COMPLAINT: No 4th gear; 2nd and 4th pressure lower than line pressure.
CAUSE:
The cause could be the bleed orifice cup plug missing from the case in
the bottom of the 3-4 accumulator bore (see Figure 1).
CORRECTION: Install bleed orifice cup plug, OEM Part Number 8628864. More Auto Equipment?
THM 440-T4 VALVE BODY GASKET IDENTIFIACTION
1985 and 1985 l/2 model valve body and channel plate gaskets "ARE NOT" interchangeable.
Ink stamped on each gasket is a 3 digit Identification Number, in the location shown in Figure 1.
Refer to the chart in Figure 2 for proper application. Refer to Figure 3 to identify transaxle model.
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Friday, March 15, 2013
Tuesday, March 12, 2013
THM 440-T4 Erratic Or No Upshift
Erratic shifts or no upshift in a THM 440-T4 transaxle may be caused by particles of hardened imprex (TM) material lodging in the governor pressure channel. (Imprex (TM) is an "Impregnation Plastic" used in the manufacturing of cases to help seal the case and minimize porosity.)
Service Action:
1. Remove governor assembly (5) from transaxle and clean with solvent.
2. Inspect governor for binding weights and/or mispositioned springs. To verify operation, turn governor upside down and pour solvent into the governor shaft. Check for leakage past the checkballs. If leakage is noted, replace the governor assembly.
3. Reinstall governor cover (9) without the governor assembly.
4. Start the engine and move the selector lever to drive (D) position. Allow the engine to run for 15-20 seconds.
5. Apply brake, move the selector lever to park (P), and stop the engine.
6. Reinstall the governor assembly (5) into the transaxle and road test the vehicle to verify transaxle operation.
IF ERRATIC SHIFTS OR A NO UPSHIFT CONDITION CONTINUES:
7. Remove and clean governor oil pipe retainer (129), orificed cup plug (127), governor feed and return pipes (125,124) accumulator cover (121) and governor screen (126).
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Friday, March 8, 2013
FORD AXOD - New 10 Checkball Pump And Gaskets
Make certain the correct number of checkballs are installed in their proper locations during the reassembly process. Use the transaxle model tag attached to the top of the converter housing, (See Figure I), for positive model identification. Refer to the following service information for the correct number of checkballs, and proper placement of the checkballs.
VALVE BODY CHECKBALL INFORMATION
The valve body has SEVEN (7) checkballs and the location of the check balls are the same for all models and all years. REFER TO FIGURE 2 FOR LOCATIONS
OIL PUMP CHECKBALL INFORMATION
1986-1990 TAURUS/SABLE, 3.0L Engines, All Models 1989 CONTINENTAL, 3.8L Engines, Models PNA-AB, PNA-AB3 The oil pump body on these models have NINE (9) checkballs. REFER TO FIGURE 3 FOR LOCATIONS
1989 CONTINENTAL, 3.8L Engines, Models PNA-AB4
1990 CONTINENTAL, 3.8L Engines, All Models
1990 TAURUS/SABLE, 3.8L Engines, All Models
The oil pump body on these models have TEN (10) checkballs, and require new pump gaskets that are identified by a "Light Blue" stripe. REFER TO FIGURE 4 FOR LOCATIONS
SERVICE INFORMATION
CHECKBALLS (5 Per Package) ........................................................... E7DZ-7E195-A
PUMP HOUSING TO PUMP SPACER GASKET (10 Ball) .............. E90Y-7G331-A
PUMP SPACER TO VALVE BODY GASKET (10 Ball) ................... E90Y-7A136-A
Figure 1: http://goo.gl/uUDVV
Figure 2: http://goo.gl/DAv4N
Figure 3: http://goo.gl/JFSUW
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VALVE BODY CHECKBALL INFORMATION
The valve body has SEVEN (7) checkballs and the location of the check balls are the same for all models and all years. REFER TO FIGURE 2 FOR LOCATIONS
OIL PUMP CHECKBALL INFORMATION
1986-1990 TAURUS/SABLE, 3.0L Engines, All Models 1989 CONTINENTAL, 3.8L Engines, Models PNA-AB, PNA-AB3 The oil pump body on these models have NINE (9) checkballs. REFER TO FIGURE 3 FOR LOCATIONS
1989 CONTINENTAL, 3.8L Engines, Models PNA-AB4
1990 CONTINENTAL, 3.8L Engines, All Models
1990 TAURUS/SABLE, 3.8L Engines, All Models
The oil pump body on these models have TEN (10) checkballs, and require new pump gaskets that are identified by a "Light Blue" stripe. REFER TO FIGURE 4 FOR LOCATIONS
SERVICE INFORMATION
CHECKBALLS (5 Per Package) ........................................................... E7DZ-7E195-A
PUMP HOUSING TO PUMP SPACER GASKET (10 Ball) .............. E90Y-7G331-A
PUMP SPACER TO VALVE BODY GASKET (10 Ball) ................... E90Y-7A136-A
Figure 1: http://goo.gl/uUDVV
Figure 2: http://goo.gl/DAv4N
Figure 3: http://goo.gl/JFSUW
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Tuesday, March 5, 2013
THM 200-4R - NEW FILTER
Some 1981-87 vehicles equipped with THM 200-4R transmissions' may exhibit a gear noise (whine) prior to the 1-2 shift and possibly during 2nd gear. This condition may be caused by a wear pattern on the front planetary gears. This noise may be reduced by replacing worn gearset parts then checking and adjusting the foward clutch shaft end play and the output shaft end play to the specifications in this bulletin.
TRANSMISSION IDENTIFICATION INFORMATION (Figure 1) Note that the specifications given in this bulletin are at low end of the range printed in the service manual and only need to be used to correct a lst/2nd gear noise condition.
SERVICE ACTION
If worn, replace front internal gear, front carrier assembly and front sun gear. Check ans adjust end play to the following Specifications.
Forard Clutch Shaft: 0.9Omm--1.3Omm (0.035"--0.051")
Output Shaft: 0.32 mm--0.64mm (0.013"-- 0.025)
TRANSMISSION IDENTIFICATION INFORMATION (Figure 1) Note that the specifications given in this bulletin are at low end of the range printed in the service manual and only need to be used to correct a lst/2nd gear noise condition.
SERVICE ACTION
If worn, replace front internal gear, front carrier assembly and front sun gear. Check ans adjust end play to the following Specifications.
Forard Clutch Shaft: 0.9Omm--1.3Omm (0.035"--0.051")
Output Shaft: 0.32 mm--0.64mm (0.013"-- 0.025)
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THM 440-T4 - HARSH 1-2 SHIFT
Some 1985-1987 DeVilles and Fleetwoods and 1986-1987 Eldorados and Sevilles may experience a consistently harsh 1-2 shift condition at any throttle angle and any altitude.
This harsh shift condition may be caused by a blocked or partially drilled 2nd clutch feed passage in the case.
To repair this condition inspect the 2nd feed passage for blockage or in-complete drilling operation. To perform this inspection, remove the transaxle oil pan, filter, accumulator cover (with feed pipes and retainer), accumulator cover spacer plate and gaskets (Figure 1). Inspect the 2nd clutch passage by measuring the depth of the hole, which should be a minimum of 72mm (2-13/16") as shown in Figures 2 and 3.
If the passage is not properly drilled:
1. Remove the transaxle from the vehicle and disassemble components up to and including the channel plate.
2. Mark an 8.5mm (21/64") drill bit at 72mm (2-13/16") from the end using a drill stop or some other acceptable method. From the oil pan side of the case, finish drilling the 2nd clutch passage to the proper depth as marked on the drill bit.
NOTE: DRILLING TO DEEP INTO THE 2ND CLUTCH PASSAGE WILL RESULT IN DAMAGE TO THE CASE
3. Remove metal chips caused by drilling and thoroughly flush the repaired case passages with clean solvent.
4. Reassemble the transaxle.
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This harsh shift condition may be caused by a blocked or partially drilled 2nd clutch feed passage in the case.
To repair this condition inspect the 2nd feed passage for blockage or in-complete drilling operation. To perform this inspection, remove the transaxle oil pan, filter, accumulator cover (with feed pipes and retainer), accumulator cover spacer plate and gaskets (Figure 1). Inspect the 2nd clutch passage by measuring the depth of the hole, which should be a minimum of 72mm (2-13/16") as shown in Figures 2 and 3.
If the passage is not properly drilled:
1. Remove the transaxle from the vehicle and disassemble components up to and including the channel plate.
2. Mark an 8.5mm (21/64") drill bit at 72mm (2-13/16") from the end using a drill stop or some other acceptable method. From the oil pan side of the case, finish drilling the 2nd clutch passage to the proper depth as marked on the drill bit.
NOTE: DRILLING TO DEEP INTO THE 2ND CLUTCH PASSAGE WILL RESULT IN DAMAGE TO THE CASE
3. Remove metal chips caused by drilling and thoroughly flush the repaired case passages with clean solvent.
4. Reassemble the transaxle.
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Friday, March 1, 2013
THM 4L60-E - LACK OF LUBRICATION
COMPLAINT: Vehicle is brought to your shop and has failed because of lack of lubrication. You check the cooler or possibly replace the cooler as a precaution. After replacing the necessary failed parts, the vehicle is returned with the same problem.
CAUSE: The cause may be, a defective pump cover (Stator) from the factory, that was not drilled completely through the "Lube From Cooler" passage, as shown in Figure 1. If this passage is not drilled through, there will be no lubrication to the rear of this unit as all lube must pass through the pump cover (See Figure 1). Every one that we have encountered, and we have seen several, had been drilled just deep enough that the cup plug that seals this passage after drilling was installed in the cover.
CORRECTION: Replace the pump cover as necessary with a new one and inspect every one that enters your shop to ensure no return failures. All of the pump covers we have seen at this point, were the 13 vane variety. Find more useful tools like Lexia 3 PP2000 and digimaster 2 to solve the car problems.
CAUSE: The cause may be, a defective pump cover (Stator) from the factory, that was not drilled completely through the "Lube From Cooler" passage, as shown in Figure 1. If this passage is not drilled through, there will be no lubrication to the rear of this unit as all lube must pass through the pump cover (See Figure 1). Every one that we have encountered, and we have seen several, had been drilled just deep enough that the cup plug that seals this passage after drilling was installed in the cover.
CORRECTION: Replace the pump cover as necessary with a new one and inspect every one that enters your shop to ensure no return failures. All of the pump covers we have seen at this point, were the 13 vane variety. Find more useful tools like Lexia 3 PP2000 and digimaster 2 to solve the car problems.
ALLISON 1000/2000 SERIES - PRELIMINARY INFORMATION
Allison Transmission has now developed a family of two new automatic transmissions, refered to as the 1000 Series and the 2000 Series, for light duty (8600-19850 GVW) and medium duty (19850-30000 GVW) commercial trucks. These two new transmissions are scheduled to start appearing in General Motors vehicles for the 2000 model year and come in two wheel drive and four wheel drive configurations, as shown in Figure 2. Both the 1000 and 2000 Series are available with an optional PTO gear.
The PTO gear is driven off of the torque converter, and thus is turbine driven. Engine driven performance can be obtained by engaging the torque converter clutch during neutral PTO operation. PTO mounting provisions are in the form of a standard SAE 6 bolt pad on each side of the transmissions main case, as shown in Figure 1 and 2. General description and operation begins on Page 3 of this bulletin.
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The PTO gear is driven off of the torque converter, and thus is turbine driven. Engine driven performance can be obtained by engaging the torque converter clutch during neutral PTO operation. PTO mounting provisions are in the form of a standard SAE 6 bolt pad on each side of the transmissions main case, as shown in Figure 1 and 2. General description and operation begins on Page 3 of this bulletin.
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