A/T - 3T40 New Roller Clutch

91buick01

Bulletin 91-73T40-4


Date Feb. '91


Ref. No. 91-104-73T40


Corp. Ref. No 177103


SUBJECT: NEW A/T ROLLER CLUTCH (1980-1991 HYDRA-MATIC 3T40)


MODELS AFFECTED: 1980-85 SKYLARK 1982-89 SKYHAWK 1982-91 CENTURY 1985-91 SOMERSET/SKYLARK

Figure 1:

Figure 2:

BULLETIN COVERS:


A new Roller Clutch for all Hydra-Matic 3T40 transaxles, for increased Lo Roller clutch durability. This new roller clutch has a new spring and roller holding cage which is plastic and black in color. The springs located inside the roller clutch have been rotated to a position of 90 degrees. (Figures 1 and 2)

DATE OF PRODUCTION CHANGE:


This new roller, clutch went into production October 23, 1990 (Julian Date 296) for all Willow Run built models. Windsor built models will be equipped with this new roller clutch at a future production date.

SERVICE PARTS INFORMATION:


This new roller clutch may be used in all prior model year Hydra-Matic 3T40 transaxles. Whenever ordering this new roller clutch, refer to the following part number:

Part Number Description

930681 Roller Clutch Assembly

Parts are currently available from GMSPO.

SERVICE MANUAL REFERENCE:

Whenever replacement and/or installation of a roller clutch is necessary on any Hydra-Matic 3T40, refer to the Unit Repair Section of your service manual.