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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!

    4L80E Crossmember


    Posts : 1
    Join date : 2019-05-29
    Location : Iowa

    4L80E Crossmember Empty 4L80E Crossmember

    Post  81Bonnie on Wed May 29, 2019 8:08 pm

    Hey guys, new to the site. I'm going to be swapping out my 700r4 and putting in a 4L80E. I need some help finding a Transmission cross-member. I have a 1981 Pontiac Bonneville. Has anyone ever done this kind of swap before? Ideas where I can get one?

    1981 Pontiac Bonneville
    383sbc ProCharger
    Working on a 4L80E
    9 Inch Ford
    "Praying to the gods of speed"
    terry cronk
    terry cronk
    Auto Enthusiast
    Auto Enthusiast

    Posts : 221
    Join date : 2015-08-19
    Age : 72
    Location : Mid-Michigan

    4L80E Crossmember Empty 4L80 trans swap

    Post  terry cronk on Tue Jun 18, 2019 6:32 pm

    Check out you length from the front of the bell housing on the 700R4 and compare to the 4L80 as to maybe modifying the older one.

    You might be able to slide the crossmember back some to accommodate.

      Current date/time is Wed Jun 26, 2019 10:00 am