Me and my dad recently in the past 2 years have rebuilt my bronco ground up, everything from engine, trans, transfer case, differentials, bushings, ect. And the other day after we finally put the driveshafts in we backed it out of the garage and dropped it into gear and it does nothing. if you put it into 2nd or 1st it still will not move(its a c6 trans by the way).No slipping or grinding occurs when we put it in drive you can rev it and it does nothing, but reverse works absolutely fine with no slipping or grinding at all.We thought it was the shift linkage and adjusted it and it still didnt fix the problem, the fluid was a little low so we filled it full and still it didnt shift into drive.We then thought maybe one of the control valves in the valve body hade got seized or stuck, so we took the trans pan off dropped the valve body and everything was fine nothing was scored or messed up at alll, and all the check ***** were in the right place and none were missing. So we put it back in filled the transmission up and still no drive or any foreward gears. Any help would be greatly appreciated because im lost.

 

I would get the people that rebuilt the tranny a call. Even though it's been 2 years, see what they say about it.

 

oh we rebuilt it all man, any idea what could be wrong if nothing is grinding? the band clamp being loose maybe?

 

-What about staring in neutral?
-Tried shifting through all the gears with foot on brake? Engine revs change, or can you feel the tranny catch?
-I had to adjust my linkage from underneath to get everything to work correctly after a rebuild tranny, and I had to adjust the kickdown under the hood so it would shift properly.