hey at 77 miles an hour im at 2000 rpms does that mean i have 3.73 gears????

 

Yup

 

Thats about right

 

With out looking at your sig it says you have an auto trans too. If you had the manual trans youd be running about 2450 at 77 mph.

 

oh ok do u think i will have a big lose of mileage if i put 35" procomp xtreme A/T on stock wheels.....anyone have them tires

 

I lost about 2-2.5 mpg hand calculated when I put mine on (see sig). But my hand calc figures were based on my trucks odometer which is off now, do to the larger diameter tires.
Since my odometer is off, then my hand calculated figures are also wrong, I bet I actually lost more like 1-1.5 mpg. I also have a 6spd manual which is geared lower than you auto with 3.73's, and I'm not sure how that will affect things?

 

thanks....yeah i dont want to lose more than 2 mpg... how r the tires u like them???