Hello, My stepson has 92 c1500 pickup with 4L60 trans that had lost 3rd and 4th. He bought junk yard trans from 93 Cadilac Fleetwood and had a guy swap them. The dust cover was the minor issue but speed sensor maybe the big issue. Truck shifted and ran great for 1st 20 or so miles but without speedometer. We figured sensor may be bad and was going to swap it with old trans. Found that the old pickup trans has sensor that looks like an induction pickup sensor, while that Cadi trans has a shaft that spins driven of the tailshaft. Now he is get Check Engine light which I understand that the speed sensor connect to computer and no info being sent to it. Im looking at replacing sensor with a new one. Is there more to this? Will either sensor work with this truck?