REVISED:2/3 SHIFT/LOSS OF 3RD THM 440-T4 3RD CLUTCH SEAL

MODELS AFFECTED: 1984-1986 T M 440-T4 (ME9)

BULLETIN COVERS:

A long and/or delayed 2-3 shift on a THM 440-T4 transaxle may be caused by a leaking 3rd clutch inner seal (Figure 1, Item 635A). A new, thicker seal is used in production and available in a Service Package.

DATE OF PRODUCTION CHANGE: (REFER TO FIGURE 2) ------------------------- September 1, 1986 (Julian Date 244), new 3rd clutch inner seal. This change is also on all Service Replacement Transmission Assembly (SRTA) models effective November 15, 1986 (julian Date 319).

SERVICE ACTION:

Remove transaxle, disassemble, inspect and replace the 3rd clutch inner seal, as well as other parts included in the appropriate Service Package.

SERVICE PARTS INFORMATION:

The new 3rd clutch inner seal (Part Number 8644919) is included in the following Service Package.

PACKAGE NUMBER DESCRIPTION -------------- ----------- 8646991 Package - Input Housing & Shaft Assembly

This package includes the following parts-

PART NUMBER DESCRIPTION ------------ ----------- 8645932 Input Housing and Shaft Assembly 8644919 Seal - 3rd Clutch Piston Inner 8662676 Roller Assembly Complete - 3rd Clutch

SERVICE MANUAL REFERENCE:

Refer to the THM 440-T4 (ME9) Automatic Transaxle Unit Repair Table of Contents for 3rd clutch service information.

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.