Grand AM V6-3300 3.3L (1992)
Clutch: Customer Interest
A/T - No Reverse or Slipping in Reverse
Bulletin Number:
93-7-3
Reference Number:
277143
Publish Date:
10/92
Subject:
NO REVERSE OR SLIPPING IN REVERSE (INSTALL NEW RETURN SPRING AND SPIRAL RETAINING RING)
Models
Affected:
1992-93 SUNBIRD, GRAND AM, LEMANS, GRAND PRIX AND TRANS SPORT MODELS
TRANSMISSION APPLICATIONS:
1992-93 HYDRA-MATIC 3T40 (MD9)(THM 125-C)
TRANSMISSION MODELS:
All
CONDITION:
Some 1992-1993 HYDRA-MATIC 3T40 transaxles in Sunbird, Grand Am, LeMans, Grand Prix and Trans Sport models may slip in reverse, or have no
reverse gear.
CAUSE:
Internal fluid leaks in the lo and reverse clutch circuit can cause the lo and reverse clutch piston to partially apply when the transaxle is in a drive gear.
The current return spring load may not be great enough to keep the piston from partially applying.
CORRECTION:
Replace the lo and reverse clutch return spring, spring retainer and snap ring with a new design clutch belleville return spring and spiral retaining ring.
The new clutch return spring has a higher spring rate to keep the piston from partially applying.
SERVICE INFORMATION:
1993 HYDRA-MATIC 3T40 transaxles built beginning July 1, 1992 (Julian Date 182) already contain the new design return spring and spiral retaining
ring.