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

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

Join Now If Your A 1977- 1979 Caprice or Impala owner or other GM B-Body owner!!!
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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 the owners and enthusiasts of General Motors B-Bodies from 1977-1990, but dedicated to the owners of 1977-1979 Impalas and Caprices. Join up now!


4 posters

    transmission cross member

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    samjr1
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    Posts : 2
    Join date : 2017-05-11

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    Post  samjr1 Thu May 11, 2017 6:01 pm

    Looking for a transmission cross member for dual exhaust that will work on a 1983 olds delta88

    Thanks Sam 585-703-6030
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    Boogie1468
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    Post  Boogie1468 Sun Jun 17, 2018 2:01 pm

    Hi Sam. There were no factory crossmembers for dual exhaust until 1995 B bodies got the LT engine.
    You can get a crossmrmber from a 95 or 96 impala or caprice. These are welded Stallings not made from tuning. The mounting provisions on the frame rails are not the same as yours. But adding brackets to your frame is not a terribly big job.
    terry cronk
    terry cronk
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    Post  terry cronk Sun Jun 17, 2018 8:54 pm

    I purchased this piece for my 1979 Caprice when installing either 700R4 or a turbo 350.  Mine was 700R4.

    https://www.ebay.com/itm/G-Force-Performance-RCB3-700-Trans-Crossmember-79-90-B-Body-700R4-4L60E/191786805782?hash=item2ca7626a16:g:cY8AAOSwMqBab5ou

    Yes, its a lot of money but fits and super strong.  The transmission mounts holes are about 3/4" back on the 700R4.

    But the mount hole is slotted.  And the outer holes are slotted and its heavy duty.

    Good Luck.
    GLHS60
    GLHS60
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    Post  GLHS60 Fri Sep 14, 2018 12:48 pm

    I tried to put one of these on my 1981 with TH 350 but was unsuccessful.

    The angle it was on would not fit my frame without serious modification.

    For me the bigger problem was the TH 350 trans wouldn't clear the trans mount "pocket" in the crossmember.

    I added another hump in my stock crossmember to allow dual exhaust.

    I only tried one crossmember from a 1996 Impala, others may be different.

    Thanks
    Randy

    Boogie1468 wrote:Hi Sam.  There were no factory crossmembers for dual exhaust until 1995 B bodies got the LT engine.
    You can get a crossmrmber from a 95 or 96 impala or caprice.  These are welded Stallings not made from tuning.   The mounting provisions on the frame rails are not the same as yours. But adding brackets to your frame is not a terribly big job.

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