Car won't run past 60mph

Do you put it in neutral before backing out to load the converter?? Does it rev everytime you put it in reverse, or just when its cold?? I always warm the trans in neutral before I set out, even in my daily 03 Ram! Not going to solve your high speed limit, but may be a false reading on the reverse issue! My truck revs way up in reverse if I don't load up the converter first, and it has a 3:91 rear!!! Just throwing out ideas!!!