First time swap started

[skyphix]

Originally Posted by TrybalRage

I had a th350C (lockup) previously, so that must explain why I have the wiring for it.

Very likely, and the proper brake switch. Mine was originally a manual transmission so I've had to add the proper brake switch.

With my 4L80E, the TC locks up, but doesn't unlock appropriately when the brake is pressed so it pushes VERY hard until the truck is basically stopped completely, when the PCM Finally unlocks the TC.