WenmarOpen by Wenmar Pro

Service bulletin 577104

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id39299
Published by NHTSA1995-11-01
Manufacturer's number577104
Manufacturer's date1995-02-01
NHTSA componentPOWER TRAIN:AUTOMATIC TRANSMISSION

NHTSA's summary

HARSH 1-2 UPSHIFTS. *TW

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Transmission and driveline, Automatic transmission

Vehicles listed
BUICK REGAL1993, 1994, 1995
CHEVROLET LUMINA1993, 1994, 1995
CHEVROLET MONTE CARLO1995
OLDSMOBILE CUTLASS1993 to 1995
PONTIAC GRAND PRIX1993, 1994, 1995

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
6771641997-06-27. Service bulletin. INTERMITTENT NEUTRAL OR LOSS OF DRIVE AT HIGHWAY SPEEDS OR FROM FOURTH GEAR (REPLACE CONTROL VALVE BODY ASSEMBLY). *TW
577106A1997-05-27. Service bulletin. COLD START RATTLE NOISE. *TW
MSG011571995-11-01. Service bulletin. UNKNOWN
5771061995-11-01. Service bulletin. COLD START RATTLE NOISE. *TW
CAMP/95C08A1995-01-10. Service bulletin. SUPPLEMENTAL BULLETIN TO CAMPAIGN 95C08. *TW