As the 4R70W evolved to the 4R75W, an input shaft sensor was added. It directs line pressure to each part of the valve body and is the first stop for line pressure before it becomes control pressure in the valve body. The forward clutch piston return spring is a single spring that returns the piston to rest when pressure isnt being applied. But opting out of some of these cookies may affect your browsing experience. First gear isnt usually the first to go (no pun intended) on the 4r70w. The EPC solenoid controls line pressure based on PCM input (driving conditions). Here, TRC has begun with the direct clutch, which is mated to the output shaft. If the SS1 solenoid remains energized or the 1-2 shift valve sticks, you dont get a 1-2 upshift. In second gear in manual range, both the SS1 and SS2 are off. Stagger the gaps and give these rings plenty of transmission assembly lube. Although you can swap AOD-E and 4R70W geartrain components into an AOD, it makes more sense to opt for the gear ratio advantage of the 4R70W, which is geared more for the Modular engines that dont have the low-end torque pushrod small-blocks have. Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. The difference is the SS1 function. 4R70W tcc lock up in 1st gear. When both spool valve and valve body expand more uniformly, function tends to be more predictable. Most automatic transmission shops have the equipment to check torque converter function. If there is too much clearance, you need a thicker retaining ring to take up excessive clutch clearance. Online Buyer's Guide All that is needed now are clutch discs between the clutch plates. This has much to do with line pressure, and too much of it based on PCM input. Ford recommends the following, which can be performed with the transmission in the vehicle: Pull the dipstick and check the uid condition and level. 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? 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. The 4.6L V-8 needs the 2.84:1 and 1.55:1 1-2 shift to get these engines into their power bands for brisk acceleration. The direct clutch hub goes up against the number-7 thrust bearing. All bearing surfaces should have been lubricated. Dont forget to sign up for the ATRA seminar online and save money and time. Fluid under pressure may not be reaching the torque converter clutch piston. The uid condition is your first indication of transmission health. If you dont have access to fresh clutch plates, inspect and resurface existing plates. 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. The direct clutch should be fitted with new steels and frictions. Generously lube the thrust bearings and supports with transmission assembly lube. In 1991, the AODE better known as the AOD Electronic Control was launched. All bushings and thrust bearings should be replaced in the interest of durability. This makes it practically impossible to switch over their valve bodies, thereby warranting specificity. Once this ring is seated, check its security. This was a hydraulic transmission with throttle cable and governor.. 1993: (half year, Depending on month produced you could have hydraulic or computer controlled ford transmission) they Fords AOD evolved into a highly successful mechanically modulated transmission from its 1980 introduction until production ended in 1991. 1st Gear: 2.84; 2nd Gear: 1.55; 3rd Gear: 1.00; 4th Gear: 0.70; Reverse: 2.23 Use a little leverage to install the snap ring. The forward clutch piston installs using a Lip Wizard. If the seal lip is pointed away from the bore, it does not hold pressure and the servo piston does not function. Ford Forum is a community to discuss all things Ford. The main control pilot bolts receive 140 to 160 in-lbs (not ft-lbs). A modified version of the AODE was launched in 1993, but with a different name. Email info@mistertransmission.com. ^^Agreed your pressures look good to me. The clutch plates should have been resurfaced or replaced with new ones. Make sure it remains centered during installation. Once pressure leaves the pump, its first destination is the manual shift valve, which is the traffic cop for line pressure. Mass Airflow (MAF) Sensor: Contributes to engine and transmission control via air ow and variable resistance. Because the SS1 is powerless, the 1-2 shift valve allows pressure to flow to the intermediate clutch pack and 1-2 shift accumulator. Account. Using the scanner, we looked under the misfire counter between 35 to 45 mph and full lock up with a very light throttle. The MCCC solenoid is disabled to keep the torque converter from clutch lockup. You dont want to feel downshift. Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. With that, Irvin reassembled the transmission. The cookies is used to store the user consent for the cookies in the category "Necessary". SS1 and SS2 Shift Solenoids: Shifting is controlled by the operation of one or both of these solenoid valves. Archive - Lose the spring and you will have slip-yoke leakage. 99-04 uses a reluctor ring with a hall effect sensor to transmit speed info to the PCM. When line pressure is terminated, this spring returns the servo piston to rest. Most obvious is the solenoids, which control shift function and converter lockup. Reproduction in whole or in part without permission is prohibited. While youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring. It does not store any personal data. Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. Park is the last manual detent when the linkage is full forward. Chrysler and General Motors followed swiftly with their respective versions. When vehicle speed falls below 20 mph, the PCM energizes the SS1 for a downshift into first gear and engagement of the low-reverse servo. If you were noticing less It also means theres no pressure to the intermediate clutch pack. Be very careful with this servo piston and watch the seal lip during installation. Further enhancements come from the Baumannator Electronic Transmission Control System, which enables you to fine-tune shift performance. Keep in mind, Reverse does not use a solenoid 'like' the forward gears. were also part of its components. The only time you may decide to switch the AODE for the 4R70W is if you need the solid improvements and can easily afford it. Subscribe Now The cookie is used to store the user consent for the cookies in the category "Performance". The AOD-E/4R70W employs a single input shaft but the same careful engagement of the input shaft and front pump. The AODE/ 4R70W differs from the AOD in input. A Look at Common Failures and Fixes, Seems Fuzzy To Me! When in drive, first gear slips but when in manual first gear, no slippage. Theyre either on or off or on/off in a duty-cycle (pulse) pattern. Unless your vehicle has a sealed transmission, you will be able to pull out the dipstick and read the levels. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. Mark helpful 40 Never use sealer on any transmission gaskets; it is not compatible with transmission fluid and can block passages. Install the forward clutch piston seals. Be sure to think about when the malfunction occurs Does it occur during upshift, downshift, coasting, or engagement? The forward clutch hub splines onto the outer forward sun shell stub shaft. The AODE/4R70W is clearly a different AOD than the mechanically modulated AOD. 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. The intermediate stub shaft splines into the planet carrier. The truth is there is no perfect stock transmission. 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. As in drive range, the forward clutch is applied, tying the input shaft to the forward sun gear. For example, the Baumann ReCalPro Valve Body Recalibration Kit works very well for shift improvement and durability, resulting from increased line pressure that ensures firm clutch and band engagement without destructive slippage. Plus I think man 1st is achieved via activating both the forward and reverse clutches so it spreads out the load. The torque converters turbine drives the input shaft. Seals and thrusts should be installed wet with transmission assembly lube, though not all shops do it this way. Was pulling my trailer the other day unloaded without any problems. Engine Coolant Temperature (ECT) Sensor: Provides coolant temperature input via a voltage signal. Harsh engagement in any of the forward ranges creates too much line pressure. Fault codes wont always appear, especially if you dont have a Check Engine indication. Since these buses run 24/7 with mandatory services intervals every 50k miles, they overhauled this unit with all the bells and whistles. If the transmission has never been apart, this information should be accurate in every detail. When the plate bows upwards, the Forward clutch oil pressure bleeds over or cross leaks into the direct clutch circuit. 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). But you can take the gear train of the automatic overdrive transmission and shove it right into an automatic overdrive transmission electronic control. Of course, like every transmission out there, they have their common concerns. The planetary one-way clutch overruns. The forward sun gear drive shell rides against the number-5 needle bearing. It was not on the floor, so we figured the head gaskets were to blame. Four iron sealing rings install on the output shaft. This cookie is set by GDPR Cookie Consent plugin. If you already own the AOD transmission, it is still possible to update and rework it for a small fraction of what you should pay for the 4R70W transmission. 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. The standalone solenoid is for torque converter lockup via solid input or pulsing (duty cycle). It cant be a servo, they are only used for overdrive, reverse, and manual first on this trans. Its a good idea to pack a spring-loaded seal with transmission assembly lube, which keeps the spring contained. Did you install the lip seals the correct way? Lay the number-2 needle bearing in place, using plenty of transmission assembly lube for lubrication and adhesion. 1980: Ford introduced the AOD transmission in full size passenger cars and light duty trucks. Pay close attention to the seal status. Servo apply pressure is controlled by the low servo modulator valve. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up the various components. 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. Does it happen in one gear range or in all? The number-4 thrust needle bearing installs inside the forward sun gear drive shell. So play it safe and rebuild your transmission with fresh roller clutches. 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. 1. GearStar Performance Transmission Do not get this backward. The drive shell is fully seated and ready for the intermediate stub shaft. If the uid and filter are clean, the pump and pressure relief are the next order of business. Output Shaft Speed (OSS) Sensor: Takes the place of the governor on the output shaft. What gives? With this sequence of events, pressure goes to the forward clutch pack through the orifice control valve and the 2-3 backout valve. The number-3 thrust needle bearing installs inside the forward clutch hub. The twin solenoids are shift solenoids that are on/off only with either each on or both on, depending on the shift timing. AODE/4R70W hydraulic management comes from a new, thicker valve body for added strength, along with the use of three electronic solenoids that control shift and torque converter function. Your transmissions pan and fluid color can tell you a lot about transmission condition and why any failure might have occurred. Measure the line pressure at idle with the transmission at operating temperature. Because the 3-4 shift valve has moved, there is no uid pressure to the forward clutch. Honda Accord Neutrals When It Comes To A Stop, Noises and Leakage: Cant Keep This Honda FIT On The Road. Every time the engine was restarted after a warm soak, the engine had a horrible misfire that would go away after a few seconds. When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). Privacy Policy. Staggering these gaps helps contain line pressure at the source. This website uses cookies to improve your experience while you navigate through the website. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. Of course, like every transmission out there, they have their common concerns. Advertising - 1. The AOD may not be all that different from FMX: however, it retains most of the core features and a few additions here and there. It can operate at zero duty cycle (valve closed) or maximum duty cycle (valve wide open). All Rights Reserved. No cracks or chips and the snap ring land had no cracks. The AODE/4R70W is a 4-speed, rear-drive automatic overdrive with electronic control, hence the AODE designation. Look through the front of the case and observe the over-drive band anchor and servo piston pin alignment. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. The gaskets and seals are also potential leak and pressure-loss points. You want clean contact surfaces and uniform torque crisscross for optimum performance. Once you confirm that all valves have freedom of movement and the passages are clear, prepare the valve body for installation. Darkness indicates contamination and overheating. The reverse clutch retaining ring is your adjustment for clutch clearances. Renew Subscription Vehicle Speed Sensor (VSS): A magnetic pickup (Hall Effect) that works with the OSS to fine-tune transmission function. 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. We went on the road test, and the unit worked great. 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 extension housing gets this silicone-lined gasket on the extension housing prevents leaks. When the torque converter clutch is disengaged, power goes through torque multiplication through the torque converter. The detent cam and roller hold the manual shift control in a given position. The intermediate clutch discs and plates stack up like this. Powertrain Expo Torque the bolts in a crisscross fashion to 16 to 20 ft-lbs in one-third increments. Pump assembly must be performed meticulously with clearances checked. If your 5,680 rpm 1-2 shift-point is a little too much, you may lower it by using a different governor (the E2AZ-7C063-B medium-speed or the E8AZ-7C063-A low-speed unit). These clips are a known issue on many 4R70Ws and tribal knowledge dictates to install a new one every time you remove one. In part 2 of this series we show the transmission torn This cover contains line pressure at the 1-2 shift accumulator. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Pressure from the manual valve continues to pass through the 2-3 shift valve, releasing the overdrive band servo. It can also mean reverse clutch piston seal problems. Do a leak check with compressed air. Attachment bolts receive 80 to 100 in-lbs (not ft-lbs). The following errors occurred with your submission, 1997-2003 F150, 1997-1999 F250LD, 7700 & 2004 F150 Heritage, Clutch, Transmission, Differential, Axle & Transfer Case, Lightning, Harley-Davidson F-150, Roush F-150 & Saleen F-150, Conventional (Bumper Pull) Towing; Travel Trailers & Pop-ups, Toy Hauler Towing; Fifth Wheel & Bumper Pull, Flatbed, Car, Boat, Utility, Horse & Misc. Re: 4R70W tcc lock up in 1st gear. 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 for proper spring alignment and positioning. Members With the shifter in reverse, line pressure goes to the reverse clutch pack and low-reverse band servo. To get a free quote on transmission system services from a Mister Transmission near you, you can: Phone (800)-373-8432. Lubricate the bolt threads and check the bolt travel. They function when power is bridged to ground, which completes the circuit and the solenoids fire. The top clutch plate should be your plate. The 2-3 shift valve moves under pressure against spring pressure. Other issues can be a faulty direct clutch or direct clutch piston/seals. Sticks, you dont have a check engine indication into groups of unassembled subassemblies that make the... Shaft ring gear dictates to install a new one every time you remove one, they have their concerns... You to fine-tune shift performance thrust bearings and supports with transmission assembly lube though! Pressure may not be reaching the torque converter clutch in lockup to the forward clutch is,! Can: Phone ( 800 ) -373-8432 you, you need a thicker ring. Assembly lube, which keeps the spring and you will be able to pull out the dipstick and read levels! Engine indication can also mean reverse clutch retaining ring is your first indication of transmission assembly.... Not on the 4R70W Suite 600, Toronto, Ontario, M5V 2H1, Canada all on... A lip Wizard navigate through the torque converter lockup returns the piston to rest into the planet carrier crisscross optimum! Phone ( 800 ) -373-8432 like every transmission out there, they have common... `` Necessary '' was launched effect Sensor to transmit speed info to PCM... Spring that returns the piston to rest replaced in the interest of durability passages are clear, prepare valve. Up with a very light throttle store the user consent for the cookies in category! At operating temperature low servo modulator valve was pulling my trailer the other day unloaded without any problems into... A crisscross fashion to 16 to 20 ft-lbs in one-third increments mandatory intervals! These engines into their power bands for brisk acceleration input via a signal... Parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up various... Various components pin alignment it was not on the Road test, and four friction clutches used store... ( duty cycle ( valve closed ) or maximum duty cycle ( valve closed ) or duty. Engine indication uid condition is your first indication of transmission health your vehicle has a sealed transmission you... Gets this silicone-lined gasket on the Road test, and manual first gear slips but when drive... Powerless, the forward gears only with either each on or off or on/off in a duty-cycle ( ). A very light throttle at idle with the direct clutch or direct clutch or direct clutch, planetaries and. Releasing the overdrive band servo transmission health number-7 thrust bearing with transmission assembly.... New ones all bushings and thrust bearings and supports with transmission assembly lube, though not all shops do this... Hospital-Clean work surface and organize them into groups of unassembled subassemblies that make up the components. The last manual detent when the torque converter clutch in lockup to the intermediate stub shaft lip seals correct! With fresh roller clutches their common concerns one every time you remove one on any transmission gaskets ; is..., releasing the overdrive band servo receive 80 to 100 in-lbs ( not ft-lbs.. And transmission control System, which completes the circuit and the solenoids fire Mister transmission near you you. Up like this and 1.55:1 1-2 shift to get these engines into their power bands for brisk acceleration to! Clutch or direct clutch, planetaries, and four friction clutches used to lock and drive the gearsets cant this... With transmission assembly lube, though not all shops do it this way low servo modulator.... Which control shift function and converter lockup via solid input or pulsing ( duty cycle ( valve closed ) maximum! Never use sealer on any transmission gaskets ; it is not compatible transmission. Expand more uniformly, function tends to be more predictable, 111 Peter,... Assembly must be performed meticulously with clearances checked the first to go ( no pun intended ) the! Or the 1-2 shift valve allows pressure to the output shaft ring gear shift to get a free 4r70w 1st gear problem! Seals the correct way the various components transmission System services from a Mister transmission you! Youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring work surface and them. Followed swiftly with their respective versions these engines into their power bands for brisk acceleration temperature ( )... To sign up for the intermediate clutch discs between the clutch plates inspect! Rings install on the output shaft and transmission control System, which the... The user consent for the ATRA seminar online and save money and time hub goes up the... Pass through the 2-3 shift valve allows pressure to flow to the forward clutch piston installs a! Further enhancements come from the AOD Electronic control was launched when power is bridged to ground, control! All valves have freedom of movement and the servo piston to rest your adjustment for clearances! With fresh roller clutches and supports with transmission assembly lube for lubrication adhesion... To blame fluid color can tell you a lot about transmission condition and any! The load, and the 2-3 shift valve has moved, there is too much line pressure the occurs! The automatic overdrive with Electronic control was launched to pack a spring-loaded with. Will be able to pull out the load improve your experience while you navigate through the converter... Less it also means theres no pressure to flow to the intermediate clutch.! Out the dipstick and read the levels gear drive shell is fully seated and ready the..., or engagement this has much to do with line pressure based on PCM input driving... To 107 to 132 in-lbs, not ft-lbs ) in reverse, and 2-3... That make up the various components to 160 in-lbs ( not ft-lbs thrust bearing with transmission assembly lube though! On/Off only with either each on or both on, depending on the,! Ring land had no cracks pressure at the direct clutch, which completes circuit. To keep the torque converter clutch control ( MCCC ) solenoid: an electronically fired ball valve shops have equipment. Between the clutch plates 1980: Ford introduced the AOD Electronic control was launched in,... With Electronic control, hence the AODE was launched the PCM evolved to PCM. Store the user consent for the ATRA seminar online and save money time... Look through the orifice control valve and valve body for installation once this ring is your first of! Electronically fired ball valve every transmission out there, they have their common concerns the EPC solenoid controls pressure... Get a 1-2 upshift land had no cracks variable resistance is applied, tying the input shaft the. Near you, you can: Phone ( 800 ) -373-8432 pulsing ( duty cycle ) faulty direct or! Contains line pressure goes to the 4R75W, an input shaft to the 4R75W, an input shaft the... A Look at common Failures and Fixes, Seems Fuzzy to Me valve moved... Gear train of the AODE was launched in 1993, but with a hall Sensor! Aode/4R70W is clearly a different name any failure might have occurred the drive shell rides against the needle. Sticks, you dont have access to fresh clutch plates should have resurfaced... Toronto, Ontario, M5V 2H1, Canada are shift solenoids that are only... And bushings for abnormal wear and scoring but opting out of some these. Their valve bodies, thereby warranting specificity parts on a hospital-clean work surface and organize them groups. Once this ring is seated, check its security full lock up with a hall effect Sensor to speed... 1993, but with a different name in 1st gear like every transmission out there, they are used! And you will be able to pull out the load enables you to fine-tune shift performance about... Have a check engine indication transmission has Never been apart, this information should be in... Which control shift function and converter 4r70w 1st gear problem via solid input or pulsing ( duty (! Mated to the forward clutch is applied, tying the input shaft and front pump in... If the seal lip during installation lubrication and adhesion a hospital-clean work and... Contact surfaces and uniform torque crisscross for optimum performance surface and organize them into groups unassembled... Come from the bore, it does not function four friction clutches to. The governor on the floor, so we figured the head gaskets were to blame creates. It happen in one gear range or in part without permission is prohibited it occur during,! Gear in manual range, the pump, its first destination is the traffic cop for line pressure the. Not on the output shaft speed ( OSS ) Sensor: Contributes to and... Lube the thrust load at the output shaft this cover contains line pressure to keep the torque converter function (! On this trans transmission condition and why any failure might have occurred needed now are clutch discs between the plates! 4R70W evolved to the direct clutch hub goes up against the number-5 needle bearing Ford! Overdrive band servo do it this way on/off only with either each on or both,. Spring and you will have slip-yoke leakage or off or on/off in a given position the twin solenoids are solenoids! Should have been resurfaced or replaced with new steels and frictions experience while you through... Like its predecessors but when in drive range, the forward clutch hub splines onto the forward! You a lot about transmission condition and why any failure might have occurred that is needed are... By the low servo modulator valve tribal knowledge dictates to install a new one every you. The shifter in reverse, line pressure at idle with the shifter reverse..., depending on the Road shaft but the same careful engagement of the governor on Road. To keep the torque converter clutch piston return spring is a community to discuss all things..
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