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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

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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

    Trying to find a crossmember

    kansasboy
    kansasboy
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    Trying to find a crossmember Empty Trying to find a crossmember

    Post  kansasboy Sun May 15, 2016 11:07 pm

    What crossmembers have you guys found and or used to run dual exhuast and bolt right up? I want to do an 5.3 LS swap and I'm also trying to decide which transmission to match it unless I can get a 4L60E transmission from a silverado. any input would be greatly appreciated.
    Kit1078
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    Trying to find a crossmember Empty Re: Trying to find a crossmember

    Post  Kit1078 Mon May 16, 2016 12:02 am

    I haven't found a dual exhaust crossmember that will bolt right up. I have a dual exhaust crossmember from a '96 Caprice that was supposed to bolt up, but I can't get it to clear the floor pan on the driver's side. If you can get one and get it to fit, it will work with the 4L60E, as that's what the 94-96 B bodies used. I think there is a company that makes a (rather cheap looking) aftermarket crossmember. I usually just cut an arch in it on the driver's side and then reinforce it to work.
    kansasboy
    kansasboy
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    Trying to find a crossmember Empty Re: Trying to find a crossmember

    Post  kansasboy Mon May 16, 2016 4:13 am

    Kit1078 wrote:I haven't found a dual exhaust crossmember that will bolt right up.  I have a dual exhaust crossmember from a '96 Caprice that was supposed to bolt up, but I can't get it to clear the floor pan on the driver's side.  If you can get one and get it to fit, it will work with the 4L60E, as that's what the 94-96 B bodies used. I think there is a company that makes a (rather cheap looking) aftermarket crossmember. I usually just cut an arch in it on the driver's side and then reinforce it to work.  

    Well if you got it to work, I might give it a try unless I find the god send that magically bolts right up
    terry cronk
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    Trying to find a crossmember Empty crossmember

    Post  terry cronk Mon May 16, 2016 7:42 am

    I recently purchased this unit.  Its heavy duty.  Soon to be installed.  $269.00/shipped

    updated: available now.

    http://www.ebay.com/itm/G-Force-Performance-RCB3-700-Trans-Crossmember-79-90-B-Body-700R4-4L60E-/191786805782?hash=item2ca7626a16:g:lQQAAOSwGotWnj~3&vxp=mtr
    Xtreme Thunder
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    Trying to find a crossmember Empty Re: Trying to find a crossmember

    Post  Xtreme Thunder Mon May 16, 2016 6:40 pm

    Transmission crossmembers that allow for dual exhaust and provisions for the 4L60/65/70E series transmissions you can research, customization of your current, G-Force (last time I checked it wasn't on their site and I had to contact them directly for information), and BRP Hot Rods.

    Make sure the crossmember you choose works with the LS Swap engine brackets/ mounts you use to maintain proper driveline angles. That also leads into the headers and oil pan you plan on using as well.

    Are you looking to go DBW or DBC for throttle control? Gen III or Gen IV? EFI?
    kansasboy
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    Trying to find a crossmember Empty Re: Trying to find a crossmember

    Post  kansasboy Wed May 18, 2016 4:10 am

    Xtreme Thunder wrote:Transmission crossmembers that allow for dual exhaust and provisions for the 4L60/65/70E series transmissions you can research, customization of your current, G-Force (last time I checked it wasn't on their site and I had to contact them directly for information), and BRP Hot Rods.

    Make sure the crossmember you choose works with the LS Swap engine brackets/ mounts you use to maintain proper driveline angles. That also leads into the headers and oil pan you plan on using as well.

    Are you looking to go DBW or DBC for throttle control? Gen III or Gen IV? EFI?

    I haven't decided which computer to go with yet, bruh

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    Trying to find a crossmember Empty Re: Trying to find a crossmember

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