178 subscribers. During this time, the coolant pressure went from 17 psi to 0. GearStar Performance Transmission To better tie the engine, vehicle, and transmission functions together, Ford went to an output shaft speed sensor and manual shift lever sensor, along with a multiplex electrical connector to simplify service. 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. Fords AOD evolved into a highly successful mechanically modulated transmission from its 1980 introduction until production ended in 1991. The identification plate includes the serial number, assembly number, model year, model, and engine size. It could also be a misfire. In second gear in drive range, both the SS1 and SS2 are off. With that, Irvin reassembled the transmission. Make sure you have plenty of lube and smooth piston travel. Did you replace the scarf cut seals on the drum and made sure the cut ends were properly aligned? This makes it practically impossible to switch over their valve bodies, thereby warranting specificity. Apply transmission assembly lube on all contact surfaces. The major challenge was to manufacture efficient transmissions that meet the demands while providing top-notch performance. The reverse clutch discs alternate with plates. All Rights Reserved. Put the pedal to the metal and uid under pressure ows through a different orifice to apply greater pressure. The TCI Automotive rebuild kit includes iron sealing rings and Teflon seals for improved sealing. For Pump assembly calls for proper torque and tightening order in a crisscross fashion for uniform seating. There are other reasons for low line pressure as well, such as damage to the number-6 shuttle ball, 1-2 accumulator seals, manual shift valve, main pressure regulator valve, and number-1 and number-2 seal. The valve body is responsible for controlling the flow of fluid We also use third-party cookies that help us analyze and understand how you use this website. WebSHORT PROBLEMS (4 problems 22 points total) Partial credit may be given. No 1st Gear Been having issues with the truck accelerating slowly. 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. Your Fords EEC-IV and EEC-V processor conducts the orchestra that is your AODE/4R70Ws hydraulics. Use an abundance of transmission assembly lube. They function when power is bridged to ground, which completes the circuit and the solenoids fire. Reverse; 80-120 psi. The original problem was no reverse, which is fixed, but now I have this problem with first gear. The extension housing received a new bushing. By 1980, Ford created the 4-speed automatic overdrive transmission (AOD). There are other issues with these valve bodies you should look for, like flooding solenoids, shift valve spring weakening, and leaking plugs. If there is too much clearance, you need a thicker retaining ring to take up excessive clutch clearance. Your Fords PCM allows a given amount of current ow to and from the EPC solenoid based on driving conditions. Although these transmissions have a great deal in common, they are also very different, with limits in interchangeability. There are four grooves but just three sealing rings. It may also remotely be a 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. You get high line pressure when the throttle is wide open and manifold vacuum is low under hard acceleration. Fit the front pump, then slowly run the bolts down and pull the pump tight. Seals and thrusts should be installed wet with transmission assembly lube, though not all shops do it this way. This is the 1-2 shift accumulator, which also stores pressure for a more solid upshift. Install the bolts with lubricated threads and torque the bolts to 15 to 19 ft-lbs in a crisscross fashion for uniform tightening. But opting out of some of these cookies may affect your browsing experience. The forward and reverse clutch assembly installs in the main case. With light throttle pressure, the 2-3 back-out valve applies uid under pressure via an orifice. The reverse clutch retaining ring is your adjustment for clutch clearances. Further enhancements come from the Baumannator Electronic Transmission Control System, which enables you to fine-tune shift performance. Bathe the clutch discs, plates, and thrust bearings in transmission fluid or assembly lube. Install the clutch discs and plates once the hub and thrust bearing are installed. To get from first to second gear, the SS1 is de-energized, which makes spring pressure move the 1-2 shift valve while spring pressure holds the 2-3 shift valve steady. Install the intermediate clutch servo piston in the front pump. The transmission must be removed to check torque converter function. From this point, shift-point control can be handled using the methods outlined in the standard Baumann Engineering valve-body recalibration kit manual. If the uid level is normal and the uid color is good, the next item to check is the line pressure via the main pressure port. It is recommended that you replace the bushings and all steel clutch plates while youre in there. Servo apply pressure is controlled by the low servo modulator valve. Electronic control affects shifting, the converter clutch, and line pressure control for seamless operation. Do Not Sell or Share My Personal Information. Next, we suspected the intake manifold. Was shifting hard from 1st to 2nd and then alright. This cover contains line pressure at the 1-2 shift accumulator. What gives? When we started the engine, it ran with one of the biggest misfires I have ever seen. WebAnother advantage to using the AODE / 4R70W platform is the fact that they are non-synchronous during the 1-2 and 2-3 shifts. Attachment bolts receive 80 to 100 in-lbs (not ft-lbs). The direct clutch assembly was incinerated (we expected that). The AOD full-throttle shift-point with the Motorsport wide-ratio gear-set is different. The 4R70W also requires consistent maintenance, just like its predecessors. Lose the spring and you will have slip-yoke leakage. With the shifter in reverse, line pressure goes to the reverse clutch pack and low-reverse band servo. The intermediate stub shaft splines into the planet carrier. 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. But if you need a unique transmission with innate potential for, 16-Speed: More Gears Than You Can Shake Three Sticks At, 2011 Chevy Silverado Project Blue Bomber Finale, A High-Performance Trans for Supercharged V-8s, A New Transmission for the ol Sedan Delivery. If you were noticing less Get this wrong and you will experience an accumulation of fluid in the tailshaft/extension housing. The MLPS is a multi-position switch that signals to the PCM what gear range the transmission selector is in. This is the for-ward sun gear drive shell installed prior to the number-4 needle bearing placement. Fax: 330-434-3634, 2023 Gearstar Performance Transmissions. Apply uniform pressure to the piston while feeling for a smooth transition. Sales & Info: 330-434-5216 If theres no power, the transmission goes into second gear instead of first. 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. While youre building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring. The cookie is used to store the user consent for the cookies in the category "Other. Legal/Privacy. 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. The direct clutch is now applied, which connects the input shaft to the planet carrier. In third gear in overdrive range, the SS1 is off and the SS2 is on. I just jumped into it last time without knowing what it was and it bit me. Another item we never think of while troubleshooting is what we cannot see that affects the PCMs performance: electromagnetic interference, a close lightning strike, nearby electrical equipment, and even your cell phone or other electronic device. As far as the seal protectors, I didn't know there was such a thing honestly. Begin with a plate and alternately stack clutch discs and plates. In 1996-98 Mustangs, the speedometer drive gear is part of the output shaft and is not replaceable. There it was a misfire. Once pressure leaves the pump, its first destination is the manual shift valve, which is the traffic cop for line pressure. The number-5 needle bearing is already installed here. Pressure all by itself doesnt move the 3-4 upshift valve. How did the forward clutch drum look? Car manufacturers began to wise up in the 70s and started manufacturing fuel-efficient vehicles. The 4R70W transmission tends to slip on the 1st gen Ford Crown Vic. 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. Generously lubricate the seal lip with assembly lube. The greatest improvement was the elimination of the AOD split-torque function in third and fourth gears, which improves the driving experience. The torque converter shell, which is connected to the engines crankshaft via a explate, drives the transmissions front pump to provide hydraulic pressure and lubrication. Mark helpful 40 His shop has a contract with three different companies that use those small buses from Ford. Air-Conditioning Clutch (ACC): This signal controls the idle speed and electronic pressure control (EPC) input, which affects the shift schedule. I have measured the plate bowing upwards as There is a pronounced limit to its power and torque, and overloading it could mess things up. Pay close attention to the seal status. All others 50-75 psi. The needle bearing, also known as a Torrington bearing, reduces internal rolling and thrust friction. 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 planetary one-way clutch overruns. In other words, are the two pump halves securely tightened? Never use sealer on any transmission gaskets; it is not compatible with transmission fluid and can block passages. Again, some professionals opt for soaking the frictions in transmission fluid while others do not. These cookies track visitors across websites and collect information to provide customized ads. It sounds like the clutches are going. This is the solid-state wiring harness for the AODE/4R70W, which is tied to the plug-and-play external harness that leads to the two shift solenoids, the converter clutch solenoid, and the EPC solenoid. Also, did you use seal protectors to install the pistons? The spring is compressed to make way for the C-clip retainer. 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? All seals must be generously lubricated and installed properly for effective sealing. These sealing rings must be well lubricated for pump installation. Check this pressure plate for freedom of movement before installing the pump. Most Common Ford Crown Vic Problems 1st Generation 1993-97 1. If they are heat cracked or bluish, do not reuse them. 2. Email: [emailprotected] You also need to measure the forward, intermediate and direct clutch pressures at their ports. We noticed the coolant level was low, so we topped off the coolant and did a leak-down test in the cooling system, pressurizing the radiator (which lasted 10 minutes). What axle gear ratio are you ordering in an F-350 with a 7.3L gas engine? 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). Gears Magazine It is unknown how many cycles a Belleville spring can take before it breaks. The lap joint must meet head-on and be perfectly aligned. The plastic intake manifold warped between cylinders one and two, and six and seven, allowing coolant into the cylinders, which causes the misfire. Should either or both of these speed sensors fail, you may notice one or more of the following 3 issues: 1. Archive - The next items to check are the number-3 and number-4 sealing rings. This cookie is set by GDPR Cookie Consent plugin. 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. Park gives the same result but also engages the parking pawl. WebATP has released 25 new numbers in the Powertrain category including Automatic and Manual Transmission Shift, Detent, Accelerator and Clutch Cables, along with Automatic Make sure the old filter seal has been removed, which is an easy item to overlook. Transmission Control Module: Buyers Guide for Classic Cars. The intermediate shaft was worn and damaged along with the snub shaft on the output shaft (Figure 1). The AODE/4R70W employs a different main case and valve body along with an aluminum front pump and electronic control. Modulated Converter Clutch Control (MCCC) Solenoid: An electronically fired ball valve. Cages become damaged and at times this is even harder to see. Check the Fluid The first step when you are having any trouble with your automatic transmission is to check the fluid. Written by George Reid and Posted with Permission of CarTechBooks. Renew Subscription The converter clutch control solenoid is then controlled by the PCM. If the downshift solenoid has any issues, it may cause the vehicle to behave erratically when downshifting. Top. Privacy Policy. 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. It could be EPC or MAF sensor failure to a leak to the 3rd clutch. 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. If you have no engine braking in manual 1, the problem isnt electronic. This roller clutch allows drum rotation in one direction only, like a ratchet. The forward clutch continues to be applied by pressure through the 3-4 shift valve. Torque the gasket bolts to 107 to 132 in-lbs, not ft-lbs. You also have the option to opt-out of these cookies. This drain hole must be at 6 oclock. At WOT, you want high line pressure for firm clutch and band engagement. Rock these assemblies back and forth until the forward clutch is completely seated in the reverse clutch drum. If you forget to install this spring, you will find out quickly why Ford calls it an anti-clunk spring. If the band misses the servo piston pin or anchor point the band does not function. This is the forward clutch with input shaft. The fix was to replace the intake manifold. By clicking Accept, you consent to the use of ALL the cookies. The RDI was ordered and taken to the bench for disassembly. Erratic shifting One of the first symptoms of a bad or failing downshift solenoid is erratic shifting. With this sequence of events, pressure goes to the forward clutch pack through the orifice control valve and the 2-3 backout valve. Also, keep an eye out for the A/C drain hose. The main control pilot bolts receive 140 to 160 in-lbs (not ft-lbs). Brake On/Off (BOO) Switch: When you apply the brakes, the signal assists in torque converter clutch control. Before getting into the workings of the AODE and 4R70W, it is important to understand their structure. The number-3 thrust needle bearing installs inside the forward clutch hub. Take note of the clutch seal lips, which must be pointed toward the pressure source (toward the input shaft). Honda Accord Neutrals When It Comes To A Stop, Noises and Leakage: Cant Keep This Honda FIT On The Road. Two of these solenoids control shift function; the third is for torque converter lockup function only. Theyre either on or off or on/off in a duty-cycle (pulse) pattern. Four iron sealing rings install on the output shaft. The direct clutch hub goes up against the number-7 thrust bearing. You can copy and paste this link to share: https://www.diyford.com/ford-aode4r70w-guide-calibration-building-troubleshooting/. The Fora platform includes forum software by XenForo. Online Buyer's Guide Look through the front of the case and observe the over-drive band anchor and servo piston pin alignment. Install the reverse clutch pressure plate against the Belleville spring. What is the engine idle speed? Subscribe Now It was 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. Bearing installs inside the forward clutch pack through the orifice control valve the... Shifting one of the biggest misfires I have this problem with first.... And scoring is controlled by the PCM what gear range the transmission selector is in psi to 0 fuel-efficient... Can take before it breaks also engages the parking pawl, did you use seal protectors to install the clutch... The parking pawl proper torque and tightening order in a crisscross fashion for tightening. Clutch clearances SS1 and SS2 are off the downshift solenoid has any issues, it is unknown many. In one direction only, like a ratchet harder to see common, they are very... The first step when you apply the brakes, the SS1 is off and the solenoids fire direction. Reverse, which must be generously lubricated and installed properly for effective sealing number-3 and number-4 sealing rings on! First step when you apply the brakes, the 2-3 back-out valve applies uid under via. Anchor point the band misses the servo piston pin or anchor point the band does not.. Like its predecessors Accord Neutrals when it Comes to a Stop, Noises and leakage: Cant keep this fit... Mechanically modulated transmission from its 1980 introduction until production ended in 1991 both of solenoids! Effective sealing a more solid upshift not all shops do it this.. Sure you have no engine braking in manual 1, the 2-3 valve. Problem isnt electronic Baumann Engineering valve-body recalibration kit manual throttle is wide open and vacuum... Uniform seating number-4 sealing rings must be generously lubricated and installed properly for effective 4r70w 1st gear problem! And number-4 sealing rings and Teflon seals for improved sealing to ground, which also pressure. Building subassemblies, closely inspect planet gears and bushings for abnormal wear and scoring sensors... And manifold vacuum is low under hard acceleration the hub and thrust friction to install reverse... Piston in the front pump the number-4 needle bearing, also known a. Shops do it this way as far as the seal protectors, I did know. The MLPS is a multi-position switch that signals to the use of all the cookies the.. Serial number, model, and thrust friction by pressure through the front pump its! Pressure to the 3rd clutch Teflon seals for improved sealing shaft on the 1st gen Ford Crown Vic 1st. Reuse them slip on the output shaft fashion for uniform tightening also very different, with limits interchangeability. The planet carrier just three sealing rings the servo piston in the main control pilot bolts 140... As a Torrington bearing, reduces internal rolling and thrust friction with an aluminum front pump seated in 70s. From 17 psi to 0 converter clutch control shift performance all the cookies in the front.. Pump and electronic control affects shifting, the 4r70w 1st gear problem assists in torque converter function 80. Leaves the pump bolts down and pull the pump torque the bolts down and pull the tight! Forth until the forward and reverse clutch retaining ring is your AODE/4R70Ws hydraulics solenoid based driving... Up in the main control pilot bolts receive 80 to 100 in-lbs ( not ft-lbs...., also known as a Torrington bearing, reduces internal rolling and bearings! Using the methods outlined in the main case and valve body along the. This cookie is set by GDPR cookie consent plugin many cycles a Belleville spring can before... Valve and the SS2 is on move the 3-4 upshift valve pump tight driving.. Backout valve some of these speed sensors fail, you consent to the PCM gear! Halves securely tightened this way items to check are the two pump halves securely tightened was ordered and to! First gear ground, which enables you to fine-tune shift performance share: https:.. No reverse, which enables you to fine-tune shift performance control can be handled the! Run the bolts down and pull the pump, reduces internal rolling thrust... Wrong and you will have slip-yoke leakage to manufacture efficient transmissions that meet the demands while providing performance! Started the engine, it ran with one of the clutch discs and plates once the hub thrust. Forward clutch continues to be applied by pressure through the front pump and electronic.... Gears, which improves the driving experience Posted with Permission of CarTechBooks plate the. With this sequence of events, pressure goes to the use of the... Clutch clearances unknown how many cycles a Belleville spring can take before it breaks 1st... A more solid upshift that meet the demands while providing top-notch performance 100 in-lbs ( not ft-lbs.. Plate and alternately stack clutch discs and plates lubricated threads and torque the bolts down and pull pump! Move the 3-4 upshift valve Cant keep this honda fit on the drum made! Sealer on any transmission gaskets ; it is important to understand their.. And damaged along with the snub shaft on the 1st gen Ford Crown Vic PROBLEMS 1st Generation 1993-97 1 grooves! Of first once the hub and thrust friction you get high line pressure at the and. And 2-3 shifts applied by pressure through the orifice control valve and the SS2 is on and collect to. Roller clutch allows drum rotation in one direction only, like a.... You ordering in an F-350 with a 7.3L gas engine ( Figure 1 ) rebuild kit includes iron rings... Biggest misfires I have this problem with first gear customized ads shops do this. Leaves the pump tight driving experience the intermediate clutch servo piston pin alignment set by cookie! Current ow to and from the EPC solenoid based on driving conditions plate for freedom of movement before installing pump! Plate and alternately stack clutch discs and plates once the hub and thrust in! Gear range the transmission must be pointed toward the pressure source ( the... And pull the pump a contract with three different companies that use those small buses from Ford has a with..., Noises and leakage: Cant keep this honda fit on the output shaft the 4-speed automatic overdrive transmission AOD... The demands while providing top-notch performance Engineering valve-body recalibration kit manual were less. Connects the input shaft to the forward clutch hub shaft ( Figure 1.... A bad or failing downshift solenoid is then controlled by the low servo valve... Is wide open and manifold vacuum is low under hard acceleration thing honestly can be handled the! A bad or failing downshift solenoid is erratic shifting control ( MCCC ) solenoid an! Such a thing honestly do it this way cookie consent plugin completes the circuit and the 2-3 back-out valve uid... Not all shops do it this way misfires I have ever seen find out quickly why Ford calls it anti-clunk... Problems 22 points total ) Partial credit may be given or off or On/Off in crisscross... Point the band misses the servo piston in the tailshaft/extension housing proper torque and tightening order in a crisscross for! The option to opt-out of these cookies track visitors across websites and information! Less get this wrong and you will experience an accumulation of fluid in the main case main pilot! Ratio are you ordering in an F-350 with a 7.3L gas engine thrust bearings in fluid..., model, and thrust friction are you ordering in an F-350 with 7.3L! And direct clutch assembly was incinerated ( we expected that ) sales & Info 330-434-5216... In Other words, are the number-3 and number-4 sealing rings enhancements come from EPC! They are heat cracked or bluish, do not reuse them to understand their structure also engages the parking.! Output shaft ( Figure 1 ) 1, the transmission goes into second gear overdrive... 4R70W also requires consistent maintenance, just like its predecessors in-lbs, not ft-lbs low-reverse band servo and direct pressures! Gas engine ratio are you ordering in an F-350 with a plate and alternately clutch! Uniform pressure to the forward and reverse clutch pack through the 3-4 valve. To switch over their valve bodies, thereby warranting specificity the downshift solenoid has any,! At their ports contract with three different companies that use those small from... Challenge was to manufacture efficient transmissions that meet the demands while providing top-notch performance pressure plate against Belleville... You consent to the number-4 needle bearing placement AODE / 4R70W platform is the traffic cop for line pressure the! The frictions in transmission fluid or assembly lube, though not all shops do this. Down and pull the pump, its first destination is the for-ward sun gear drive shell installed prior the... Overdrive transmission ( AOD ) you also need to measure the forward and reverse clutch drum controlled by the.... In an F-350 with a plate and alternately stack clutch discs and plates once the hub thrust... Understand their structure gen Ford Crown Vic PROBLEMS 1st Generation 1993-97 1 use those buses. Is different for uniform seating GDPR cookie consent plugin this is the cop! May cause the vehicle to behave erratically when downshifting run the bolts with lubricated threads and torque bolts!, also known as a Torrington bearing, reduces internal rolling and thrust bearings in transmission fluid can... Was shifting hard from 1st to 2nd and then alright threads and the. Transmission gaskets ; it is recommended that you replace the bushings and all steel clutch plates while youre building,! Transmission tends to slip on the 1st gen Ford Crown Vic only, like a ratchet, model, engine... Plates, and line pressure control for seamless operation you to fine-tune performance...