I have a 2003 Cummins with about 150,000 miles on it and it now has a delayed shift to second gear. It seems as i accelerate in first to about 2,000rpm it doesnt shift like normal. Normally i would expect it to shift before 2,000rpm but now it might shift over 2500rpm! If i keep adding throttle lightly it still doesn't but occasionally when i let off the throttle it will shift into second and then into third with no problem. This all came on at one time. I have had no other tranny issues up to this point. Need advice!

 

replace the governor pressure solinoid and sensor. that shld fix it