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Thread: 4L80E in a 90 RCSB

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  1. #1
    Join Date
    Apr 2008
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    4L80E in a 90 RCSB

    I am currently putting a 6.0/4l80 in a 90 rcsb truck and i can't get the tranny crossmember in to where it fits right.
    I thought i had read somewhere that I just neeed to move the crossmember back to the back bolt holes. but it still isn't lining up.

    Any help would be great.

  2. #2
    Join Date
    Nov 2003
    Location
    Denton Texas
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    20,540
    drill new holes if you need to. Thats what I do.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  3. #3
    Join Date
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    I was going to do that but I was worried about keeping it square in there.
    I didn't know if it sat true center or if was farther off to one side than the other?

  4. #4
    Join Date
    Nov 2003
    Location
    Denton Texas
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    it won't be very far off center if it is at all measurable. We've all done it, guys with OBS trucks that are converted.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

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