Do the 96-99 Bonnevilles use the same transmission? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-28-2009, 06:01 PM   #1
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Post Do the 96-99 Bonnevilles use the same transmission?

I might just put a used one in my car, but the guy said to make sure I get one that has the same amount of sprockets, same gear ratio. Do all the transmissions fit in the car? [Even the HD?]

If they're different, how do I know which one my car uses?
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Old 05-28-2009, 06:34 PM   #2
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The 96 uses the 4T60HD, 97-99 uses 4T65E HD

While there are some differences your car could be upgraded to a 4T65HD with a 97 pcm, and 5 wires added to the pcm connector.
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