Do I need to run all 8 arms for adjusting caster etc when installing my Tom Woods 1310 DS? I am looking at MC or Currie.....but as we all know....all 8 is some bucks. Thanks in advance.

 

Depends on what your castor is. Just front lowers and rear uppers should be able to get Ya set right on 3.5" lift and lower

 

One set will let you 'tilt' the axle to adjust the caster/pinion. The second set allows you to move the axle forward/backward in the wheel well (regain wheelbase, center the bumpstops, etc), set the cross caster (squaring the axle to the frame), and gives more fine tuning for caster/pinion.

Upper and lower arms do the same thing, they are just lengthened/shortened backwards of each other to tilt the housing different directions. (front uppers will be shortened to raise caster and lower the pinion, front lowers will be lengthened to raise caster and lower the pinion). At taller lift heights, lengthening is usually the better option, since some arms may not go short enough to get the caster where you want it.

 

Ok, great info here. Thanks guys. So I assume that I could run front lowers and rear uppers with my 3.5" lift and my 1310 front DS. I am leaving rear DS stock. ???????

 

Yes, front lowers and rear uppers will be fine. Add the other two sets later if you want.

You have been to Tom Woods website? There is a bunch of good info in both the JK and Tech Info areas. One thing you will find is a few pics of the angles you generally want for stock vs aftermarket driveshafts. Stock shafts, the pinion is roughly parallel to the tcase output. Aftermarket, the pinion is pointed up at the tcase output. If you are staying with a stock rear driveshaft, you may not need the rear arms. (on my 4door, I ran a 4" lift with stock rear arms and stock rear driveshaft for almost 5 years. I have since added a full set of MC arms, but still running the stock rear driveshaft with no issues.)