EL Camino V8-305 5.0L (1984)
Fluid Pump: Customer Interest
Engine - Stops Running When Shifted to Reverse/Drive
Number:
86-55
Section:
6C
Date:
APR., 1986
Subject:
ENGINE STOPS RUNNING DUE TO TCC ENGAGEMENT
WHEN SHIFTED FROM PARK/NEUTRAL TO REVERSE OR DRIVE
Model and Year:
1981-86 THM 200-4R AND THM 700-R4
TO:
ALL CHEVROLET DEALERS
A 1981 through the current production model year vehicle that uses either a THM 200-4R or THM 700-R4 transmission may have a condition where the
engine stops running, or lugs, when shifted from Park/Neutral to Reverse or Drive.
PUMP COVER/CONVERTER CLUTCH VALVE
This condition way be a result of torque converter clutch engagement when either gear range is selected, and may be caused by improper operation of the
converter clutch valve, located in the pump cover (Refer to Figure 1).
RETAINING RING
If this condition exists, inspect the converter clutch apply valve for the following:
^
Not properly seated or missing retaining ring (item 225). When installing this retaining ring make certain the rounded edge of the ring faces
the valve stop (item 226). Refer to Figure 2.
^
Converter clutch valve (item 227) or valve bore having nicks or burrs.
^
Missing, broken or damaged converter clutch valve springs (outer spring item 228 and inner spring item 229).
IMPORTANT:
Prior to servicing the pump assembly for the above condition, make certain that the engine is properly tuned to specifications.
Refer to the appropriate Service Manual for removal and installation procedures.
