But if you want to maintain the 373 gear you use the true track and the Jeep JL ring and pinion up the true track is $760 and you can get a Spicer ring and pinion for 299 and if you're capable of installing it you'll save a lot of money
The eaton true track is made for the Ford Bronco and the Jeep JL with the m220 the Jeep JL ring and pinion in 373 ratio will work in the Bronco axle you'll have to find someone to set it up for you but this is what I plan on doing because it's there all the time giving you additional traction as...
you could get a eaton true track and a 373 gear for a Jeep JL and have somebody install it you need no wiring
I have a base Bronco automatic for the 373 gear and that's what I plan on doing