I will say this- with a 3.73 rear end and 215/75/15 tires (27.7 diameter), with my T5 I am in 5th gear at 40 mph. I chose the wrong rear end gearing. Unless I go back to the tall trailer tires that were in the truck when I bought it.
~ Dave 1950 Chevrolet 3600 3/4-ton with 261 engine & T5 Transmission
