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shifting

  1. Transmission, Adapter, Transfercase Discussion
    I am finishing up my swap, 4BD1T to a TH 400/NP 205, and I need help with the vacuum modulator. Allegedly, a TH 400 that was connected to the 6.2L diesel motor from the factory & the CUCVs had some sort of vacuum source that modulated the amount of vacuum needed to shift normally. This set up...
  2. Transmission, Adapter, Transfercase Discussion
    Just got my F150 project running last thursday the 8th. I'm running a '93 4L80e with an Optishift controller. Now when at light to mid throttle, the shifting between all the gears is nice and easy almost not even noticeable...but at full throttle, the 1-2 shift delays a bit then kicks like a...
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