A/T - Step Added to Pump Bushing Bore/New Bushing Tool
88olds10SUBJECT STEP ADDED TO PUMP BUSHING BORE/NEW NUMBER: 88-T-55
BUSHING TOOL
CORP.REF. NO.: 877127
1987-88 THM 200-4R (MW9) REAR WHEEL DATE: April 1988
MODELS/YEARS DRIVE CUTLASS SUPREME AND CUSTOM
CRUISER MODELS SECTION: 7A
BULLETIN COVERS:
New pump bushing removal and installation tool. Use this tool when servicing a THM 200-4R transmission built on or after January 9, 1987 (Julian Date 009).
FIGURE 1 - THM 200-4R TRANSMISSION IDENTIFICATION INFORMATION:
FIGURE 2 - THM 200-4R PUMP BODY SHOWING STEPPED BORE:
DATE OF PRODUCTION CHANGE: (Figures 1 and 2)
January 9, 1987 (Julian Date 009): Machined step added to pump bushing bore to prevent bushing "walk out".
SERVICE PARTS INFORMATION:
The above change is incorporated in all service packages shipped with the carton date code B7 or later, and will service all years and models. Refer to current GMSPO catalog for part number information.
FIGURE 3 - THM 200-4R PUMP BODY BUSHING REPLACEMENT PROCEDURE:
SERVICE ACTION: (Figure 3)
Because of the stepped bore in the pump body, removal/installation procedures and tool for the pump body bushing have been changed. Use the new available tool from Kent-Moore (J 25019-20) for removal/installation.
Always take care not to scratch machined surfaces of the pump cover -- protect by placing cloth or cardboard between machined surfaces and the tool as necessary. Apply grease to the new bushing and threaded parts of the tool.
SERVICE MANUAL REFERENCE:
Refer to the THM 200-4R automatic transmission unit repair for pump assembly service procedures. Use Figure 3 to supplement information contained in your 1987 THM 200-4R Unit Repair Section.