Ive been looking for a 94-98 12v cummins for my DD/tow rig as my last truck was totaled. So i go to some used dealerships and come along a 99 2500 24valve cummins. ext. cab 4 door, manual, 2wd, 237xxx miles, 1 owner, drove great. What do i need to look for, this truck is in my price range and looks to be a great truck. Any problems with the engine? What transmission is behind it? 5 speed manual what? NV4500? Please help me out.