Beretta V6-173 2.8L (1989)
Seals and Gaskets: Technical Service Bulletins
A/T - 3T40 New Side Cover and Bottom Pan Gasket
Number:
91-71-7A
Section:
7A
Date:
September 1990
Corp. Bulletin No.: 077132
Subject:
NEW SILICONE BEADED SIDE COVER AND BOTTOM PAN GASKET
Model and Year:
1982-90 CELEBRITY, 1982-91 CAVALIER, 1987-91 BERETTA AND CORSICA, 1980-87 CHEVETTE, 1980-85 CITATION
1990-91 U VAN WITH 3T40 AUTOMATIC TRANSMISSION
Figure 1
TO:
ALL CHEVROLET DEALERS
BULLETIN COVERS:
A new Side Cover (25) and Bottom Pan (34) gasket for all HYDRA-MATIC 3T40 transaxles, which reduces the potential for Side Cover and/or Bottom
Pan leaks. These new gaskets are light gray in color and can be identified by a Silicone Bead which is dark orange in color. (Figure 1)
DATE OF PRODUCTION CHANGE:
These new Gaskets went into production July 16, 1990 (Julian Date 197) for all Windsor and Willow Run built HYDRA-MATIC 3T40 transaxles.
SERVICE PROCEDURE:
These new gaskets can be used on all previous model HYDRA-MATIC 3T40 transaxles. Whenever installation or replacement of this new gasket is
necessary, refer to the following procedure.
SIDE COVER GASKET:
1.
Clean ribbed surface of side cover and machined surface of case where gasket is to be installed. Both surfaces MUST be free of transmission fluid.
2.
Place side cover gasket on case with silicone bead facing out.
3.
Carefully install side cover onto gasket and install all pan bolts (7) by hand.
IMPORTANT:
The rib on the pan must fully contact the entire silicone bead; if it does not, leakage may occur.
4.
Torque all pan bolts to 11 N-m (98 lbs. in.).
