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4L60E Trans Issue (Won't shift out of First)
#21
Gentlmen, I have a 2000 Yukon XL with the same exact problem. Took it to a tranny shop, Honest Freind, He hooked it up and said Electronics were fine (After I replaced the Solinoids) I had to be a Clutch issue.. So I pulled it and replaced all Metals and Clutches. replaced the Seals on the Servo as well,, I Put back together and it is doing the Same exact thing. Something in the Valve Body that I am missing?
Did you ever figure out what the problem was, I have a 99 yukon and rebuilt the motor and it still has the same issues... Thank you