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Transmission Swap

Discussion in 'GM Powertrain' started by DetailEvan, Sep 26, 2010.

  1. DetailEvan

    DetailEvan New Member

    I did a search on the site to see if this was a thread before but i didn't find anything. I wanted to know if it was possible to swap a new silverado's 6 speed auto into my 05 5.3L 2wd silverado.
  2. silveradotrailblazer

    silveradotrailblazer New Member ROTM Winner 1000 Posts

    Never heard of the swap, sounds like a good one. I would think at the least you have to replace/modify the trucks ecm.
  3. DetailEvan

    DetailEvan New Member

    Thats what i was thinking. Maybe give me the ability to stick a lower rear gear in it but keep highway mileage the same.
  4. ippielb

    ippielb Active Member ROTM Winner 1000 Posts

    Are both trucks 2wd? You will need to modify the transmission braces though, they changed with the new body style i believe. You will need to change the your ecm. And i also believe there is a difference in length of the transmissions so a new drive shaft might be in store. I don't know the physical size of the new transmissions compared to your body style, but the exhaust might be in the way when it goes under the transmission.

    Take a look under a truck like you wana swap. Who knows! Good luck!

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