boy i cant believe all the nervous nellies here talking crap about automatics------makes you wonder how stupid the guys are that are racing with automatics in all classes of truck racing---strip--off road--pulling contests-----a friend, butch brooks, builds performance automatics and has about 30 teams that run his trannys-----a few years ago in the world championship rock crawling event in moab utah his trannys placed 1-2-3-5 with 4th place going to a nv4500-----the only real advantage of the manual is holding the unit back going down a colorado mountain pass----yep i do have an nv4500 in my cummins truck and a getrag in my 71 govt truck but still not scared of an automatic in a truck application.....