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Freshly Rebuilt 4R100 shift problem...
Hey all, just got my transmission (4R100) completely rebuilt professionally along with a new TC, by a friend of ours who works at a transmission repair shop. I put the transmission back in last night, filled it full of fluid while it was running, as well as threw in a quart of lucas... I have all my gears P,R,N,D,2,1... but for some reason when the truck is in drive it will not shift out of 2nd.. into 3rd that is... gets to about 2,200 - 2,300 range at about 35 mph and will not shift. Now, if I really get on it, it will act like its going to shift to 3rd but just put itself back into 2nd... I really don't think he messed up rebuilding the transmission considering we've taken about 4 to him and never had a problem but I suppose anythings possible... We're thinking it might be a sensor of some sort? Still waiting to hear back from him, but in the mean time I'd see if anyone on here had some ideas...
Thanks a lot!
Last edited by MDrumm03; 06-17-2013 at 05:46 AM.