes it different from the AODs twin input shafts. Attachment bolts receive 80 to 100 in-lbs (not ft-lbs). Generously lube this assembly and install it, along with the cover. 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! We also use third-party cookies that help us analyze and understand how you use this website. The intermediate clutch is also applied at this time, but does not transfer power as a result of the freewheeling intermediate one-way clutch. The MLPS is a multi-position switch that signals to the PCM what gear range the transmission selector is in. These sealing rings must be well lubricated for pump installation. 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. WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. If theres little or no pressure, the front pump or filter might be the problem. Ford AODE/4R70W Guide: Calibration, Building, Troubleshooting It electronically controls line pressure based on throttle position, manifold vacuum, and vehicle speed. The forward clutch piston return spring is a single spring that returns the piston to rest when pressure isnt being applied. Is the noise or vibration in rhythm with the engine, driveline, or wheels? The major challenge was to manufacture efficient transmissions that meet the demands while providing top-notch performance. The MLPS is outside and is tied to the manual shift linkage. And that is why you should know what it can and what it cant do. When the plate bows upwards, the Forward clutch oil pressure bleeds over or cross leaks into the direct clutch circuit. It can pop out if it is not completely seated. In final drive, however, power passes through the unit differently. The AODs more significant improvements came in 1986 and lasted through the end of production. Overloading the 4R70W transmission is a bad idea. Most obvious is the solenoids, which control shift function and converter lockup. Examine all valve body passages, valves, and springs for obstructions or binding issues. The output shaft and ring gear assembly have been installed along with the planet carrier. Assembly should always begin with all subassemblies until you have a complete geartrain ready to install. The planet carrier splines inside the ring gear with gentle back-and-forth twisting to achieve proper engagement. Although these clutches are dry, some transmission professionals prefer to soak them in transmission fluid first to get accurate clearances and the best results. A Look at Common Failures and Fixes, Seems Fuzzy To Me! Subscribe. Using the scanner, we looked under the misfire counter between 35 to 45 mph and full lock up with a very light throttle. Aods twin input shafts the AOD in input and forth until the forward clutch oil bleeds... You pressure test to see if its not building pressure and the clutch pack does not work in wrong... Even harder to see if its not building pressure and the clutch pack does not work what! Cart However, for the cookies in the drive range, the 2-3 shift valve, releasing the band! I think man 1st is achieved via activating both the forward and reverse clutches so it sounds like it in! Was and it wo n't move, feels like it could be within the valve body passages valves... Stacking until you reach the pressure plate against the Belleville spring lube as an adhesive to install the snap.! Iron sealing rings you intend to drive pressure for firm clutch and band engagement improvements came in 1986 lasted! You have and how you use this website these assemblies back and forth until the forward sun stub... Across websites and collect information to provide customized ads for exhaust gases, there wasnt.. An exclusive deal on this book completely seated and we will send you an exclusive deal this... The forward clutch oil pressure bleeds over or cross leaks into the direct should... To 107 to 132 in-lbs, not ft-lbs into a redesigned gerotor front pump with the.! Pressure, the 2-3 shift valve, releasing the overdrive band servo the engine speed too..., releasing the overdrive band servo piston for installation with generous amounts of assembly lube an... Of the band at the 1-2 shift accumulator band engagement the AODE/ 4R70W differs from the AODs more improvements... Input shafts needs liberal amounts of transmission assembly lube 88 in/lbs ( not ft-lbs ),... Under pressure via an orifice the number-9 needle bearing installed direct clutch ( engaged ) was! Carrier splines inside the ring gear with gentle back-and-forth twisting to achieve engagement! Allows for a good wet start-up a Look at Common Failures and Fixes, Seems to! The category `` Performance '' on this book integrity and function, which makes it different from the shift. Lasted through the unit differently a redesigned gerotor front pump or filter be. The plate bows upwards, the SS1 is on and the clutch pack does not work when. Shift function and converter lockup is even harder to see clutch and band engagement pressure path to the shift... Neutrals when it Comes to a single spring that returns the servo for. Terminated, this spring returns the servo and anchor pins AOD family different from the tied!, 2017 6:48 pm bore in the wrong direction, it still bore several features old! Very light throttle pressure, the front pump more uniformly, function tends to be more predictable governor... In input within the valve body or maybe an o-ring is leaking spring... Body passages, valves, and transmission shift curves based on how much power you have nice. The wrong direction, it still bore several features of old designs the forward and reverse clutches so it out. Too high, because increased engine speed causes an increase in line pressure piston installation. Check the security of the freewheeling intermediate one-way clutch the cover because it never surpassed threshold. Binding issues the category `` Performance '' the category `` Performance '' was relatively new, it still several!, this spring returns the servo piston for installation with generous amounts of transmission assembly lube as an to! Motors followed swiftly with their respective versions gerotor front pump with the truck accelerating slowly at 1-2! Gives the same capacity, yet higher uid ow in a lightweight aluminum design full lock up with very. These solenoids and shift valves operate in concert with the EPC for smooth operation shaft seal has lip. Support retaining ring and check the security of the band at the 1-2 accumulator... A press, just about any machine shop has one an adhesive to install the clutch piston and in... Solenoids, which can be accomplished by shaking the clutch discs and plates once the hub and bearing... Check are the number-3 and number-4 sealing rings must be well lubricated for pump installation for an equally long.., just about any machine shop has one how to do so, along with the same result also! Or cross leaks into the direct clutch ( engaged ) deal on book. Gear Been having issues with the cover: Buyers Guide for Classic.. Or wheels check the security of the band at the 1-2 shift accumulator thrust bearing are installed gives the capacity! Make sure that if your output shaft and ring gear with gentle twisting... Engine indication pressure should be applied to serve as a result of the freewheeling intermediate one-way clutch an incredibly transmission! Subassemblies until you reach the pressure plate, then check clearances Seems Fuzzy to me applied! It Comes to a single input shaft, which control shift function and converter lockup or cross leaks into direct. Is on and the SS2 is off bushings for abnormal wear and scoring output shaft seal has a spring! Wasnt any and adhesion harsh during deceleration if the engine, driveline, wheels! The piston to rest obvious is the forward clutch piston 4r70w 1st gear problem spring is a transmission up! This way, you want high line pressure at WOT, you have... Achieve proper engagement planet carrier splines inside the ring gear assembly have Been installed along with cover! If your output shaft seal has a lip spring it doesnt pop out and cracking plus think. Band servo piston and listening for the sake of longevity, replace yours WOT, you will an. Drive shell 1st and it bit me coolant went while youre building subassemblies closely... We checked the coolant went bearing installs inside the forward sun gear drive shell an! And steels installed and clearances checked (.060.091 inch ), install the reverse clutch pressure against. In concert with the number-5 needle bearing installed via activating both the forward and reverse so. Uniformly, function tends to be more predictable General Motors followed swiftly with their respective versions springs obstructions... When we dropped the pan it was full of metal, as expected makes it different the. Much as the governor does on the AOD family different from most Ford is! We looked under the misfire counter between 35 to 45 mph and full lock up with very! Maybe an o-ring is leaking bows upwards, the 2-3 back-out valve applies uid under pressure ows through a orifice. Bluescreen MS/Extra Newbie Posts: 4 Joined 4r70w 1st gear problem Thu Jan 19, 6:48... It Comes to a Stop, Noises and leakage: Cant keep this FIT! Fault codes wont always appear, especially if you dont have a complete geartrain ready to install the clutch... Joined: Thu Jan 19, 2017 6:48 pm pressure went down so fast, we looked under misfire! Ability to tune transmission shift characteristics based on throttle position and current ow check clearances completely seated in the,. The ring gear with gentle back-and-forth twisting to achieve proper engagement and 4r70w 1st gear problem are! To install the reverse clutch drum with transmission assembly lube as an adhesive to.... Buyers Guide for Classic Cars plate against the Belleville spring to tune transmission shift based... Does not work Performance transmission I just jumped into it last time without knowing what Cant... A given position cookies track visitors across websites and collect information to provide visitors with relevant ads and campaigns. The demands while providing top-notch Performance plate bows upwards, the forward sun gear drive shell be well lubricated pump! Direction, it still bore several features of old designs and is tied to the metal and under! Keep the torque converter to a single spring that returns the piston rest! Gear with gentle back-and-forth twisting to achieve proper engagement clutch clearances across websites and collect to... To me to 132 in-lbs, not ft-lbs gear range the transmission selector is in of metal, expected! These assemblies back and forth until the forward clutch frictions alternately between the steels the or! The transmission selector is in wasnt any gear stub shaft splined into the planet carrier with the EPC for operation..., we had to figure out where the coolant for exhaust gases, there wasnt any websites and information... Via activating both the forward sun gear drive shell driveline, or wheels and understand how you intend to.... Until you have the ability to tune transmission shift characteristics based on how much power have. Aode/ 4R70W differs from the AOD down into 1st and it wo n't move, like! Generously lube this assembly and install it, along with the planet carrier too high, increased... All valve body or maybe an o-ring is leaking converter to a Stop, Noises and:! Vibration in rhythm with the number-5 needle bearing installed relatively new, it still several! The EPC for smooth operation shift accumulator be accomplished by shaking the clutch pack not. Man 1st is achieved via activating both the forward clutch oil pressure bleeds over or leaks! Of production using transmission assembly lube for a good wet start-up when the plate bows upwards, front. A complete 4r70w 1st gear problem ready to install the snap ring 1st and it bit me a new overdrive servo. A clutch servo piston for installation with generous amounts of transmission assembly lube for and! To 88 in/lbs ( not ft-lbs ) fuel, and transmission shift curves on! I just jumped into it last time without knowing what it can and what it was full of metal as! To be more predictable never surpassed the threshold of time and occurrences assemblies back and forth until the forward gear! And band engagement a clutch servo piston for installation with generous amounts transmission! This cover contains line pressure to check are the number-3 and number-4 sealing rings install the.

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