Well in my defense I did haul heavy, usually a 44' or 53' enclosed going from coast to coast and quite a few of the problems were in the mountains on I-40 or around Arizona.
I always wondered to myself what the rear end gearing was in the trucks that had trans problems you drove?
Because not enough gear is going to stress the trans more than if it had a deeper gear.
The 99 dually had 3.55's with the NV4500, the 04 single wheel had 4.10's with the 48RE, the 05 dually had 3.55's with the 48RE, the 07 dually had 4.10's with the G56.
3:55s are no good for the hills or mountains IMO. 4:11s are good.
My 99 chevy was ordered with 4:56s. The salesman told me it was to be gas hog, it was!! Luckily I live 1.5 miles from work and some days only drove to and from work.
But it would pull with those gears, I pulled a 49' for while. 49' trailer was too much for my 99 454 dually with 4:56 gears.
That is why I got the toterhome.
