Engine - Stalls While Engaging A/T In Reverse or Drive
88buick04Bulletin: 88-7125-2
Date: Mar. '88
Ref. No.: 88-082-7125
Corp. Ref. No.: 877113
SUBJECT: ENGINE STALLS WHILE ENGAGING IN REVERSE OR DRIVE. SERVICE INFORMATION ON A NEW DESIGN AUXILIARY VALVE BODY FILTER
MODELS AFFECTED: ALL 1987-88 VEHICLES EQUIPPED WITH THM-125C (MD9) TRANSAXLES
BULLETIN COVERS
A new design auxiliary valve body has a new filter in the TCC feed passage. The new auxiliary valve body filter will reduce the potential of TCC solenoid sticking and the resulting condition of the engine stalling while shifting into Reverse or Drive.
FIGURE 1 - THM 125/125C TRANSAXLE IDENTIFICATION INFORMATION:
DATE OF PRODUCTION CHANGE: (Figure 1)
March 9, 1987 (Julian Date 068), New Auxiliary Valve Body Filter and Auxiliary Valve Body.
SERVICE PARTS INFORMATION
Package No. Package Description
8664921 (1) 8660789 Gasket, Auxiliary Valve Body
(1) 8664847 Gasket, Auxiliary Valve Body (8KDC ONLY)
(1) 8664811 Filter, Auxiliary Valve Body
(1) 8660039 Gasket, Valve Body Cover
(1) 8664922 Instruction Sheet
SERVICE MANUAL REFERENCE
When servicing any 1988 THM 125C transaxle with these parts refer to the 1988 THM 125C (MD9) Automatic Transaxle Unit Repair Section in your service manual.
FIGURE 2 - AUXILIARY VALVE BODY FILTER:
FIGURE 3 - AUXILIARY VALVE BODY GASKET:
SERVICE NOTES (Figures 2 and 3)
The new auxiliary valve body is not interchangeable with models built prior to Julian Date 068, March 9, 1987. The past designed auxiliary valve bodies are not machined to allow for installation of new filter. The auxiliary valve body gasket part no. 8660789 is interchangeable with 1987 and 1988 THM 125C transaxles only. Gasket 8664847 can only be used on 1988 KDC models.