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Thread: trans cross member help

  1. #1
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    trans cross member help

    My buddy is helping me put a V8 in my 85 blazer he says the stock trans cross member has to be moded have any one of you guys had to do this thanks for the info

  2. #2
    Registered User Myself's Avatar
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    That depends, what trans did it originally have, and what is going back in it?

  3. #3
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    trans crossmember

    im having the same problem and also have an 85 2 door 2wd, mine had the 2.8 motor with the t5 4 speed manual and im putting a t5, 5 speed from a 350 camaro with a small block 350 . any help would be greatly appreciated

  4. #4
    I'm BATMAN! Harley's Avatar
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    This may be a case where you're going to have to bolt the engine and transmission into the truck to see where the trans mount ends up. Get an angle finder and place it on the crank to measure the angle of the powertrain. The bottom of the engine crossmember is a good place to measure against. From the factory this was designed to be parallel to the ground. GM likes to set their motors around 5 or 6 degrees angled down from the factory in my experience.
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  5. #5
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    I just put a 350/350 combo in my 90 Blazer. It had a 4.3 and 700r from the factory. All I had to do was unbolt the drivers side of the crossmemeber, loosen the passenger side and slide it one hole foreword and snug it all back up. It lined up fine. If I remember correctly, when I did the swap on an S10 with the 2.8/metric 200, I had to weld a plate to the existing cross member and redrilled a hole for the tranny mount.

  6. #6
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    i cut my mount and fliped it to the back and welded it up..

  7. #7
    Administrator Blazin Low's Avatar
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    Quote Originally Posted by lt1fourdoor View Post
    i cut my mount and fliped it to the back and welded it up..
    this is what I did for a TH-400 trans
    this is a test of the sig

  8. #8
    5.7L VORTEC 350 blazin4low's Avatar
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    I set my motor as far forward as I could, this allowed me to use the stock cross member in the stock location. I may have filpped it around also, but can't remember. I know I didn't have to cut or redrill anything though.
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