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  1. #1

    Default Crossmember info needed

    I have a 1980 fairmont wagon. Originally a 255/c4 car. I am putting in a 302/aod. What do I do about a trans crossmember?

    Stock moved back?
    Double hump?

    From what I understand I need to have the member further back.

  2. #2

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    Would this work?
    http://www.forgottenfox1.50megs.com/2hump.html
    Would it be back far enough?

  3. #3
    FEP Power Member Zephyr 351C's Avatar
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    Apparently it worked for him.
    -Zach
    '81 Zephyr Sedan: In pieces. Some at the garage, some under my bed, etc...

  4. #4
    FEP Power Member Drg racr's Avatar
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    Interesting. I'll have to remember that when I do my '80 Fairmont wagon.

  5. #5
    FEP Power Member MAD MIKE's Avatar
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    http://www.forgottenfox1.50megs.com/2hump.html =

    Reinventing the wheel since...

    Cantilevering the trans crossmember with a couple of 'end link bolts' is not a solution.

    Get a grinder and a welder, grind off that old bracket, weld on the new one.
    -Michael
    '79 Fairmont 5dr 'car guy safe' MM Tech Tips StopTech Brake Bias StopTech White Papers

  6. #6

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    Yeah, I dunno. I suppose it works, but it's pretty redneck. Mounted in single shear like
    that, those bolts are gonna flex. There's a fair bit of weight on that crossmember to
    be supporting with a 3/8" bolt in single shear.

    I'm with Mike. If you're running an AOD, it's much better to weld on the right brackets.
    Cheers,
    Jeff Cook

    '85 GT Hatch, 5-speed T-Top, Eibachs, Konis, & ARE 5-Spokes ... '85 GT Vert, CFI/AOD, all factory...
    '79 Fairmont StaWag, 5.0, 62K original miles ... '04 Azure Blue 40th Anny Mach 1, 37K original miles...
    2012 F150 S-Crew 4x4 5.0 "Blue Coyote"... 65 coupe, 289 auto, Pony interior ... '67 coupe 6-cyl 4-speed ...
    '68 Vert, Mexican block 307 4-speed... '71 Datsun 510 ...
    And a 1-of-328 Deep Blue Pearl 2003 Marauder 4.6 DOHC, J-Mod, 4.10s and Lidio tune

  7. #7
    FEP Power Member Drg racr's Avatar
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    What I did years ago on my first Fairmont wagon was I made a perch off the back of the original trans crossmember. Once I got it lined up right, I welded it in place and then braced it. It held up longer than the rest of the car.

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