M/T - Proper Fluid
88chevy06Number: 88-158-7B
Section: 7B
Date: MARCH, 1988
Subject: PROPER TRANSAXLE SERVICE FLUID
Model and Year: 1986-88 CHEVROLET MODELS
WITH HM-282 (MG1/MG2) TRANSAXLES
TO: ALL CHEVROLET DEALERS
All 1988 model year HM-282 transaxles (except early introduction vehicles with model codes RRB or 7XBX) are factory filled with synchromesh transmission fluid (STF). This new fluid aids in reducing cold shift effort.
It is permissible and preferred to use synchromesh transmission fluid (STF) in past model HM-282 transaxles.
IMPORTANT: DO NOT REFILL THE HM-282 WITH ENGINE OIL OR AUTOMATIC TRANSMISSION FLUID. THESE HAVE DIFFERENT FRICTION COEFFICIENTS AND DO NOT WORK WELL WITH THE SYNCHRONIZERS, CAUSING GEAR CLASH AND/OR INCREASED SHIFT EFFORT.
PART NUMBER PART NAME
12345349 Synchromesh Transmission
Fluid (1 quart)