Jeep Engine >> CRANK PILOT BUSHING UPDATE ON 1977-93 GM 2.5L
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Jeep Engine >> CRANK PILOT BUSHING UPDATE ON 1977-93 GM 2.5L
Crankshaft Pilot Bushing Update On
1979-93 GM 2.5L Engines
The AERA Technical Committee offers the following information regarding an update on crankshaft pilot bushings for 1977-93 GM 2.5L engines. Previously, AERA published Technical Bulletin TB 477R. The information in this bulletin
is to be used in addition to that bulletin. GM has used six unique crankshaft pilot bushing inserts for their different 2.5L engine applications.
These inserts are pressed into the rear of the crankshaft and provide support for either the input shaft of a standard transmission or direct support of the torque converter hub of an automatic transmission. Use the following chart and
diagrams when selecting a replacement crankshaft insert, keeping in mind GM also supplied engines to the Jeep Corporation for postal use:
Model
Year Drive Model Part # View
1977-81 RWD Postal Jeep J3237088 D
1977-81 RWD Postal Jeep 33004041 E
1977-91 RWD Buick, Olds, Pont, Chevy 10007202 A
1978-93 FWD Buick, Olds, Pont, Chevy 10009785 B
1982-83 RWD Camaro, Firebird w/ auto 10018699 C
1982-83 FWD w/ automatic trans 10018699 C
1982-83 FWD w/ manual transmission 10009785 B
1982-86 RWD Camaro, Firebird w/ manual 10007202 A
1984-86 FWD w/ automatic transmission 10018699 C
1984-86 RWD Fiero w/ automatic trans. 10018699 C
1984 FWD w/ manual transmission 10009785 B
1984-86 RWD Fiero w/ manual trans. 10009785 B
1984 RWD Camaro, Firebird w/ auto 10018699 C- OD 1.498, ID .827
1985-93 RWD GMC, S-10 Chevy 3752487 E
1987-93 RWD S-10 Chevy, w/ manual trans. 10032605
1987-93 RWD Buick, Olds, Pont, Chevy 10007202 A
It is recommended to inspect all crankshafts to ensure that the proper insert is installed to match the desired application. AERA is currently aware of several aftermarket suppliers for some of the above mentioned inserts.
The AERA Technical Committee
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