V 3500 P/U 4WD L6-292 4.8L (1987)
Technical Service Bulletin # 86164
Date: 860901
A/T Oil Cooler - Updated Flushing Procedure
Number:
86-164
Section:
7A
Date:
Sept. 1986
SUBJECT: 1987 SERVICE MANUAL PROCEDURE UPDATE ALL THM TRANSMISSIONS/TRANSAXLES OIL COOLER FLUSHING
PROCEDURE
MODEL AND YEAR:
ALL MODELS
TO:
ALL CHEVROLET DEALERS
NOTICE:
This bulletin supersedes all transmission oil cooler flushing information previously published in Dealer Service Bulletins, and the THM
440-T4 Service Replacement Transmission Assembly (SRTA) Booklet dated August, 1985.
FIGURE 1 - COOLER FLUSHING TOOL, KENT-MOORE NUMBER J35944
Transmission oil cooler flushing must be performed whenever a transmission/transaxle is removed for service. It is essential to flush the oil cooler after
SRTA installation, major overhaul, if fluid contamination is suspected, or in any case of pump or torque converter replacement. A new, essential cooler
flushing tool, Kent-Moore Number J 35944 (Refer to Figure 1), has been developed to properly flush the oil cooler and will be shipped to GM dealers by
December, 1986. Time allowance for performing the cooler flushing procedure will be included in specific 1987 Labor Time Guide Operations. When
using 1986 and prior Labor Time Guides, add 0.6 hours for cooler flushing to the recondition or SRTA replacement time allowances.
To insure complete transmission/transaxle system service, it is recommended that the flush procedure be performed after the overhauled or replacement
