Thanks all. What I need to do is drop the pinion nose about 3 - 4 degrees. Right now there's 9 degrees on the driveshaft and 14 degrees on the pinion and I'm geting some driveline rumble under certain situations. This rig likes the pinion about 2 degrees low. The installer has the uppers run all the way in, and ran the lowers out about 1/2" longer than TF's specs, which is causing some binding, slight spring bow and the bump stops aren't aligning as I'd like em. But, biggest issue is the pinion angle.
I want to shorten the lowers back to TF spec, then adj pinion angle with the uppers, but I'm guessing the upper arms will have to be shortened about 1/4" - 1/2" to pull it off. The easiest deal would be if TF has shorter rear uppers available that I can swap out, but if necessary I could just have 'em shortened. (BTW, thanks Steve, I may take you up on the offer!) I can see that the installer started to shorten one of the uppers with a cut off wheel but stopped and just lengthened the lowers as much as he dared. Issues with shortening the arms I can see right off the bat are getting the cut off square, and worse, hosing the threads so the joint won't go back in. Also figuring the joint shank may have to be shortened. One could "F" this up pretty easily.
Interesting that I had the same issue on this JK with the TF short arm kit I originally installed. I corrected it by doing as this installer did, extending the rears a bit, but it only took about 1/4" lower arm extension. He's got the rear brackets welded in the right places. Beautiful welding job, too.
'09 JKRU. 4" Teraflex long arm, Teraflex R44 housing, Teraflex / Fox Resis, Poly Performance skids, Nemesis Billy Rockers, Nemesis flares, 37" ATZ P3s on 17" 5x5.5" Trailready HDs, Spyntec hubs, Teraflex BBK, Mopar BBK master/booster, Superior front & Alloy USA rear axle shafts, CTMs, Reids, Synergy drag link & tie rod, WTOR hydro-boosted steering, 5.38s, TF Dual Rate front bar, TF bumpers, Warn Powerplant, Tom Woods shafts, AA xfer case cable, Kilby canister relo, RH4x4 cage.
Last edited by SoK66; 03-10-2013 at 01:09 PM.