Transmission Swap 99 to 92 Bonneville? - 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 07-27-2004, 10:46 PM   #1
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Default Transmission Swap 99 to 92 Bonneville?

I have a 1992 SE that I need to repleace the Tranny on. Question is I need a 4T60E transmission and I have found one in a 1999 Bonneville and a 1991 Grand Prix 3.4L that has the 4T60E. Will they swap over directly or will changes have to be made in order to complete this correctly? The 1999 Bonneville is local and pretty cheap at only 125.00 with low mileage. I would really like this one if it will go. The other is more and I would have to pay shipping.
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Old 07-27-2004, 10:48 PM   #2
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The 99 is a 4t-65 E. Not the same, and some consider it not so reliable. Your best bet would be to get the 91 GP tranny. But for 125 get that 99 tranny, and sell it and make some money!
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Old 07-27-2004, 11:02 PM   #3
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What other vehicles can I look for to swap the tranny from and what years?
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Old 07-27-2004, 11:08 PM   #4
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Pretty much all GM FWD V6 automatic cars thru 96 have the 4t-60E. supercharged cars have a beefier version. Not sure 100% if the HD is compatable.

However you'll need to use your halfshafts etc since not all FWD have the same ones.
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Old 07-27-2004, 11:41 PM   #5
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Quote:
Originally Posted by BonneMeMN
The 99 is a 4t-65 E. Not the same, and some consider it not so reliable. Your best bet would be to get the 91 GP tranny. But for 125 get that 99 tranny, and sell it and make some money!
How much is it worth? It has 50k miles on it.
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Old 07-28-2004, 01:11 AM   #6
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are there certain years that we know of that are for sure the same?
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Old 07-28-2004, 08:50 AM   #7
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When I was doing my investigating for a new transmission for my 93, I was told that the 92 and 93 transmissions are interchangable...and that'* it for those years! 94 began the year of a different pin-out.
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