Why is my transmission shifting early
I have a 1994 Chevy C1500 4.3 4l60e. I recently replaced engine with a 4.3
out of a 4x4 blazer 1995. Now my transmission shifts early and at low speed
jumps in and out of OD. I have replaced computer and put all elect.
components off my original engine on the 95 engine. Any suggestions?