I thought there weren't gearsets available for that axle?
The J8 rear axle is a c-clip Low Pinion Dana 60, so you there are plenty of gear ratios available. We run 5.38s.
And where can these be found?? I have a 14 bolt already sitting in my shop but with me the only thing I don't have enough of is time.
They are pretty hard to find, we stumbled on a set. A friend installed Dyantrac 60s front and rear on his Jeep, so he sold us the J8 Front Dana 44 and Rear Dana 60 for our Dixie build. He purchased the J8 axles new from Dynatrac I believe. Mopar Accessories also sells them.
Why would you go with another c clip axle?
The Dana 60 c-clips are not ideal, but they are still 35 spline. You will have to snap an axle shaft to have an issue. With all the power and abuse we have put to these axles we are yet to have a problem.
When we installed the J8 axles the normal upgrades to the front axle were performed, sleeved (sleeves have to be machined down as the J8 44 has thicker axle tubes) and gusseted. We also added an ARB front locker, 5.38 R&P and 35 spline RCV shafts. The rear J8 required a bit more work, the factory leaf spring brackets were removed and a Teraflex JK bracket kit was welded into place. It also runs an ARB and 5.38 gears.
My favorite part about the J8 axles are the brakes. Fronts are 13.25" with dual piston calipers and the rears are 13.85", single piston caliper and integral parking brake. Basically the J8 axles run Ram 1500 brakes. With 40" tires, and 500 hp larger brakes are a necessity.
J8 axles have a 5x5.5" bolt pattern.
I have been really happy with this set up, but if I had to do it again I would install a Prorock 44 front with the same internals and use a Trail series 60 with the Prorock up grade. In the end I would spend the same amount of money, but the install would not take as much time.
Hope this helps