4L60E transmission stopped shifting into third on the highway. I had this problem exactly one year ago and swapped it with another used transmission. This time I swapped all solenoids and flushed the fluid. Upon test drive it still wouldn't shift into third and it tripped a 0700 it never tripped before. Took to a transmission shop, they rebuilt it the transmission, I took it home, the very next morning it tripped P0700 code and keeps popping fuse 19 (TCM FUSE). I ran a ground specifically from the TCM tot eh body of the truck and this did not work. It keeps popping the same fuse. Do I need to replace the wiring harness for the valve body or the TCM.
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Monday, July 1st, 2019 AT 12:23 PM