Front DS angle and caster correction
04-06-2012 | 07:09 AM
#1
Thread Starter
JK Freak
Joined: Oct 2011
Posts: 527
Likes: 0
From: Triad, NC
Front DS angle and caster correction
Hey guys,
Is it possible to correct both the front DS angle at the TC and front end caster using both front adjustable UCA's and LCA's?
I'm running an OME HD lift with a 1" coil spacer up front to compensate for bumper/ winch sag.
Is it possible to correct both the front DS angle at the TC and front end caster using both front adjustable UCA's and LCA's?
I'm running an OME HD lift with a 1" coil spacer up front to compensate for bumper/ winch sag.
04-06-2012 | 09:30 AM
#2
JK Freak
Joined: Jan 2009
Posts: 722
Likes: 0
From: Carlsbad, CA
You can move the axle forward with the adjustable control arms but caster and front drive shaft angle are inversely related. As you increase the caster you put the front drive shaft at a steeper angle in relation to the pinion. The best solution is to compromise and only increase your caster to the lowest setting where the handling is acceptable. This is usually around 5 degrees +/- depending on the lift and your drive shaft angle won't be too steep.
Last edited by river2c; 04-06-2012 at 09:34 AM.
04-06-2012 | 05:23 PM
#4
JK Super Freak
Joined: Oct 2010
Posts: 1,240
Likes: 0
From: rochester,mn
I went with front lowers and rear uppers
If you are thinking of pushing your rear axle back then get rear lowers at same time
I know Tera Flex ask you if you are thinking of pushing axle back because that means you need a longer arms in rear
Might be something to think about, it's not needed unless recentering
If you are thinking of pushing your rear axle back then get rear lowers at same time
I know Tera Flex ask you if you are thinking of pushing axle back because that means you need a longer arms in rear
Might be something to think about, it's not needed unless recentering
04-06-2012 | 05:52 PM
#6
JK Super Freak
Joined: Oct 2010
Posts: 1,240
Likes: 0
From: rochester,mn
Originally Posted by vulcan classic
I'm right at 95" wheel base now, stock was 95.4, so is this enough to be concerned about or can I get away with just rear UCA's for pinion and front LCA's for caster?
04-06-2012 | 05:56 PM
#7
JK Enthusiast
Joined: Mar 2012
Posts: 336
Likes: 0
From: Leo, IN
I installed the Rock Krawler 2.5 stock mod lift on my JK. Went with the progressive rate front springs due to the extra weight up front (winch and bumper). My castor was at 2.65 degrees after the install. The steering was very flightly and on uneven roads it would nearly change lanes. Added front adjustable lowers, dialed the castor just shy of 5 degrees, and now it's a pleasure to drive again. Rear pinion angle is fine on a JKU with a 2.5 lift. I'm not sure how steep the rear drive shaft angle is on a 2 door with a 2.5 lift. As already stated, just go w rear uppers unless you're trying to recenter the axle. Here's a shot of the RK lowers. Love the shape for added clearance.
Last edited by Topkicker1; 04-06-2012 at 05:58 PM.
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04-08-2012 | 05:13 AM
#8
Thread Starter
JK Freak
Joined: Oct 2011
Posts: 527
Likes: 0
From: Triad, NC
I installed the Rock Krawler 2.5 stock mod lift on my JK. Went with the progressive rate front springs due to the extra weight up front (winch and bumper). My castor was at 2.65 degrees after the install. The steering was very flightly and on uneven roads it would nearly change lanes. Added front adjustable lowers, dialed the castor just shy of 5 degrees, and now it's a pleasure to drive again. Rear pinion angle is fine on a JKU with a 2.5 lift. I'm not sure how steep the rear drive shaft angle is on a 2 door with a 2.5 lift. As already stated, just go w rear uppers unless you're trying to recenter the axle. Here's a shot of the RK lowers. Love the shape for added clearance.