A/T - Slow TCC Apply
87buick12Bulletin: 87-7200-9
Date: Nov., '87
Ref. No.: 87-193-7200
Corp. Ref.: 777145
SUBJECT: SLOW TCC APPLY - PLUG IN PUMP COVER
MODELS AFFECTED: ALL 1987 VEHICLES EQUIPPED WITH THM 200C (MV9)
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 converter clutch (TCC) apply may result. This slightly slower TCC apply is not a durability concern.
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.
NOTICE: 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 Corporate Reference Number 777128). 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
8638968 Cover Assembly, Dump (Without Plug) 7CUB