Transmission swap

1989 CHEVROLET SILVERADO
150,000 MILES • 4WD • AUTOMATIC
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BETH PORTER
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Does a 1983 Chevrolet 4x4 transmission fit a 1989 Chevrole 4x4 pickup?
Feb 1, 2019 at 1:54 PM
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JACOBANDNICKOLAS
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Hi and thanks for using 2CarPros.

The transmissions could have both been the 700R4 transmission. If that is the case, confirm that all connections, sensors, harnesses, and everything appears the same. It should work. However, I can't guarantee it. We only recommend direct fit parts. When you change years, anything could be different.

There were two different transmission used in 1989. They are the following:

3L80/3L80HD (400/475) Automatic Transmission
4L60 (700-R4) Automatic Transmission

To identify the one you have, see pictures 1 and 2 for identification tag information. On the 700R4, trans-axle identification information is found stamped into the case pan rail

Picture 1 is the 3L80 and picture 2 is the 4L60 (700R4)
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Let me know if you have other questions.

Take care,

Joe
Feb 1, 2019 at 3:12 PM