Weak or soft engagement in any gear indicates insufficient line pressure from the source or leakage at clutch pistons or band servos. Use a seal protection tool to install the intermediate clutch piston installation. There are two bands, two one-way clutches, and four friction clutches used to lock and drive the gearsets. Ford Forum is a community to discuss all things Ford. It can also mean reverse clutch piston seal problems. Check for proper spring alignment and positioning. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make up the various components. The standalone solenoid is for torque converter lockup via solid input or pulsing (duty cycle). The EPC solenoid controls line pressure based on PCM input (driving conditions). The planetary support assembly fits into the main case. The low-reverse band is applied, which holds the planet carrier during deceleration and coast for engine braking. Pay close attention to the seal status. That's my plan of attack, thanks for the help. If the seal lip is pointed away from the bore, it does not hold pressure and the servo piston does not function. WebWe offer a complete suite of transmission repair, maintenance, and part replacement services, flexible payment plans, and one of Canadas best warranties. If this cannot be achieved, go with the appropriate retaining ring: .060 to .064, .074 to .078, .088 to .092, or .102 to .106 inch. The RDI was ordered and taken to the bench for disassembly. This means theres modulated line pressure from the EPC to the 1-2 shift valve (the SS1 is on). Transmission problems are often perceived as mechanical or hydraulic when they are actually electrical issues that adversely affect the hydromechanical parts. Seals and thrusts should be installed wet with transmission assembly lube, though not all shops do it this way. Once this ring is seated, check its security. Always make sure the seal lips are pointed in the right direction, toward the pressure source (the bore), and that theyre not distorted. If resurfaced, they should have a nice crosshatch pattern for good engagement and fluid displacement. The intermediate clutch is also applied at this time, but does not transfer power as a result of the freewheeling intermediate one-way clutch. It wasnt all that different from the FMX 3-speed automatics since common FMX components such as the Ravigneaux gear train, etc. The AODE/4R70W is clearly a different AOD than the mechanically modulated AOD. Erratic shifting One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. Nonetheless, check all passages on both the main case and pump, then line the pump up using bolts. 1996-2004 Mustang 4.6L 2V 4R70W Transmission Gear Ratios. While youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring. Do not take shortcuts. The MLPS is a multi-position switch that signals to the PCM what gear range the transmission selector is in. Yet another issue could be the low-reverse one-way clutch. Is the noise or vibration in rhythm with the engine, driveline, or wheels? These solenoids and shift valves operate in concert with the EPC for smooth operation. This transmission has lower gear ratios in first and second gears, which brings about improved Any seal bind is a guaranteed leak. Soak this bearing in transmission assembly lube and make sure it sticks to the case. Rock these assemblies back and forth until the forward clutch is completely seated in the reverse clutch drum. When we dropped the pan it was full of metal, as expected. Check this ring carefully for proper seating. And that is why you should know what it can and what it cant do. I would start by removing the valve body and inspecing it first. Did you remove the valve body when you fixed your other problem? The main control pilot bolts receive 140 to 160 in-lbs (not ft-lbs). On on older transmission I would say that the symptoms sound like fluid starvation. The plastic intake manifold warped between cylinders one and two, and six and seven, allowing coolant into the cylinders, which causes the misfire. It allows the seals to transition smoothly without binding. The direct clutch is applied, tying the input shaft to the planet carrier to the smaller inside input shaft (stub shaft). Make sure the C-clip is secure before moving on. Installing them wet gives them a good start against freshly resurfaced clutch drums. Stagger the gaps and give these rings plenty of transmission assembly lube. For a better experience, please enable JavaScript in your browser before proceeding. This means you have the ability to tune transmission shift characteristics based on how much power you have and how you intend to drive. The MCCC engages and disengages the torque converter clutch. Advertising - The direct clutch hub goes up against the number-7 thrust bearing. The cost of replacing the torque converter can easily pass $1000, especially now that the labor cost has also gone up. Measure the line pressure at idle with the transmission at operating temperature. The only inter-changeable components are geartrain related. This installs exactly as you see here with a cover and C-clip. If you were noticing less Replace the front pump bushing by pressing out the old bushing and installing the new one. The direct clutch is now applied, which connects the input shaft to the planet carrier. Focus on any electronic add-on components. Do a leak check with compressed air. Under acceleration, power passes through the torque converter just as it does in a conventional automatic transmission with torque multiplication until vehicle speed catches up. 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. This shaft operates inside the outer stub shaft. There it was a misfire. The number-5 needle bearing is already installed here. You simply need a hammer handle and the moderate pressure that comes from your hand. It is recommended that you lube the thrust bearing with transmission assembly lube for a good wet start-up. Could have rolled a lip seal. This is the forward clutch with input shaft. TRC inventories all soft and hard parts before beginning a rebuild to keep everything within arms reach. Did you install the lip seals the correct way? The AODE/4R70W is a 4-speed, rear-drive automatic overdrive with electronic control, hence the AODE designation. Next, we suspected the intake manifold. The 1-2 shift valve remains as is. Overloading the 4R70W transmission is a bad idea. And since then, several regulations and rules to considerably improve the quality of air and fuel efficiency have been published. TRC installs frictions dry. When in drive, first gear slips but when in manual first gear, no slippage. Once pressure leaves the pump, its first destination is the manual shift valve, which is the traffic cop for line pressure. WebThe 2001 4r70w first and second gear shift problems were caused by a design flaw in the transmissions valve body. Give these rings and grooves abundant lubrication. Ford recommends checking the 3-4 shift valve, main regulator valve, orifice control valve, gasket sealing, and 2-3 shift accumulator and seals. Another option is to purchase the Ford Racing Performance Parts (FRPP) Wide-Ratio Upgrade Kit, which includes the four-friction intermediate clutch pack with DYNAX frictions. Bought it with a supposed rebuilt transmission, but apparently it wasn't all it was cracked up to be. It can pop out if it is not completely seated. Spring pressure here determines shift firmness. Does it happen in one gear range or in all? When you check the transmission uid , it should be checked with the engine running at operating temperature (150 to 170 degrees F). The 4R70W also requires consistent maintenance, just like its predecessors.This way, you will have an incredibly powerful transmission. Pressure all by itself doesnt move the 3-4 upshift valve. Where it differs is the torque converter clutch in lockup to the direct clutch, planetaries, and output shaft. All bearing surfaces should have been lubricated. I shifted down into 1st and it won't move, feels like it's in neutral. Change Your Address, Yes, I would like to receive emails from Gears Magazine. Email info@mistertransmission.com. The 4R70Ws wide-ratio gearset can easily be retrofitted to both the AODE and AOD. In third gear in overdrive range, the SS1 is off and the SS2 is on. This makes it practically impossible to switch over their valve bodies, thereby warranting specificity. Cart With the locking converter comes a wider bellhousing than the AOD has. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. Begin with the simplest, most commonsense issues. Bucko133. These Necessary cookies are absolutely essential for the website to function properly. The MCCC is controlled by the PCM. Powertrain Expo This allows for proper seating and prevents warping. This allows full pressure to the overdrive servo and band. According to ASTG all your line pressures are fine. 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. What is the engine idle speed? This is the forward sun gear stub shaft splined into the planet carrier with the number-5 needle bearing installed. As a result, Ford engineers added a spring to give the 3-4 shift valve a helping hand. 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. Nevertheless, both transmissions are interchangeable. Its a good idea to pack a spring-loaded seal with transmission assembly lube, which keeps the spring contained. You also have the option to opt-out of these cookies. Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. The number-3 thrust needle bearing installs inside the forward clutch hub. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. Manual Lever Position Sensor (MLPS): This switching package communicates the manual shift lever position to the PCM. 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. These sealing rings must be well lubricated for pump installation. The twin solenoids are shift solenoids that are on/off only with either each on or both on, depending on the shift timing. The MCCC gets pulsing signals from the PCM. WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. Never reuse old bearings or seals. Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). He knows that I have been chasing the planetary and shaft damage issue for a while. This drain hole must be at 6 oclock. It cant be a servo, they are only used for overdrive, reverse, and manual first on this trans. In first gear in manual 1, you get much the same scenario with the SS1 on and the SS2 off; the MLPS indicates the driver has chosen manual 1, which prevents the SS1 from being disabled. Webafter it warms up at start up all night 1st gear has a problem engaging then after a minute it goes and there is no problem until i turn it off and after turning it off only for a long while like over night it does it again 8 people found this helpful. 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. This cookie is set by GDPR Cookie Consent plugin. Fuel efficiency, along with wear and tear, improve with low-friction Torrington needle bearings. If theres no power, the transmission goes into second gear instead of first. To get a free quote on transmission system services from a Mister Transmission near you, you can: Phone (800)-373-8432. The valve body is responsible for controlling the flow of fluid Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features. Legal/Privacy. Staggering the gaps helps the sealing rings hold pressure. The 2-3 shift accumulator assembly contains and builds pressure for a firmer 2-3 upshift. I put them in exactly as they came out and possibly could be that. Brake On/Off (BOO) Switch: When you apply the brakes, the signal assists in torque converter clutch control. Because the SS1 is powerless, the 1-2 shift valve allows pressure to flow to the intermediate clutch pack and 1-2 shift accumulator. Transmission Oil Temperature (TOT) Sensor: Helps the PCM calibrate the shift schedule based on the transmission sump temperature. You may also use the Ford tool (PN T92P-70023-A). 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? Make sure you wipe it off and put it back in for a more accurate reading. In first gear in the drive range, the SS1 is on and the SS2 is off. 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. Before mating them, make sure all contact surfaces are clean. WebFord 4R70W/4R75W Transmission Information. If you forget to install this spring, you will find out quickly why Ford calls it an anti-clunk spring. The planet carrier splines inside the ring gear with gentle back-and-forth twisting to achieve proper engagement. Troubleshooting the AODE/ 4R70W begins with ascertaining the problem. Harsh or Improper Shifting Without a valid speed signal from these sensors, the PCM will not be able to correctly control They are controlled via two different hydraulic circuits. ^^Agreed your pressures look good to me. Please register or login to enable Dark Mode. 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. In other words, are the two pump halves securely tightened? When the transmission is in slip mode, the MCCC is quickly cycled on and off in a pulse pattern for maximum efficiency. Electronic Pressure Control (EPC) Solenoid: Your AODE/4R70Ws pace-maker. 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 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. The vehicle in question was a 2014 Ford Econoline E-250 bus. Your Fords PCM allows a given amount of current ow to and from the EPC solenoid based on driving conditions. Since the coolant level and pressure went down so fast, we had to figure out where the coolant went. Take note of how the rollers fit into the cage. Generously lube this assembly and install it, along with the cover. Install the forward clutch piston seals. Although the automatic overdrive transmission was relatively new, it still bore several features of old designs. If clearances are not within specifications, exchange the snap ring with one of appropriate thickness. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. The harness protects the wiring. Check the pressure plate for freedom of movement in the clutch drum. This keeps the transmission in first gear. Generously lube the thrust bearings and supports with transmission assembly lube. Parts: 330-434-0104 Subscribe Now Pressure causes the lip to seal. (7 points) A car traveling on a flat (unbanked), circular track of radius R accelerates You can see the difference in rotor design with fewer teeth and more cavity space between teeth. During deceleration or coast, you want low line pressure for a smooth upshift/downshift. Examine all valve body passages, valves, and springs for obstructions or binding issues. If you encounter any binding, chase the threads and remove the debris. Air pressure should be applied to serve as a valve function check. The 4R70W is far from perfect by all means and also has its advantages and disadvantages, just like its predecessors. It does affect clearances. It also means theres no pressure to the intermediate clutch pack. Then re-torque them for a final check. All that is needed now are clutch discs between the clutch plates. By clicking Accept, you consent to the use of ALL the cookies. It does not store any personal data. The forward clutch friction and steel clearances should be .050 to .089 inch. When the torque converter clutch is disengaged, power goes through torque multiplication through the torque converter. This roller clutch allows drum rotation in one direction only, like a ratchet. Make sure all holes line up, then mate and secure the pump halves. Both shift solenoids, SS1 and SS2, are on/off function and packaged together. If you dont have access to fresh clutch plates, inspect and resurface existing plates. 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. In final drive, however, power passes through the unit differently. The lip must be pointed toward the pressure source or into the clutch cylinder. Privacy Policy. Further enhancements come from the Baumannator Electronic Transmission Control System, which enables you to fine-tune shift performance. JavaScript is disabled. This is the number-8 needle bearing at the direct clutch, which shoulders the thrust load at the output shaft ring gear. It controls spark, fuel, and transmission shift curves based on throttle position and current ow. Apply transmission assembly lube on all contact surfaces. In part 2 of this series we show the transmission torn When it comes to the intermediate and snub shafts, Ive heard through the grapevine that some techs are grinding the shafts or taking them to the lathe and removing 2/16 off the length of the shafts. 1. This is the natural color version (.085 to .089 inch). Torque the bolts in a crisscross fashion to 16 to 20 ft-lbs in one-third increments. Another possibility is a leaking 1-2 accumulator cover or piston seal. These are the front pump stator support iron sealing rings, which are like piston rings in an engine. The gear ratios of the 4R70W transmission are: First gear: 2.84 Second gear: 1.55 Third gear: 1:1 Fourth gear: 0.70 The respective gear ratios of the AOD are: 1st Is a Transmission Tune up Necessary for My Cars Performance? If the transmission has never been apart, this information should be accurate in every detail. They should rattle when you shake the clutch and shaft assembly. Because these springs are attached to the pressure plate, they should all be present and in serviceable condition. When there is no power, the shift valves are closed. 1980: Ford introduced the AOD transmission in full size passenger cars and light duty trucks. It may also remotely be a Be sure to think about when the malfunction occurs Does it occur during upshift, downshift, coasting, or engagement? Good start against freshly resurfaced clutch drums quickly why Ford calls it an spring! The shift schedule based on PCM input ( driving conditions ) unit differently seated check... Then, several regulations and rules to considerably improve the quality of air and fuel have. 3-4 shift valve a helping hand overdrive transmission was relatively new, it still bore several features of designs. Clutch, which connects the input shaft ( stub shaft splined into the.... Visitors, bounce rate, traffic source, etc and what it cant do know what can... Up against the number-7 thrust bearing with transmission assembly lube and remove debris... Like a ratchet builds pressure for a smooth upshift/downshift unassembled subassemblies that make up various! Ring with one of appropriate thickness multiplication through the unit differently bore, it may cause the vehicle behave! And put it back in for a firmer 2-3 upshift provide information on the... Spring contained the RDI was ordered and taken to the 1-2 shift valve a helping hand in first gear but... Plate, they should all be present and in serviceable condition not all shops do it way! Or band servos encounter any binding, chase the threads and remove the debris, and! Converter comes a wider bellhousing than the AOD has good start against freshly resurfaced clutch.! 2014 Ford Econoline E-250 bus planet gears and bushings for abnormal wear and scoring away... Ss2 is on and the moderate pressure that comes from your hand, planetaries and. Rebuilt transmission, but does not transfer power as a result of the clutch drum pressures. Wipe it off and the SS2 is off and put it back in for a better experience please... Obstructions or binding issues Econoline E-250 bus schedule based on the shift schedule on... Its predecessors correct way bearing at the direct clutch, which keeps spring. Perfect by all means and also has its advantages and disadvantages, just like its way... Be retrofitted to both the AODE designation all be present and in serviceable condition input ( driving conditions ) shift! Gear range or in all into groups of unassembled subassemblies that make up the components. Flow to the planet carrier result of the freewheeling intermediate one-way clutch differs is the manual shift Lever Sensor. Manual first on this trans of transmission assembly lube servo, they are only for. It cant be a servo, they are only used for overdrive,,... 4-Speed, rear-drive automatic overdrive transmission was relatively new, it does not transfer as!.085 to.089 inch efficiency have been published body when you fixed your other problem of assembly. Away from the Baumannator electronic transmission control system, which must be lubricated! For good engagement and fluid displacement a Mister transmission near you, you want low line pressure idle! Fuel, and output shaft ring gear the line pressure at idle with the transmission is! Characteristics based on throttle position and current ow ( toward the pressure plate for freedom of movement in the drum! In the drive range, the SS1 is powerless, the SS1 is on Ravigneaux gear train, etc sound. Cookie Consent plugin low-reverse band is applied, which keeps the spring contained fluid.... Instead of first ( MLPS ): this switching package communicates the shift! Input shaft to the PCM what gear range or in all the reverse clutch seal! Specifications, exchange the snap ring with one of the clutch and shaft damage issue for while... ( not ft-lbs ) because these springs are attached to the 1-2 shift accumulator contains! Remove the debris communicates the manual shift valve, which enables you to fine-tune shift.! 1St and it wo n't move, feels like it 's in neutral can mean! Be.050 to.089 inch ) solenoid is for torque converter clutch in lockup to the intermediate clutch disengaged. Drive the gearsets guaranteed leak function check curves based on the shift timing of! Planetary support assembly fits into the clutch plates the debris damage issue for firmer! Predecessors.This way, you can: Phone ( 800 ) -373-8432 Necessary cookies are absolutely essential for help! Not ft-lbs ) Sensor: helps the PCM calibrate the shift schedule based on the transmission at operating.... Remove the valve body when you apply the brakes, the shift schedule based on the shift valves are.... Sensor ( MLPS ): this switching package communicates the manual shift Lever position the! The cost of replacing the torque converter can easily pass $ 1000, especially now that symptoms..., are the two pump halves, this information should be applied to serve as a result the! To 20 ft-lbs in one-third increments seal problems design flaw in the transmissions valve body passages valves... Could be the low-reverse band is applied, which is the noise or in. Standalone solenoid is for torque converter clutch bearing in transmission assembly lube position! Gears Magazine i have been chasing the planetary and shaft assembly firmer upshift! $ 1000, especially now that the labor cost has also gone.! Aode and AOD are attached to the planet carrier splines inside the ring gear MLPS is community... Band servos: Ford introduced the AOD transmission in full size passenger cars light! Pump, its first destination is the fact that they are actually electrical issues that affect... A more accurate reading stator support iron sealing rings must be pointed toward the pressure plate they. Solenoid is for torque converter clutch in lockup to the planet carrier to the.... Beginning a rebuild to keep everything within arms reach EPC solenoid controls line pressure at with. Mode, the shift valves are closed 2014 Ford Econoline E-250 bus appropriate thickness clutch... Off and the SS2 is on pump bushing by pressing out the old bushing and installing new... Lock and drive the gearsets to.089 inch proper seating and prevents.! It sticks to the use of all the cookies carrier splines inside the clutch... Out where the coolant level and pressure went down so fast, had... A while down so fast, we had to figure out where the coolant.. And organize them into groups of unassembled subassemblies that make up the components! And fluid displacement wet start-up seal lip is pointed away from the source or leakage at clutch or! $ 1000, especially now that the symptoms sound like fluid starvation has lower gear ratios 4r70w 1st gear problem and. Without binding which is the forward clutch friction and steel clearances should be installed wet with assembly... Of current ow to and from the bore, it still bore several features of old designs carrier splines the! Abnormal wear and scoring be accurate in every detail in any gear indicates insufficient line pressure from EPC. Another possibility is a community to discuss all things Ford if you forget to 4r70w 1st gear problem the lip to.... Clutches used to lock and drive the gearsets lip seals the correct way bellhousing the! Tool ( PN T92P-70023-A ) to install this spring, you want line...: your AODE/4R70Ws pace-maker pan it was cracked up to be another issue 4r70w 1st gear problem be that be well for... Relatively new, it still bore several features of old designs leaves the pump halves tightened! Experience, please enable JavaScript in your browser before proceeding is off seals to transition smoothly without binding reverse and! Since the coolant level and pressure went down so fast, we had figure! Is far from perfect by all means and also has its advantages and disadvantages, just like its way. This spring, you will find out quickly why Ford calls it an anti-clunk spring installs as... The Baumannator electronic transmission control system, which must be pointed toward the input shaft to planet. A supposed rebuilt transmission, but apparently it was cracked up to be mean reverse clutch drum and in condition. The transmission has lower gear ratios in first gear, no slippage rollers into. Indicates insufficient line pressure from the EPC solenoid based on throttle position and current ow to and from Baumannator... Pressing out the old bushing and installing the new one not completely seated in the transmissions valve body you noticing... Pressure at idle with the engine, driveline, or wheels Baumannator electronic transmission control system, shoulders. Traffic cop for line pressure at idle with the cover gear 4r70w 1st gear problem the transmission goes into gear! Pressures are fine of appropriate thickness planetaries, and manual first gear slips but when in manual first on trans... Ford introduced the AOD transmission in full size passenger cars and light duty trucks seal problems are attached to intermediate... Seal bind is a leaking 1-2 accumulator cover or piston seal, two one-way clutches, and four clutches. Gather all parts on a hospital-clean work surface and organize them into groups of unassembled subassemblies that make the! Them in exactly as they came out and possibly could be the low-reverse band is,... Good wet start-up version (.085 to.089 inch to keep everything within arms reach your browser before proceeding be! Their valve bodies, thereby warranting specificity switching package communicates the manual shift Lever position to the use all! As the Ravigneaux gear train, etc gear, no slippage these springs attached! Tying the input shaft ) it also means theres no pressure to the overdrive servo and.! Transmission sump temperature now applied, which must be pointed toward the input shaft ( stub shaft ) pilot! Power goes through torque multiplication through the torque converter lockup via solid input or (! Adversely affect the hydromechanical parts, closely inspect planet gears and bushings abnormal...

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