Band assemblies, such as clutches, can be installed wet or dry. When they work properly, the 4R70W and 4R75W is a reliable transmission. This means you have the ability to tune transmission shift characteristics based on how much power you have and how you intend to drive. I have measured the plate bowing upwards as It also means theres no pressure to the intermediate clutch pack. All of these items are checked by dropping the valve body and visually inspecting them. To reduce vehicle weight and improve fluid cooling, Ford gave the AODE/4R70W an aluminum front pump that offers greater volume to keep up at lower engine speeds. Attachment bolts receive 80 to 100 in-lbs (not ft-lbs). Begin your troubleshooting with electronics, then mechanicals. The SS1 is also on at this time, with both the SS1 and SS2 energized with combined pressure to move the 3-4 shift valve. Sometimes the MAF sensor causes transmission problems. I did replace scarf cut seals and made sure they went in properly. If you dont get converter clutch lockup, there may not be power to the MCCC. We also use third-party cookies that help us analyze and understand how you use this website. 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. 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 According to Baumann, all you need to do is install the F3LY-7B066-A intermediate pres-sure plate in any AOD or AODE, which enables you to add a single clutch friction disc for even better engagement. It electronically controls line pressure based on throttle position, manifold vacuum, and vehicle speed. It was not on the floor, so we figured the head gaskets were to blame. Others install them wet. These are the front pump stator support iron sealing rings, which are like piston rings in an engine. Using a spring compressor or C-clamps, compress the forward clutch piston return spring and install the retaining C-clip. However, after the unit got hot, the vehicle started to act up (but only after it sat for a little while). Engine braking is adversely affected in your AODE/4R70W if the overdrive band does not engage. 132 N. Howard St, Akron, OH 44308 How did the forward clutch drum look? 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. It has three alignment holes (slots). The direct clutch hub goes up against the number-7 thrust bearing. Make sure the old filter seal has been removed, which is an easy item to overlook. They should rattle when you shake the clutch and shaft assembly. For a better experience, please enable JavaScript in your browser before proceeding. Install the center support retaining ring and check the security of the center support. I would start by removing the valve body and inspecing it first. Dont forget to sign up for the ATRA seminar online and save money and time. The AODE/4R70W transmission has a high-efficiency front pump for improved volume. Check this ring carefully for proper seating. You can use C-clamps or a spring compressor to compress the springs and install a C-clip. The AODE and 4R70W are terrific factory transmissions that only get better with precise calibration and performance tuning. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. Bought it with a supposed rebuilt transmission, but apparently it wasn't all it was cracked up to be. 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. We also noticed it was misfiring when we took off from idle at 4 to 6 mph (Figures 2 and 3). 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. Air-Conditioning Clutch (ACC): This signal controls the idle speed and electronic pressure control (EPC) input, which affects the shift schedule. And since then, several regulations and rules to considerably improve the quality of air and fuel efficiency have been published. As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. You also have the option to opt-out of these cookies. The cookies is used to store the user consent for the cookies in the category "Necessary". The lip needs to face the fluid. Could have rolled a lip seal. Did it come on all at once or did it arrive gradually? Weak or soft engagement in any gear indicates insufficient line pressure from the source or leakage at clutch pistons or band servos. The forward sun gear drive shell rides against the number-5 needle bearing. If the transmission has never been apart, this information should be accurate in every detail. Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. Once pressure leaves the pump, its first destination is the manual shift valve, which is the traffic cop for line pressure. At WOT, you want high line pressure for firm clutch and band engagement. Also install the input shaft sealing rings at this time. This allows for proper seating and prevents warping. The MCCC is controlled by the PCM. During installation, watch the seals and protect them from distortion. In fourth/overdrive, the SS2 remains energized and the 2-3 shift valve stays put. Both shift solenoids, SS1 and SS2, are on/off function and packaged together. You dont need a special tool to install the low-reverse servo cover and snap ring. Install the low-reverse servo cover and snap ring. This retaining ring prevents the center support from wandering forward. When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). Its possible it could be something in the valve body but not if it wasnt touched. The AODE/4R70W employs a different main case and valve body along with an aluminum front pump and electronic control. 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. It was It should also be noted that the cases and valve bodies of the AOD, AODE, and the 4R70W, are different. Install the reverse clutch pressure plate against the Belleville spring. In second gear in drive range, both the SS1 and SS2 are off. Not enough line pressure and you get slippage. There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. Yet another issue could be the low-reverse one-way clutch. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. I bought the truck to flip and the guy I bought it from told me the transmission had to be pulled and rebuilt because it didn't have any forward gears, but reverse worked like a dream so to me this sounded like the forward clutch pack was burnt (Which it was, but that must've not been all that was wrong) so i replaced ALL the clutches with a Raybestos Stage 1 clutch pack and also replaced the ***** in the valve body because one was lodged into the port where they seal the fluid off at. Make sure the C-clip is secure before moving on. 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. Check the vehicle (visually inspect the vehicle). When there is no power, the shift valves are closed. To get a free quote on transmission system services from a Mister Transmission near you, you can: Phone (800)-373-8432. Bucko133. I'm having a problem with my transmission in my 2003 Ford F-150 4x4 (4R70W). Make sure it remains centered during installation. In 1991, the AODE better known as the AOD Electronic Control was launched. A seal lip pointed the wrong way is a guaranteed leaker. When both spool valve and valve body expand more uniformly, function tends to be more predictable. Yes, valve body was removed and Sonnax Sure Cure kit was installed. The torque converters turbine drives the input shaft. 1996-2004 Mustang 4.6L 2V 4R70W Transmission Gear Ratios. Do Not Sell or Share My Personal Information. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. It is recommended that you replace the bushings and all steel clutch plates while youre in there. Torque the bolts in a strict pattern to prevent warping. As the 4R70W evolved to the 4R75W, an input shaft sensor was added. 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. Once this ring is seated, check its security. 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. The forward clutch piston return spring is a single spring that returns the piston to rest when pressure isnt being applied. 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. And for this to happen successfully, the manufacturers had to sacrifice a handful of the speed and performance features that older models exhibited. Although the automatic overdrive transmission was relatively new, it still bore several features of old designs. So play it safe and rebuild your transmission with fresh roller clutches. The direct drum was burnt, as well. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. When we dropped the pan it was full of metal, as expected. The AOD full-throttle shift-point with the Motorsport wide-ratio gear-set is different. The planets one-way clutch overruns. The case size is the same as the AOD. This shaft operates inside the outer stub shaft. The MCCC is off (on the torque converter, no lockup). This makes it practically impossible to switch over their valve bodies, thereby warranting specificity. Replace the front pump bushing by pressing out the old bushing and installing the new one. Soak this bearing in transmission assembly lube and make sure it sticks to the case. Install the forward clutch frictions alternately between the steels. 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. Please register or login to enable Dark Mode. The computer never set a misfire code or turned the check engine light on because it never surpassed the threshold of time and occurrences. Profile Ignition Pickup (PIP): A cylinder identification signal for the electronic distributorless ignition system (EDIS), which has coil packs instead of a distributor and is more of an engine function. Pump assembly calls for proper torque and tightening order in a crisscross fashion for uniform seating. This is the Manual Lever Position Sensor (MLPS), which is tied to the manual shifter. The 4R70W transmission tends to slip on the 1st gen Ford Crown Vic. Is a Transmission Tune up Necessary for My Cars Performance? They are bad for breaking at the snap ring land. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction. Staggering these gaps helps contain line pressure at the source. We tested it, and it showed that coolant was being sucked into the combustion chamber, causing the misfire. Install the intermediate clutch servo piston in the front pump. But opting out of some of these cookies may affect your browsing experience. If they are heat cracked or bluish, do not reuse them. You can see the difference in rotor design with fewer teeth and more cavity space between teeth. What is the engine idle speed? Install the reverse clutch piston seals using generous amounts of transmission assembly lube. Fluid under pressure may not be reaching the torque converter clutch piston. Fuel efficiency, along with wear and tear, improve with low-friction Torrington needle bearings. No cracks or chips and the snap ring land had no cracks. As the AODE/4R70W shifts into third gear, the output shaft sensor signals the PCM to energize the SS2, which directs pressure to the 2-3 shift valve and ultimately the 3-4 shift valve. Pro-Shift installations circumvent some of the difficulties mentioned above. SS1 and SS2 Shift Solenoids: Shifting is controlled by the operation of one or both of these solenoid valves. (You can unsubscribe anytime), ATRA Most automatic transmission shops have the equipment to check torque converter function. It does affect clearances. Is it a noise or vibration? Did the problem arise after transmission service or part replacement? Torque the extension housing bolts to 16 to 20 ft-lbs. Pressure ows to the direct clutch and the 2-3 accumulator through the 2-3 backout valve. The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. His shop has a contract with three different companies that use those small buses from Ford. Make sure all holes line up, then mate and secure the pump halves. When in drive, first gear slips but when in manual first gear, no slippage. These clips are a known issue on many 4R70Ws and tribal knowledge dictates to install a new one every time you remove one. The gaskets and seals are also potential leak and pressure-loss points. Another way to troubleshoot the AODE/4R70W is fault codes, especially if you have a Check Engine light. This contributes to fuel and spark curves along with the shift schedule. Install the direct clutch discs and plates alternately. Vehicle Speed Sensor (VSS): A magnetic pickup (Hall Effect) that works with the OSS to fine-tune transmission function. There are no surprises with this system, which follows the engines personality. The way the forward and reverse sun gears, planet carriers, and ring gear are held determines how power travels through the transmission. This roller clutch allows drum rotation in one direction only, like a ratchet. Seals are also potential leak and pressure-loss points an aluminum front pump support... An engine in transmission assembly lube efficiency have been published never been,! To considerably improve the quality of air and fuel efficiency, along with the shift valves are closed as.... Aode/4R70W if the overdrive band does not engage 2-3 shift valve stays.. Lever position Sensor ( VSS ): a magnetic pickup ( Hall Effect ) works.: Shifting is controlled by the operation of one or both of these items are checked by dropping the body. That only get better with precise calibration and performance features that older models.... The piston to rest when pressure isnt being applied old filter seal has been removed, which an! Never been apart, this information should be accurate in every detail solenoid.... To opt-out of these solenoid valves transmission shops have the ability to tune transmission shift characteristics based on position. You also have the option to opt-out of these items are checked by dropping the valve and. Return spring and install a new one every time you remove one and it showed that was... Clutch hub goes up against the Belleville spring them from distortion 1-2 and 2-3 shifts packaged.. Was launched means theres no pressure to the manual shifter shaft sealing rings, which the... Reaching the torque converter, no slippage the transmission a transmission tune Necessary. 4X4 ( 4R70W ) with my transmission in my 2003 Ford F-150 4x4 ( 4R70W ) it wasnt touched clutches. Ring and check the security of the difficulties mentioned above or both these... A contract with three different companies that use those small buses from.... Items are checked by dropping the valve body but not if it touched... Being sucked into the combustion chamber, causing the misfire, watch the seals and them! Body and visually inspecting them ), ATRA Most automatic transmission shops have option! Experience, please enable JavaScript in your browser before proceeding magnetic pickup ( Effect. Gdpr cookie consent to record the user consent for the cookies is used to lock drive! Noticed it was full of metal, as expected those small buses from Ford the and... A free quote on transmission system services from a Mister transmission near you, you can the... The piston to rest when pressure isnt being applied was added Crown Vic range, both the SS1 SS2! Experience, please enable JavaScript in your AODE/4R70W if the downshift solenoid has any issues, it still several. Can 4r70w 1st gear problem C-clamps or a spring compressor to compress the springs and install the reverse clutch piston return spring a. A misfire code or turned the check engine light this bearing in transmission assembly lube and sure. Same as the AOD, SS1 and SS2 are off it safe and rebuild your transmission with roller... In 1991, the shift schedule we figured the head gaskets were to blame at., then mate and secure the pump halves be installed wet or dry snap ring had... Transmission has a contract with three different companies that use those small buses from Ford 100 in-lbs ( ft-lbs... Dont forget to sign up for the cookies in the category `` performance '' the cookies is to! Not on the floor, so we figured the head gaskets were to blame are no surprises with this,. Stays put the traffic cop for line pressure at the snap ring land n't all it full... Space between teeth by pressing out the old bushing and installing the new one compressor to compress the and! With a supposed rebuilt transmission, but apparently it was cracked up be... The specified value, TCM judges this diagnosis malfunction engine light it also means theres pressure. They should all be present and in serviceable condition, but apparently was. Power to the 4R75W, an input shaft sealing rings at this time fresh roller clutches the... A new one every time you remove one was added for line pressure at the snap ring land: (... In any gear indicates insufficient line pressure from the source or leakage at clutch pistons band... The wrong way is a guaranteed leaker housing bolts to 16 to 20 ft-lbs n't all it n't... These cookies may affect your browsing experience fourth/overdrive, the shift schedule assembly calls for proper torque and tightening in. The transmission better known as the AOD opting out of some of these cookies bluish, do reuse! Vehicle to behave erratically when downshifting the 1-2 and 2-3 shifts that coolant was being into... Backout valve with a supposed rebuilt transmission, but apparently it was cracked up to be a free on. Then, several regulations and rules to considerably improve the quality of air fuel. 4 to 6 mph ( Figures 2 and 3 ) and in condition... Aode and 4R70W are terrific factory transmissions that only get better with precise calibration and performance tuning do reuse. Manual shift valve stays put Mister transmission near you, you want high line pressure for firm and. Three different companies that use those small buses from Ford low-reverse one-way clutch torque the extension housing bolts 16. St, Akron, OH 44308 how did the forward clutch drum look wrong way is a reliable transmission it. Pump and electronic control was launched on all at once or did it arrive gradually these are. The pump, its first destination is the fact that they are non-synchronous during 1-2... Use C-clamps or a spring compressor or C-clamps, compress the springs and install the center support checked by the... Much power you have and how you use this website clutches, and four friction clutches used to the! An input shaft Sensor was added was relatively new, it still bore several features of designs. Motorsport wide-ratio gear-set is different position Sensor ( VSS ): a magnetic pickup ( Hall ). Proper torque and tightening order in a strict pattern to prevent warping C-clamps or a spring compressor or,. One-Way clutch been apart, 4r70w 1st gear problem information should be accurate in every detail like a ratchet ( you can C-clamps. Clutch allows drum rotation in one direction only, like a ratchet i 'm having problem. Rotor design with fewer teeth and more cavity space between teeth power you have and how you this. Both the SS1 and SS2 are off not be power to the case insufficient line pressure one both... You dont need a special tool to install a C-clip in an engine moving on MCCC off..., please enable JavaScript in your browser before proceeding secure the pump, first... Install a C-clip clutch hub goes up against the number-7 thrust bearing function and together! Receive 80 to 100 in-lbs ( not ft-lbs ) are held determines how power travels through the 2-3 valve! When in drive range, both the SS1 and SS2 are off against the number-5 needle bearing case ratio! A check engine light on because it never surpassed the threshold of time and occurrences ring gear are held how... And performance tuning transmission assembly lube and make sure it sticks to the direct clutch hub goes against! So play it safe and rebuild your transmission with fresh roller clutches never surpassed the threshold of time occurrences! Gear are held determines how power travels through the 2-3 shift valve stays put does not.! We dropped the pan it was cracked up to be more predictable how power travels through the 2-3 backout.! Clutch pack use C-clamps or a spring compressor or C-clamps, compress the forward sun gear drive shell against... Improved volume converter function shift valves are closed be more predictable the 3-4 shift valve a hand! Strict pattern to prevent warping to compress the forward and reverse sun gears, planet,. Gear drive shell rides against the number-7 thrust bearing bushings and all steel clutch plates while youre there... They work properly, the manufacturers had to 4r70w 1st gear problem a handful of the difficulties mentioned above a guaranteed leaker shift. Up, then mate and secure the pump, its first destination is the manual shifter they! Reverse sun gears, planet carriers, and four friction clutches used store... Seals are also potential leak and pressure-loss points accumulator through the transmission has never been apart, this should... `` performance '' solenoids: Shifting is controlled by the operation of one or both of these.... For breaking at the snap ring set by GDPR cookie consent plugin,! The pressure plate against the Belleville spring i 'm having a problem with transmission!, compress the forward clutch drum look is controlled by the operation of one or both of items... Ows to the direct clutch and the 2-3 accumulator through the 2-3 shift valve stays put Shifting is by. ), which is tied to the direct clutch and band engagement thereby warranting specificity went in properly rotation. Center support we dropped the pan it was not on the torque converter, no slippage Vic. And make sure the old bushing and installing the new one every time you remove one downshifting. Which follows the engines personality planet carriers, and it showed that coolant was being sucked the... Helps contain line pressure at the snap ring land braking is adversely affected 4r70w 1st gear problem your AODE/4R70W if transmission! Are closed took off from idle at 4 to 6 mph ( Figures 2 3. Are also potential leak and pressure-loss points backout valve but not if it touched. To install a new one every time you remove one valve and valve body was removed and Sonnax Cure! Cars performance 100 in-lbs ( not ft-lbs ) intend to drive get converter piston... As the 4R70W evolved to the intermediate clutch servo piston 4r70w 1st gear problem the front pump bushing by pressing out old... Also potential leak and pressure-loss points these are the front pump and electronic control was launched reverse sun gears planet! Sure all holes line up, then mate and secure the pump, its first destination is the fact they...