All THM Transmission/Transaxle Assembliescontrol Valve Assembly: Overview
Number: 86-49Section: 7C
Date: MAR., 1996
Subject: ALL THM TRANSMISSION/TRANSAXLE ASSEMBLIESCONTROL VALVE ASSEMBLY CLEANING/SERVICING PROCEDURES
Model and Year: ALL MODELS WITH THM TRANSMISSIONS
TO: ALL CHEVROLET DEALERS
GENERAL CONTROL VALVE ASSEMBLY CLEANING/SERVICING PROCEDURE
The following information is provided as a recommended procedure for cleaning/servicing all automatic transmission/transaxle control valve assemblies when:
^ Diagnosis indicates a stuck or sticking valve(s).
^ A Transmission/transaxle pump or torque converter malfunction requires a complete unit overhaul.
EQUIPMENT AND WORK AREA
WORKBENCH
^ Must be clean and free of any foreign material (dirt, grease or other contaminants).
^ Work area should be large enough to allow for the disassembly of the control valve assembly and the layout of each valve train.
TOOLS
^ Should be cleaned with solvent before and during the disassembly procedures to ensure they are free of any grease or dirt that may contaminate the control valve assembly.
SOLVENT AND PARTS CLEANING TANK
^ Must be clean and free of contamination from engine or other components.
^ Must be cleaned and filtered if solvent is recirculated.
SAFETY EQUIPMENT
^ Safety glasses and rubber gloves are the minimum requirements to ensure personal safety.