NEW PARTS/ SERVICE INFORMATION 440-T4 TRANSMISSION

MODELS/YEARS: ALL 1984-86 VEHICLES EQUIPPED WITH THM 440-T4 (ME9) TRANSAXLE

This bulletin pertains to:

I. 3rd Clutch Plates II. Input Shaft Seal Eliminated III. Converter Clutch Regulator Valve Spring Eliminated

Vehicle Applications:

1984-86 Cutlass Ciera (A Series) 1985-86 Ninety-Eight (C Series) 1986 Delta 88 (H Series) 1986 Toronado (E Series)

I. 3rd CLUTCH PLATE -------------------

Service Action:

At the start of 1986 production, all Oldsmobiles with THM 440-T4 transaxles were built with single-sided 3rd clutch plates. When servicing 3rd clutch plates on any year/model 440-T4, use the single-sided clutch plates. Refer to Figure 1 for transaxle identification information.

Service Parts Information:

Service Package Number: 8646938

Service Manual Reference:

Refer to the THM 440-T4 (ME9) automatic transaxle unit repair table of contents for 3rd clutch service information.

II. INPUT SHAFT SEAL ELIMINATED -------------------------------

Service Action:

All 1986 model THM 440-T4 transaxies were built without an input shaft to 4th clutch shaft seal. When servicing a THM 440-T4 built prior to 1986, it is not necessary to replace the input shaft to 4th clutch shaft seal. Refer to Figure 1 for transaxle identification information.

Service Manual Reference:

Refer to page 440-T4-32, Figure 34, item 627, 1984 service manual.

III. CONVERTER CLUTCH REGULATOR VALVE SPRING ELIMINATED -------------------------------------------------------

Service Action:

At the start of 1986 production, the converter clutch regulator valve spring (refer to Figure 2, item No. 394) was eliminated on the following models of the THM 440-T4 transaxle: AAH, ACH, ADH, AFH, AMH, ARH, BHH, CFH, CHH, CMH, CNH, HBH and HJH, due to recalibration and fluid passage changes. Do not replace this spring on any listed model, as an increase of the apply feel of the tranaxle converter clutch may result. Refer to Figure 1 for transaxle identification information.

Service Manual Reference:

Refer to the THM 440-T4 (M E9) automatic transaxle unit repair table of contents for control valve amembly 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.