At 70mph I'm turning around 2100+rpm with 4.10 gears and 34.5" tires. Ive get a 6 speed though. With stock tires I was around 2500rpm's. Waaay to high. Is your torque converter locking up once you are in high gear? If it's not then that could explain the higher rpm.

Auto trans?? Is it set to take advantage of overdrive or is OD off??

At 70, mine gets about 2,000 rpm with the OD engaged and running 4.10s.

265/75/r20's and i run about 2k at 70.

@ 70mph I am turning right at 2000rpm with 265/70/R17's. :pca1:

265/70R17's, 3.73 gears and auto and I run 2k at 70

Correction, those were my old tires.... DUH

Tires that are on the truck now are 275/60/R20

i have 24 valve auto it runs at 2100rpm at 70

I brought it back to the dealership and they replaced the valve body an it running 2100-2200 @ 70 its a little better

skyjacked84,
sounds like your rebuilt is working properly. i pulled a camper this past weekend and mine was running around the same rpms. i would worry if the tranny is shifting hard or have noises coming from it.