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I have been compiling this info for a while, finally got around to posting it. I could not find a thread on here that outlined the actual differences in the automatic transmissions of our trucks. Feel free to comment or ask questions if you need anything. I BELIEVE all this is correct, but feel...
Will it work properly? Maybe. Someone more knowledgeable than me will have to chime in.
There could be wire-harness differences, there could be torque converter differences. Somewhere along the line the torque converter clutch went to a different clutch material designed to allow some slippage. Earlier converter clutches were on/off. Later converter clutches were "modulated" from zero to almost 100% engagement. I don't remember when the change happened.