GM B-Body Forum, 77-79 Caprice/Impala Forum

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GM B-Body Forum, 77-79 Caprice/Impala Forum

A forum for all the owners and enthusiasts of General Motors B-Bodies from 1965-1996, but dedicated to the owners of 1977-1979 Impalas and Caprices. Join up now!


    Rear end Swap ??'s

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    MaroonMonsterLS1
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    Newbie

    Posts : 1
    Join date : 2018-08-30

    Rear end Swap ??'s Empty Rear end Swap ??'s

    Post  MaroonMonsterLS1 on Thu Aug 30, 2018 3:46 pm

    I've read this forum a couple times through and found a couple decent threads on this...but nothing with a super definitive answer (and some mixed answers yes vs no) so I'm just starting my own thread to get a clear answer.

    I have a 1987 4 door caprice and it has the weak little 7.5" rear end.

    I'm really wanting to put an 8.5" rear end in. I know that the 94-96 impala ss is the best swap option, but I have searched for a long time and can't find one anywhere even remotely near me.

    I'm hoping someone can help me with a list of 8.5 that can be swapped and what exactly it takes to swap them.
    What vehichles can I look for. G body?? A body??

    Thanks
    terry cronk
    terry cronk
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    Posts : 224
    Join date : 2015-08-19
    Age : 72
    Location : Mid-Michigan

    Rear end Swap ??'s Empty 8.5 swap

    Post  terry cronk on Mon Feb 11, 2019 7:55 pm

    My 8.5 came out of a 1991 Buick RoadMaster w/3.08 gears. I installed 3.73 gears, plus new axles, etc.

    Most of the B-Body cars(Oldsmobile, Pontiac and Buick) used the large 8.5. Check the salvage yards.

    It cost me $175.00 and it came with the rear sway bar.

      Current date/time is Sat Aug 24, 2019 12:59 am