Please tell us what year your big bolt is. The term “big bolt” is used here mainly for the 1.5 ton but also for the rare 2 tons. The 1.5 tons have the Eaton H110 rear axle and ten pugs on the rear 5 in the front. Nearly all of the 1.5 tons came with 6.17 gears, the only other option was a 5.43 ratio. I happened to find a set of 5.43s after searching eBay for months. There are some excellent gear ratio calculators on the site
www.4lo.com I highly recommend.
