On line research shows that a 4.30 is the rear for a 4x4 with tow and with the 6 speed trans, with double overdrive, the mileage will be ok you don't get too heavy on throttle.
I will be towing a 26ft travel trailer some, so it should serve well.

Thanks for the response and info.

Last edited by TBREW401; 03/25/14.