Torque Converter - Surge At 45-55 MPH

90amcjeep04 Models

1989-90 B2 Body


Subject

Surge at 45-55 MPH
- Vehicles Equipped With 1.5 Liter Engine and Automatic Transmission


Index

DRIVEABILITY


Date

May 21, 1990


No.

18-52-90

P-1426 (C18-13-0)
BODY CODE LEGEND

B2 - SUMMIT


SYMPTOM/CONDITION

The torque converter on this car is not a full time lock-up torque converter. In normal highway operation, the torque converter will lock and unlock about once every second. This results in a normal three percent torque converter slippage which reduces the amount of engine vibration transmitted into the chassis of the vehicle. If this lock/unlock action is too abrupt, it may cause a surge between 45 and 55 mph.


PARTS REQUIRED

8 Quarts Mopar ATF type 7176 PN 4467721 (quarts)
PN 4467722 (gallons)
1 Transmission Pan Gasket PN MD707183
1 Differential Drain Plug Gasket PN MF660035


REPAIR PROCEDURE

This procedure outlines replacing the transmission fluid with Mopar 7176 ATF.

1. Remove the oil cooler return hose from the transmission. This is the hose that exits the bottom left side (driver's side) of the radiator.

2. To drain the transmission fluid, place the hose into a suitable container and with the transmission selector in neutral, start the engine and let it idle.
NOTE: THE TRANSMISSION MUST BE IN NEUTRAL AND NOT PARK OR THE TRANSMISSION WILL NOT DRAIN PROPERLY.

3. Shut off the engine when the fluid stops coming out of the hose. DO NOT ALLOW ENGINE TO RUN FOR MORE THAN ONE MINUTE, EVEN IF FLUID IS STILL FLOWING FROM HOSE.

4. Remove the transmission oil pan and differential drain plug. Allow the fluid to drain out of the unit.

5. Clean the mounting surface of the oil pan and using a new gasket, reinstall the oil pan. Tighten the bolts to 96 in.lbs. (11 N-m). Using a new gasket, reinstall the differential drain plug and tighten to 23 ft.lbs. (33 N-m).

6. Lower the car and install six quarts of Mopar type 7176 ATF into the transmission.

7. To purge the old fluid from the torque converter, again place the cooler hose in a suitable container. Place the transmission in neutral, start the engine and then let it idle. Stop the engine when the fluid stops coming out of the hose. DO NOT ALLOW ENGINE TO RUN FOR MORE THAN ONE MINUTE, EVEN IF FLUID IS STILL FLOWING FROM HOSE.

8. Reinstall the cooler hose onto the transmission.

9. Install some of the remaining Mopar 7176 ATF into the transmission until the unit is filled to the proper level. The transmission should be at normal operating temperature when checking the fluid level. Remember to cycle the transmission selector through each driving range several times before checking the fluid level for the final time.


POLICY: Reimbursable within the provisions of the warranty.


TIME ALLOWANCE:
Labor Operation No. 21-55-01-93 1.0 Hrs.


FAILURE CODE: 30 - Surge