Rig: 93 HDJ81, 37" tires, Gturbo green wheel, pdi intercooler, Manta 3" exhaust, WAT extreme valve body, 3.11 low gears and 10% underdrive in xfer case. Rig is used offroad but 3 to 7 hr highway drives (usually in mountains) are not uncommon to reach fun destinations.
Question: What diff gear...