The whole point of gearing properly is to keep the engine in its powerband. With the NSG370 and 35" tires, 4.88 will do that. Yes, you'll be running slightly higher RPM's at any given speed but those tires are tall/heavy and your motor isn't powerful....the lower gears are giving your motor the required leverage it needs to turn those tires without issue. The 3.8 needs to be in the 2.5-3k range to run efficiently, given the extra rotational mass and non-aerodynamic nature of the jeep. Go 4.88. The nice byproducts will be a slower crawl speed, better engine braking when going downhill, and optimized fuel mileage.
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