A/T - THM 200C Slow TCC Apply

88olds12

SUBJECT SLOW TCC APPLY - PLUG IN PUMP COVER


MODELS/YEARS 1987 CUTLASS SUPREME EQUIPPED WITH THM 200C (MV9) TRANSMISSIONS

NUMBER: 87-T-71

CORP. REF. NO.: 777145

DATE: July 1988

SECTION: 7A

FIGURE 1 - THM 200C TRANSMISSION NAMEPLATE:

Bulletin Covers:

When a new turbine shaft with a ball capsule was released for production, a plug (Figure 1, Item 222) should have been removed from the pump cover. This plug may not have been removed on all subject transmissions. If the plug is left in, a slightly slower torque coverter clutch (TCC) apply may result. This slightly slower TCC apply is not a durability concern.

FIGURE 2:

Date of Production Change: (Figure 2)

October 8, 1986 (Julian Date 281): New turbine shaft assembly with ball capsule.

December 15, 1986 (Julian Date 349): Plug (222) removed from pump cover.

The plug (222) may not have been removed from the pump cover on a THM 200C built between October 8, 1986 (Julian Date 281) and December 15, 1986 (Julian Date 349).

Service Action:

When servicing the pump on a THM 200C built on or after October 8, 1986 (Julian Date 281), make sure the plug (222) is removed from the pump cover.

NOTE: When installing or servicing a neutral/drive shift package on a THM 200C built before December 15, 1986 (Julian Date 349), make sure the plug is removed from the pump cover. (Refer to Dealer Technical Bulletin 87-T-26). The new turbine shaft assembly with ball capsule is included in the neutral/drive shift package.

Service Parts Information:

Part Number Description Model Applications

8633958 Cover Assembly, Pump (With Plug) All
8638966 Cover Assembly, Pump (Without Plug) All (Except 7CUB
which is not used by
Oldsmobile)