2003 CCSB here.
My rear is dropped with a "3 inch drop shackle" (it was actually more like 2-1/4") and I have the overload removed, which was just under 1". So it's an actual solid 3" lower in the rear. I did the math, and that would have resulted in a slightly more than 4 degree change in pinion angle, so I put 4 degree shims in. No clue if this is necessary, but it has zero vibration or noises of any sort for 30k miles now. I also swapped the worn out cheapo Monroe shocks (rear only) for some KYBs that were, I think, about 3 inches shorter, so that I could actually use the entire compression travel.
Then I dropped the front by de-cranking the torsion bars until the front was about 1/2" lower than the rear as measured by the fenderwells. I forget exactly how much of a drop that was, but I think it was around 2" from what I assume was stock.
With this setup, the truck drives extremely well, it rides extremely well (significantly better than stock), I still clear a 305/50R20 in the front with only a tiny bit of the front valence trimmed, and the CV angles are level or maybe just slightly negative. It launches in 4WD about as smooth as any truck I've ever been in.
Everything else is 100% factory.
I did add some custom outside-the-frame airbags since I do some towing and/or hauling with a good bit of weight in the bed, and I don't like the headlights pointing way up with a load. With the 3 inches of drop in the rear, the standard under-the-frame bag kits won't fit at all, and if you make one fit with single-bellow bags instead of the double-bellows, it will ride absolutely horrid. Been there, done that, don't recommend.
I'm gonna try and get some pictures this weekend actually.
My rear is dropped with a "3 inch drop shackle" (it was actually more like 2-1/4") and I have the overload removed, which was just under 1". So it's an actual solid 3" lower in the rear. I did the math, and that would have resulted in a slightly more than 4 degree change in pinion angle, so I put 4 degree shims in. No clue if this is necessary, but it has zero vibration or noises of any sort for 30k miles now. I also swapped the worn out cheapo Monroe shocks (rear only) for some KYBs that were, I think, about 3 inches shorter, so that I could actually use the entire compression travel.
Then I dropped the front by de-cranking the torsion bars until the front was about 1/2" lower than the rear as measured by the fenderwells. I forget exactly how much of a drop that was, but I think it was around 2" from what I assume was stock.
With this setup, the truck drives extremely well, it rides extremely well (significantly better than stock), I still clear a 305/50R20 in the front with only a tiny bit of the front valence trimmed, and the CV angles are level or maybe just slightly negative. It launches in 4WD about as smooth as any truck I've ever been in.
Everything else is 100% factory.
I did add some custom outside-the-frame airbags since I do some towing and/or hauling with a good bit of weight in the bed, and I don't like the headlights pointing way up with a load. With the 3 inches of drop in the rear, the standard under-the-frame bag kits won't fit at all, and if you make one fit with single-bellow bags instead of the double-bellows, it will ride absolutely horrid. Been there, done that, don't recommend.
I'm gonna try and get some pictures this weekend actually.
