Noob pinion angle question with pic
My wife has a 2015 Jeep 4dr and we've put a 4 in lift and 35s on it. The kit is the Rough Country 4in x series and it has upper and lower adjustable control arms at each corner. The control arm lengths were set to spec but it looks to me like the rear pinion is pointing too high. I've read a little about axle wrap on acceleration that might move the pinion down but I'm clueless. Do I need to adjust this?
No need to accept that angle when you have adjustable control arms. What's it look like sitting on the tires?
Since you mentioned axle wrap... That would tend to raise the pinion, and be more of a factor on leaf springs.
Since you mentioned axle wrap... That would tend to raise the pinion, and be more of a factor on leaf springs.
Last edited by ronjenx; Mar 28, 2017 at 10:31 AM.
That picture is a little misleading as it's jacked up. As Ronjenx asked, what does it look like when it's sitting under load? That rear DS and pinion should be fairly close to a straight line in the rear.
Thanks everyone for the input. The Jeep is jacked up in the picture but it is supported by jackstands under the axle tubes so it represents pretty much how it sits on the ground. I'm going to pick up an angle finder and see if I can't dial it in better
Since you have a factory Driveshaft that pinion is too high and you might even have vibrations at high speed. For a factory shaft the pinion angles are forgiving but should still be somewhere between pointing level with the ground and pointing straight at the transfer case, yours is pointing above the transfer case. Aftermarket double cardan shafts need to point directly at the transfer case...
Last edited by Biginboca; Mar 28, 2017 at 06:00 PM.








