i have a 2000 cummins 4x4 and i put a fully built bd transmission in it i've had the tranny for about 4 months and today it all the sudden wont come out of first gear but whats weird is the second time i went to drive it it shifted fine but then i let it sit a second then tried it again and then were back to it staying in 1st gear again im new to all this stuff any help would be great.

 

hi
i would contact B D first thing monday morning they should help you before you do some real damage !