A/T - Engagement Delay When Vehicle Unused for 48 Hours
File In Section: 7 - TransmissionBulletin No.: 67-71-48
Date: July, 1996
Subject:
Delayed Engagement (Replace Pump Cover Assembly)
Models:
1995-96 Buick Roadmaster
1995-96 Cadillac Fleetwood
1995-96 Chevrolet Caprice, Camaro, Corvette
1995-96 Pontiac Firebird
1995-96 Chevrolet and GMC C/K, M/L, S/T, G Models
1996 Oldsmobile Bravada
with HYDRA-MATIC 4L60-E (RPO M30)
Important:
GMC Truck dealers should NOT utilize this bulletin for in-warranty repairs. If this condition is experienced, a Goodwrench Transmission Assembly should be used. Refer to Bulletin 367106A, Automatic Transmission Service Procedure Changes, published September, 1995 for in-warranty repairs. Out of warranty repairs may utilize this bulletin.
Important:
Canadian dealers should repair transmissions following established repair practices.
Condition (Figures 1 and 2)
Some owners of the above models, with a HYDRA-MATIC 4L60-E transmission (Built before April 29, 1996/Julian Date 6120), may experience some delayed engagement when vehicle is not used for more than 48 hours.
Cause
Torque converter fluid level low due to fluid drain down.
Correction (Figure 3)
Replace pump cover assembly with the new TCC signal valve assembly.
Parts Information
Parts are currently available from GMSPO.
Warranty Information
For vehicles repaired under warranty, use:
Labor
Operation Description Labor Time
K7121 Replace Pump Use published labor
Cover Assembly operation time.