4bt ***mins swap

Discussion in 'Classic GM' started by dhchip10, Jan 31, 2011.

  1. dhchip10

    dhchip10 New Member

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    4bt cummins swap

    Hey guys I was wondering if anyone has done or considered doing a 4bt cummins swap. I have read on a bunch of pople who have done this in my era of truck and it seems pretty easy. If you have what tranny would you recomend?
     
  2. GCncsuHD

    GCncsuHD ΜΟΛΩΝ ΛΑΒΕ

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    Re: 4bt cummins swap

    I've looked into it, the bread truck 4bts usually come bolted to a TH400, a common swap is to put a 700r4 behind it for the OD.
     
  3. Jared

    Jared Banned From GMFS

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    Re: 4bt cummins swap

    IIRC there was a member here who was bagged with a 4 or 6bt.
     
  4. Joakwin

    Joakwin layin big rubber

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    Re: 4bt cummins swap

    my dad did one,84 1/2 ton single cab, turbo/innercooled 4bt and he used a ford 5speed manual box at 1st with a d60 rearend, and then later on swapped in a turbo 400 with a gear vender overdrive
     
  5. Ziegelsteinfaust

    Ziegelsteinfaust GMFS Member

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    Re: 4bt cummins swap

    4bt swaps.com

    It looks neat, and a great idea. Just diesel scares me for some reason.

    I know its stupid.
     
  6. 4BT

    4BT Banned From GMFS

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    Re: 4bt cummins swap

    4btswaps.com and search around the buildup threads for some 73-87 and 88-98 swaps. Pretty straightforward swap since most breadtrucks ran GM accessories and a TH400 based transmission (TH475)
     
  7. nekkidhillbilly

    nekkidhillbilly professional smartass

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    Re: 4bt cummins swap

    big boogie diesel man
     
  8. GMC85Diesel

    GMC85Diesel Diesel Chick

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    Re: 4bt cummins swap

    the diesels don't scare me I actually prefer them. I've considered dropping a 4bt into my 85 1/2 ton, and most likely will if/when my 6.2 gives out. my dad does a lot with the 5.9 (6bt) engines. I would personally stick with a NV4500 trans, but make sure you get one with a new drive shaft in it because of the 5th gear problem, fix that and it's a perfect 5 speed manual!
     

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