NEW 1-2 BAND ASSY. DOES NOT REQUIRE 1-2 BAND STOP

MODELS AFFECTED: ALL 1984-90 MODELS EQUIPPED WITH HYDRA-MATIC 4T60 (THM 440T4) TRANSAXLES

BULLETIN COVERS: (Figure 1)

A new style 1-2 band assembly is currently used in production in all Hydra-Matic 4T60 (THM 440T4) transaxles. The area on the new 1-2 band assembly where the 1-2 band apply pin engages is almost twice as wide as the previous style. This increased area makes for a larger "target" for the 1-2 band apply pin and eliminates the need for the 1-2 band stop.

The 1-2 band stop was used to keep the 1-2 band assembly from shifting from its location, causing the 1-2 band apply pin to miss the band when applying, creating a loss of drive.

SERVICE PROCEDURE:

The new style 1-2 band assembly can be used to service past model cases, but the 1-2 band stop must be removed.

IMPORTANT: Use of the new 1-2 band assembly without removing and discarding the 1-2 band stop could cause premature transaxle failure.

DATE OF PRODUCTION CHANGE:

Use of the new 1-2 band assembly in production began January 16, 1990 (Julian Date 016).

SERVICE PARTS INFORMATION:

Part Number Description Model Year/Model Usage ----------- ----------- ---------------------- 8668984 Pkg. 1-2 Band Assembly 1984-90 All - 1-2 Band Assembly - Instruction Sheet

Parts are currently available from GMSPO.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.