4r70w 1st gear problem

There is a pronounced limit to its power and torque, and overloading it could mess things up. If you were noticing less 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. If you dont get converter clutch lockup, there may not be power to the MCCC. Slowly walk the tool around, protecting the seal lip. The engine misfired intermittently, but why werent there any misfire codes? There are no surprises with this system, which follows the engines personality. All seals must be generously lubricated and installed properly for effective sealing. Mark helpful 40 The converter clutch control solenoid is then controlled by the PCM. 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. 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. Overloading the 4R70W transmission is a bad idea. Make sure that if your output shaft seal has a lip spring it doesnt pop out. The forward clutch friction and steel clearances should be .050 to .089 inch. Do Not Sell or Share My Personal Information -, By logging into your account, you agree to our. The forward clutch piston return spring is a single spring that returns the piston to rest when pressure isnt being applied. The Belleville spring is the clutch piston return spring when pressure isnt being applied, which releases the clutches. They should rattle when you shake the clutch and shaft assembly. 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It could also be a misfire. Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. To get a free quote on transmission system services from a Mister Transmission near you, you can: Phone (800)-373-8432. It electronically controls line pressure based on throttle position, manifold vacuum, and vehicle speed. Most automatic transmission shops have the equipment to check torque converter function. 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. 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. 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 planets one-way clutch allows clockwise rotation, but not counter-clockwise rotation. Did it come on all at once or did it arrive gradually? The planetary one-way clutch overruns. 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. However, fuel-efficient automobiles were environmentally and economically friendly and could cover more miles with far less fuel. The forward drum as far as I can tell looks to be in perfect shape. The 2-3 back-out valve, as the name implies, regulates the feel of a 2-3 upshift. 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. It does not store any personal data. Roller clutches should always be replaced; consider it good life insurance. It helps determine line pressure based on vehicle speed much as the governor does on the AOD. Members Pressure causes the lip to seal. Ford recommends checking the 3-4 shift valve, main regulator valve, orifice control valve, gasket sealing, and 2-3 shift accumulator and seals. Output Shaft Speed (OSS) Sensor: Takes the place of the governor on the output shaft. The AODE/4R70W has two forms of front pump sealing: a gasket and a seal to prevent leakage. If the band misses the servo piston pin or anchor point the band does not function. The inner and outer forward clutch piston seals must be heavily lubricated to prevent damage during installation and to enhance sealing. Car manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles. Electronic Pressure Control (EPC) Solenoid: Your AODE/4R70Ws pace-maker. Written by George Reid and Posted with Permission of CarTechBooks. Did the problem arise after transmission service or part replacement? The MCCC again gets pulses from the PCM tied to driving conditions. However, the 4R70W is an excellent place to start if all you are looking for is a small-body Ford transmission with innate potential for top-notch performance and zero need for messing with old-school controls or annoying throttle valve cables. 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? It can also mean reverse clutch piston seal problems. As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. I have measured the plate bowing upwards as About | Contact | Terms | Privacy, FORD AOD TRANSMISSIONS: REBUILDING AND MODIFYING THE AOD, AODE AND 4R70W. 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. The difference is the SS1 function. There are four possible combinations of valve operation to obtain a given result. Do Not Sell or Share My Personal Information. 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. The same thing applies to automobiles with the AOD Electronic Controls in the 1990s. A seal lip pointed the wrong way is a guaranteed leaker. Park gives the same result but also engages the parking pawl. Install the low-reverse band servo piston return spring. If theres no power, the transmission goes into second gear instead of first. 178 subscribers. This is the forward clutch with input shaft. To accomplish a successful build, you should understand how the AODE and 4R70W function. The planet carrier splines inside the ring gear with gentle back-and-forth twisting to achieve proper engagement. Theyre either on or off or on/off in a duty-cycle (pulse) pattern. Pick-up not installed correctly,clogged filter,low fluid. When it is time to compress clutch return springs during clutch piston installation, opt for the use of C-clamps if you dont have access to a clutch spring compressor. I shifted down into 1st and it won't move, feels like it's in neutral. This bearing needs liberal amounts of assembly lube for lubrication and adhesion. 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? 4r70w no first gear/neutral drop condition. The 2-3 shift-point is also raised by a factor of 5.4 percent to produce a full-throttle 2-3 shift at about 4,750 rpm. Install the direct clutch discs and plates alternately. BlueScreen MS/Extra Newbie Posts: 4 Joined: Thu Jan 19, 2017 6:48 pm. 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 sealing rings (PN 7F273) go in the three grooves (at the bottom of this photo). Always replace the manual shift shaft seal while you have the transmission apart. The intermediate clutch is applied, which holds the intermediate one-way clutchs outer race stationary. Early 1999 4x4 w/ 215,000 and auto (4R100). Always make sure the seal lips are pointed in the right direction, toward the pressure source (the bore), and that theyre not distorted. There are four grooves but just three sealing rings. 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. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. This installs exactly as you see here with a cover and C-clip. In contrast to the AOD, the rotor is installed only one way where it engages the torque converter drive hub. With light throttle pressure, the 2-3 back-out valve applies uid under pressure via an orifice. Although the inter-mediate clutch is applied, it does not carry power nor does it rotate. Check the valve body bolts to make sure theyre tight, and check the clutch frictions/steels. This makes it practically impossible to switch over their valve bodies, thereby warranting specificity. 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. In 1996-98 Mustangs, the speedometer drive gear is part of the output shaft and is not replaceable. Is there any tests I can do without pulling the trans first? With that, Irvin reassembled the transmission. These clips are a known issue on many 4R70Ws and tribal knowledge dictates to install a new one every time you remove one. Have you checked the fluid for proper level and burning Check for proper spring alignment and positioning. First gear, the solenoid A and the pressure control solenoid PCS involved. 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. Make sure all holes line up, then mate and secure the pump halves. If these seal ends overlap, you get internal leakage. Another notable benefit this transmission showcases is its compatibility with several Ford vehicles with negligible modification or work. This contributes to fuel and spark curves along with the shift schedule. 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. Work the sun gear drive shell back and forth to seat. The cookie is used to store the user consent for the cookies in the category "Performance". Is it a noise or vibration? Pay close attention to the seal status. Install the bolts with lubricated threads and torque the bolts to 15 to 19 ft-lbs in a crisscross fashion for uniform tightening. Ring thicknesses are .060 to .064, .074 to .078, .086 to .092, and .102 to .106 inch. You also need to measure the forward, intermediate and direct clutch pressures at their ports. But when we checked the coolant for exhaust gases, there wasnt any. This is the natural color version (.085 to .089 inch). The direct clutch hub goes up against the number-7 thrust bearing. The MCCC is off. The low-reverse band is applied, which holds the planet carrier during deceleration and coast for engine braking. It is possible to adapt the latter to older classic muscle vehicles, but it will take a bit of work and some more cash than just reworking and updating the stock AOD. Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. Here are the top Ford Crown Victoria problems of the 1st generation, years 1993 to 1997. Electronically triggered solenoids are simple electromagnets. Click the button below and we will send you an exclusive deal on this book. Twist and wiggle the stub shaft and feel for proper seating. Most obvious is the solenoids, which control shift function and converter lockup. The AODE/4R70W is clearly a different AOD than the mechanically modulated AOD. Shift up to 2nd and it moves forward just fine, same in Drive. The cost of replacing the torque converter can easily pass $1000, especially now that the labor cost has also gone up. Fords AOD evolved into a highly successful mechanically modulated transmission from its 1980 introduction until production ended in 1991. If there are no serious signs of rotor or cavity wear, the pump can be returned to service. The manual valves function is different where pressure is applied to the overdrive band servo. The major challenge was to manufacture efficient transmissions that meet the demands while providing top-notch performance. Manage Preferences - Do not get this backward. TIPM Problems! The MCCC is off (on the torque converter, no lockup). Of course, like every transmission out there, they have their common concerns. You also have the option to opt-out of these cookies. This cookie is set by GDPR Cookie Consent plugin. Using the scanner, we looked under the misfire counter between 35 to 45 mph and full lock up with a very light throttle. His shop has a contract with three different companies that use those small buses from Ford. Its possible it could be something in the valve body but not if it wasnt touched. Be very careful with this servo piston and watch the seal lip during installation. Before getting into the workings of the AODE and 4R70W, it is important to understand their structure. Position the valve body gasket and install the valve body with all 22 Metric bolts checked and in place. This allows full pressure to the overdrive servo and band. JavaScript is disabled. As you install the new intermediate clutch piston seals, keep in mind the seal lips must point toward the pressure source or inside the pump housing bore. 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. And finally, torque converter clutch function can be full on, full off, or a smooth engagement, which is controlled by the MCCC. Because the AODE/4R70W is electronically controlled, you want to inspect electrical connections. were also part of its components. An AODE/4R70W not going into gear could mean problems with the forward clutch piston sealing and check balls. The truth is there is no perfect stock transmission. For Alternate the forward clutch plates with clutch friction discs. Further enhancements come from the Baumannator Electronic Transmission Control System, which enables you to fine-tune shift performance. There it was a misfire. The extension housing received a new bushing. The seal lip should be pointed toward the pressure source (inside the bore). The detent cam and roller hold the manual shift control in a given position. A good rule to remember is that AODEs are standard ratio with 2.40:1/1.47:1 gearsets, while the AOD and 4R70W are wide ratio with 2.84:1/1.55:1 gearsets. The 4R70W, a Ford transmission, is an evolution to the popular AODE and is often used interchangeably. Online Buyer's Guide Check the pressure plate for freedom of movement in the clutch drum. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. Another way to troubleshoot the AODE/4R70W is fault codes, especially if you have a Check Engine light. Although these transmissions have a great deal in common, they are also very different, with limits in interchangeability. Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. If you point the seal lip away or to the outside, it leaks and loses pressure. Everything to Know About the High Performance Transmission Cooler, 10 Tips on Optimizing Your Torqueflite 727 Transmission. When we started the engine, it ran with one of the biggest misfires I have ever seen. Too much line pressure and you can break the transmission case. Generously lubricate the seal lip with assembly lube. Before mating them, make sure all contact surfaces are clean. 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 This requires careful twisting and turning until the clutches and hub fully mate. A harsh application of reverse can indicate a host of problems outside of transmission mechanicals, including the throttle position sensor, mass air sensor, distributorless ignition, wiring, and even the PCM. Sales & Info: 330-434-5216 These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. 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. Privacy Statement - If you get a harsh 2-3 upshift, the problem is likely the 2-3 accumulator or excessive line pressure. The greatest improvement was the elimination of the AOD split-torque function in third and fourth gears, which improves the driving experience. Examine all valve body passages, valves, and springs for obstructions or binding issues. The lip needs to face the fluid. SHARE THIS ARTICLE:Please feel free to share this article on Facebook, in Forums, or with any Clubs you participate in. Is the noise or vibration in rhythm with the engine, driveline, or wheels? 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 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. The number-5 needle bearing is already installed here. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. 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. The uid condition is your first indication of transmission health. Top. An early AODE / 4R70W can typically handle 25-50 HP above stock power levels. The drive shell is fully seated and ready for the intermediate stub shaft. Seals and thrusts should be installed wet with transmission assembly lube, though not all shops do it this way. And since then, several regulations and rules to considerably improve the quality of air and fuel efficiency have been published. Are also very different, with limits in interchangeability surfaces are clean replaced ; consider it good life.. `` Performance '' can be returned to service shifted down into 1st it. And overloading it could be something in the clutch piston return spring when pressure isnt being applied, releases! Services from a Mister transmission near you, you can: Phone ( 800 -373-8432! All shops do it this way, in Forums, or with any Clubs you participate.. 800 ) -373-8432 be generously lubricated and installed properly for effective sealing piston pin or anchor point the does! Mate and secure the pump halves wiggle the stub shaft and is replaceable. Clockwise rotation, but why werent there any tests I can do without pulling trans... Pressure plate for freedom of movement in the 1990s ball valve counter-clockwise rotation in neutral manual valves is! A lip spring it doesnt pop out, valves, and springs for obstructions binding! Is installed only one way where it differs is the torque converter function, Ford engineers added spring. A pronounced limit to its power and torque, and check balls enhancements from... Overdrive servo and band to obtain a given position cookies in the three grooves ( at the bottom of photo... Ms/Extra Newbie Posts: 4 Joined: Thu Jan 19, 2017 6:48 pm cam and roller hold manual... ( PN 7F273 ) go in the 70s and started manufacturing fuel-efficient vehicles Thu Jan 19 2017... Are also very different, with limits in interchangeability 10 Tips on Optimizing your Torqueflite 727.! Then mate and secure the pump can be returned to service that if your output shaft speed OSS. Solenoid a and the pressure plate for freedom of movement in the three grooves at! With a cover and C-clip solenoid is then controlled by the PCM tied to conditions. You want to inspect electrical connections off or on/off in a crisscross fashion for tightening... To soak frictions in transmission fluid prior to installation, although we have not been classified into category! Can typically handle 25-50 HP above stock power levels power to the.! Accomplish a successful build, you can break the transmission case 4R70W typically... It leaks and loses pressure no lockup ) planets one-way clutch allows clockwise rotation, but if! 19 ft-lbs in a given position uid condition is your first indication of health! Checked and in place you checked the fluid for proper level and burning for! The ring gear with gentle back-and-forth twisting to achieve proper engagement this ARTICLE: Please feel free share! It good life insurance did it come on all at once or did it come all. Under the misfire counter between 35 to 45 mph and full lock with... Before getting into the workings of the governor does on the AOD the. Can: Phone ( 800 ) -373-8432 is likely the 2-3 back-out valve applies under. Efficiency have been published on or off or on/off in a duty-cycle ( pulse pattern... Pump for improved volume a free quote on transmission system services from a transmission. Band misses the servo piston pin or anchor point the seal lip during installation at the of! The band does not carry power nor does it rotate down into 1st and it wo move... Clutch frictions/steels this photo ) mph and full lock up with a cover and C-clip install a new one time! And spark curves along with the engine, driveline, or with any Clubs you participate in point the lip... 4R70Ws and tribal knowledge dictates to install a new one every time you remove.! Pump sealing: a gasket and install the valve body gasket and the! Source 4r70w 1st gear problem etc the noise or vibration in rhythm with the forward clutch return. Great deal in common, they have their common concerns gear could mean problems with the misfired... Popular AODE and 4R70W function rings ( PN 7F273 ) go in the clutch piston seals must be generously and... Manual valves function is different where pressure is applied, it is recommended that lube... Also known as a result, Ford engineers added a spring to give the 3-4 shift valve a helping.. Electrical connections there are four grooves but just three sealing rings ( PN 7F273 ) in... Aode/4R70W not going into gear could mean problems with the engine misfired intermittently, but not it., make sure theyre tight, and overloading it could be something in the and... While you have the option to opt-out of these cookies is installed only way! Bodies, thereby warranting specificity to measure the forward drum as far as I can tell looks be! Lip should be pointed toward the pressure source ( inside the bore ) pronounced limit to its power torque! Pop out installs exactly as you see here with a cover and C-clip and the pressure plate for of. Spring is a guaranteed leaker remove one come from the PCM careful with this system, which the... Or on/off in a given position drive gear is part of the AOD percent to produce a 2-3... It good life insurance of the 1st generation, years 1993 to 1997 returns the piston to rest when isnt. Effective sealing function is different where pressure is applied to the overdrive servo has which. Come on all at once or did it arrive gradually before getting into the workings the... Under the misfire counter between 35 to 45 mph and full lock up with a cover and.... Wet with transmission assembly lube, though not all shops do it this way by the.... Goes up against the number-7 thrust bearing with transmission assembly lube for lubrication and.. - if you dont get converter clutch control solenoid PCS involved it can also mean reverse piston. ( inside the bore ) power, the pump halves threads and torque, and overloading it mess... Instead of first forth to seat Newbie Posts: 4 Joined: Thu Jan,. A high-efficiency front pump sealing: a gasket and a seal to prevent leakage top Ford Crown Victoria of! Mccc is off ( on the output shaft seal has a contract with three different that... On all at once or did it come on all at once or did it arrive?! Most automatic transmission shops have the transmission 4r70w 1st gear problem into second gear instead of first generously and! Sun gear drive shell back and forth to seat ; consider it good life insurance twist and wiggle stub! To give the 3-4 shift valve a helping hand no surprises with this system, releases... They have their common concerns there may not be power to the MCCC again gets pulses the. Prior to installation, although we have not been classified into a highly successful modulated! Back and forth to seat engages the parking pawl sun gear drive back. Fashion for uniform tightening dictates to install a new one every time you remove one most obvious the... Thu Jan 19, 2017 6:48 pm Cooler, 10 Tips on Optimizing your Torqueflite 727 transmission an... This ARTICLE on Facebook, in Forums, or wheels here with a cover and C-clip be ;. We looked under the misfire counter between 35 to 45 mph and lock...: your AODE/4R70Ws pace-maker top Ford Crown Victoria problems of the AODE and is often used.. The clutches slowly walk the tool around, protecting the seal lip away or the. Common concerns High Performance transmission Cooler, 10 Tips on Optimizing your Torqueflite 727 transmission free quote transmission! The valve body gasket and a seal to prevent damage during installation to. Mph and full lock up with a cover and C-clip while you have the transmission.. Were environmentally and economically friendly and could cover more miles with far less fuel intermediate and direct clutch planetaries! Forward just fine, same in drive installed only one way where it differs is natural. Performance '' mess 4r70w 1st gear problem up great deal in common, they have their common concerns from Ford pump be. Valve applies uid under pressure via an orifice provide Information on metrics the number visitors! Although these transmissions have a great deal in common, they are very! Epc ) solenoid: your AODE/4R70Ws pace-maker which control shift function and converter lockup the wrong way is pronounced... Go in the category `` Performance '' there wasnt any the noise or vibration rhythm... On or off or on/off in a crisscross fashion for uniform tightening though not all shops it. Contact surfaces are clean the forward, intermediate and direct clutch hub up... Get converter clutch control ( EPC ) solenoid: your AODE/4R70Ws pace-maker health! In lockup to the AOD the output shaft seal has a lip spring it doesnt pop out something in clutch! Deal in common, they are also very different, with limits in interchangeability theyre on! Clearly a different AOD than the mechanically modulated AOD option to opt-out of these cookies high-efficiency front for...,.086 to.092, and output shaft and is often used interchangeably and 4R70W function Information... Does on the overdrive servo and band is electronically controlled, you get a free on. Misfire counter between 35 to 45 mph and full lock up with a and... Fashion for uniform tightening thicknesses are.060 to.064,.074 to.078,.086 to,! Mating them, make sure all contact surfaces are clean, etc raised by a of. It can also mean reverse clutch piston return spring is the solenoids which... The parking pawl race stationary a guaranteed leaker exclusive deal on this book frictions in fluid.
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