A/T - Torque Converter Slip/DTC 628/P0741 Set

Article No.
97-22-4

10/27/97

TRANSMISSION - A4LD, 4R44E/4R55E, 5R55E - TORQUE CONVERTER SLIP - DIAGNOSTIC TROUBLE CODE (DTC) 628 OR P0741 STORED IN MEMORY

FORD:
1985-93 MUSTANG
1987-88 THUNDERBIRD

LINCOLN-MERCURY:
1988 COUGAR

LIGHT TRUCK:
1985-90 BRONCO II
1985-97 RANGER
1987-97 AEROSTAR
1991-97 EXPLORER

ISSUE:
Some vehicles may experience excessive torque converter slippage, torque converter not engaging, or Diagnostic Trouble Code (DTC) 628 or P0741 stored in memory. This may be caused by damage to the fluid pump support seal and/or to the groove on the pump where the seal is located.

ACTION:
Inspect the fluid pump seal for damage. Refer to the following Service Procedure for details.

SERVICE PROCEDURE

1. Follow normal diagnostic procedures as listed in the appropriate Service Manual.

2. Inspect the fluid pump support for damage. If damaged, also inspect the fluid pump support seal groove on the pump.

3. If the groove is damaged, replace the pump.





4. If the groove is not damaged, replace the fluid pump support seal with a redesigned Seal (F77Z-7L323-AA). Refer to Figure 1.

5. Do not replace the torque converter unless it is damaged or fails the criteria listed in the appropriate Service Manual and/or refer to TSB 96-26-12.

PART NUMBER PART NAME

F77Z-7L323-AA Fluid Pump Support Seal

OTHER APPLICABLE ARTICLES: 96-26-12

WARRANTY STATUS: INFORMATION ONLY

OASIS CODES: 501000, 502000, 504000