So i have a 2012 JK 2 door w/ 3" lift and 35s. I put the front lower TF control arms to correct castor on and they turned out great. Everyone recommended rear uppers as well so I bought them and set them to the specified length which is as short as they go but when i went to install them and lined it up the axle had rotated so much to correct the pinion angle that the coil springs could almost fall out. I am running a stock drive shaft and the pinion angle really doesnt look bad. Do I even need the rear uppers?

 

Any help guys? If I don't need them I would like to sell them.

 

1st.....On the Teraflex rear uppers they make 2 different rear uppers, 4 arm set up and 8 arm set up.
Hope you got the correct part numbers. 8 arm are 1" longer = not good in your set up. Check out their site to verify.
2nd..... A few companies make angled wedges for the rear axle.....RK, Senergy, and so on. One makes a plate set up.


Check this link out, hope it helps.


https://www.jk-forum.com/forums/modi...3/#post3392059

 

Thanks appreciate it. I bought them from a buddy of mine.

 

Is your pinion pointed at your transfer case, or is it pointed downward? U would want to lengthen rear upper arms to correct a pinion angle issue. The rk wedges will help with the spring bow u will get.

 

Here's some pics i snapped of the rear coming off the trans to the differential





And here's the front meeting the differential

 

Pics lines up weird. There's only one of the front.

 

The rear doesn't look to bad at all. Did u measure the angles with an angle finder? U want to measure the angle on the bottom of the diff by the pinion, and on the shaft. U want the diff a few degrees down from the shaft angle.. Ie if the shaft is 30 degrees, make the diff at around 27 degrees.
The front will look like that, otherwise u will have a really low caster setting and the jeep will wander alot when u drive.
Only way to lessen the angles is get aftermarket double Cardon driveshafts which are longer and will lessen the operating angle on the joints.