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2002 4R100 transmission swap

Discussion in 'Transmission & Drive train' started by Mr_Neutron, Jun 7, 2020.

  1. Mr_Neutron

    Mr_Neutron Member

    Likes Received:
    May 30, 2019
    Sunny San Diego, CA
    Greetings...my 2002 Expedition has 256K miles on it and the motor has regrettably developed a rod knock and I'll be swapping the motor out. I also have another 4R100 transmission with about 80K miles on it that I'd like to put in at the same time. Aside from replacing the torque convertor what else should I do to the transmission while I have it out? I tow a travel trailer so I'm considering a Transgo Tugger kit. Aside from that what about seals? The transmission pump? Superior and Sonnex both have various fix-it kits for the 4R100. Are they useful? Anybody have experience with something like this?

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