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  1. Cummins 6BT / 5.9 Conversions
    Hi all Looking at keeping my freshly rebuilt 4L80 in my 93 dually for my 6BT swap, the truck was a 6.5 originally and was the last year for a mechanical pump i believe? What inputs do I need to keep to give the computer so my trans still shifts? I've read some places it just needs RPM, throttle...
  2. Transmission, Adapter, Transfercase Discussion
    Hello all, I've got a few questions that I hope someone can help me out with. A few months back, I acquired a 4bt engine (the whole van actually). I'm swapping this into my 85 F-150. The engine came with a th400 2wd trans. What I'm wanting to use is a 4L80e (to retain the overdrive like I...
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