I just refreshed a customer's trans and now there is no reverse. Goes forward in the shop but haven't drove it. Doesn't throw any codes at all. That is what has me stumped. I put it in reverse and it says " shift range inhibited" is there a way to make it go hydraulic reverse or third like the 5 speeds?
LBZ: No reverse after rebuild
- Thread starter gmac32
- Start date
No codes at all when you put it in reverse and get shift range inhibited? A LONG time ago, I had something similar happen where when I put it in reverse that would happen but there was a code (don't recall what it was). Problem was an o ring for one of the pressure switches in the psm was out of place and leaking pressure.
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Zero codes. I hear ya Mike. I can usually get stuff figured out pretty well but this one has me stumped
opcorn:I kinda figured this much. I just have to get this done because i am behind on other customers vehicles
I’m no genius but I’d guess valve body since there is no codes. Check your springs and make sure all the valves move freely.
Make sure your speed sensors are hooked up as well
But start the truck. Pull the main harness on back of trans. If it doesn’t have third and reverse like that then something internally is wrong somewhere
Make sure your speed sensors are hooked up as well
But start the truck. Pull the main harness on back of trans. If it doesn’t have third and reverse like that then something internally is wrong somewhere
It's a 6 speed, no NSBU. Battery voltage would inhibit forward gears as well; so would low fluid.
I tried another tcm and no change. Took the valve body out and everything stroked freely. Speed sensors are working right. It will power brake and spin the tires so i know i have enough pressure for reverse. I have done all these things and this is why i am confused.
Crank the truck then pull main harness on back of trans, put it in reverse. Does it have it then?