I got a new/used tranny from a member here awhile back. It has taken me (due to my accident and injuries) a really long time to get it in and the truck running again. I started driving it this week and it is shifting at some seriously low points. Shifts into 2nd at like 8-10mph, shifts into top gear at such a low RPM that the engine stumbles and almost dies. I know that the tranny had been behind a diesel before I got it. I swapped out the torque converter for a new B&M towing coverter, and I installed the shift governor thingy on the back left side of the tranny, using the one out of my last tranny. However the engine doesn't seem to be spining at excessive RPMs when driving, it's just shifting at odd RPMs As far as I had been told that would fix it, but it still shifts really low. 1. Is this going to be a problem? (I should never hit top gear off-road) 2. Any ideas on how I can fix this? I do plan on getting a cheap Tach here soon to keep an eye on what the heck is going on, and if I can figure out the wiring I'll get my tranny temp gauge installed too.