Rear control arms
Thread Starter
JK Newbie
Joined: Aug 2011
Posts: 59
Likes: 0
From: Clearfield, PA
Rear control arms
I put on the Metal cloak 2.5" lift and have a slight driveline vibration between 50-60 mph. I want to adjust the rear pinion angle and not sere if I should get the uppers or lowers first?
JK Enthusiast
Joined: Jun 2012
Posts: 348
Likes: 3
From: Boise, Idaho
JK Jedi Master
Joined: Jan 2008
Posts: 11,463
Likes: 165
From: Austin <--> Colorado Springs
Doesn't matter, they do the same thing.
Uppers will be lengthened a bit over stock, tilting the top of the housing back.
Lowers will be shortened a bit under stock, tilting the bottom of the housing forward.
Some people prefer the lowers, since they are beefier than the stock arms and should handle impacts better. Other people prefer the uppers, since shortening the lowers will give a slight decrease in wheelbase.
But generally, front lowers and rear uppers are considered to be the ones to go with first...
Uppers will be lengthened a bit over stock, tilting the top of the housing back.
Lowers will be shortened a bit under stock, tilting the bottom of the housing forward.
Some people prefer the lowers, since they are beefier than the stock arms and should handle impacts better. Other people prefer the uppers, since shortening the lowers will give a slight decrease in wheelbase.
But generally, front lowers and rear uppers are considered to be the ones to go with first...
Last edited by nthinuf; Jun 5, 2014 at 02:45 PM.