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Thread: Going from TH350 to 700R4 transmission.

  1. #1

    Default Going from TH350 to 700R4 transmission.

    I'm considering replacing my TH350 with a 700R4 transmission on my '77 Trans Am that has a Pontiac 400 engine. Is there anything special I need to purchase to get it to work with the Atomic EFI? I had heard I may need a new TV cable or bracket. Thanks, Darryl

  2. #2
    Join Date
    Jan 2010
    Brisbane, Australia


    Hi Darryl. You probably need all of this: Gary
    Regards, Gary

  3. #3
    msdtech1955 Guest


    Bowler transmission or TCI transmission?

  4. #4


    When looking for a donor, look for one that has a valve body ready to accept TransGo's 700-LU kit. It simplifies torque converter operation, no electrical connections will be required as it will function hydraulically. I think '87-'89 full sized, like Caprice or Camaro with V8. A transmission around that year should have many of the improvements built-in too, saving a little on the rebuild cost. Then you'll need a proper cable bracket along with the TV cable. And be certain to understand the requirements of the TV cable. Check your throttle body manufacturer to be sure it's compatible. The amount it pulls through the proper arc is very important with them.

  5. #5
    msdtech1955 Guest

  6. #6
    msdtech1955 Guest

  7. #7


    Thanks for the replies.

  8. #8
    Join Date
    Oct 2018
    Sonoma ca


    What ever happened with this? I need brackets! The Holley one won't fit the Atomic EFI! Summit will let me return it.

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