Hey Guys,

I've got a customer that has a 96 Chevy 1500 5.0v8. He took the 4L60 out and put in a 4L80 from a 97 3/4 ton Chevy with a 454ci motor. He needs help with getting the transmission to shift normally. Currently his transmission will shift into reverse and drive but is stuck in 2nd or 3rd gear. Any help would be greatly appreciated.


I was looking into this and called a bunch of people and even talked to my tranny specialist here at my shop. He said that he will have to run 2 ecms. one from the 96 to make the motor run and one from the 97 to get the tranny to shift. Is this what my customer is going to have to do?