We replaced the factory coil springs with a set of heavy-load Old Man Emu 21⁄2-inch coils. We want the Jeep truck to as sit low as possible but still fit 37s. The coils make the frame sit taller than we planned, but we don’t have the weight of the cab, fuel, tools, spare tire, driver, passenger, dog, cooler, dog food, camping gear, other cooler, and other stuff on them, so we’re banking they will settle down to our desired 61⁄2 inches of uptravel. Swapping coils is an easy fix if needed, as OME has a variety of weight ratings for heavy or light Jeep TJs. We can also adjust pinion angle by lengthening or shortening the 7075 aluminum links.