LOWER or UPPER Control Arms??
10-09-2007, 05:39 AM
#1
JK Freak
Thread Starter
LOWER or UPPER Control Arms??
After installing my lift (3" FT Econo), my JK pulls into ruts.
I know I need to replace my control arms to adjust the caster angle.
Which do I replace? Upper or Lower?
I know I need to replace my control arms to adjust the caster angle.
Which do I replace? Upper or Lower?
10-09-2007, 05:44 AM
#2
JK Enthusiast
Join Date: Oct 2006
Posts: 317
Likes: 0
Received 0 Likes
on
0 Posts
Both! you can try just the uppers or the lowers but apparently you are bugged by the flighty steering, If you really want to "dial it in" get both. Talk to Dave at Northridege. I just ordered mine last week. I got the FT arms. they are a bit pricier but they are built for a tank!
10-09-2007, 06:38 AM
#4
uppers push the top away, lowers pull the bottom in. ideally, you should have both. that failing, i would go with uppers.
your castor may not be the problem. wider tires find ruts easier. my TJ was all over the place. after i worked out all my steering issues. i even find them with my Rubi's little pizza cutters.
your castor may not be the problem. wider tires find ruts easier. my TJ was all over the place. after i worked out all my steering issues. i even find them with my Rubi's little pizza cutters.
10-09-2007, 06:51 AM
#5
JK Freak
Thread Starter
My YJ had 13.5 wide Mickey's and were really bad. That is until I installed a shackle reversal kit.
That solved the problem. I guess I will go with uppers.
Thanks!
That solved the problem. I guess I will go with uppers.
Thanks!
10-09-2007, 08:22 AM
#6
JK Freak
Thread Starter
Just ordered the Full Traction Upper Adjustable Control Arms from Quadratec. Also ordered the Superlift steering stabilizer to help as well. I will let you know how this turns out.
Another Question:
Do I make the new arms longer or shorter than stock?
Another Question:
Do I make the new arms longer or shorter than stock?
10-09-2007, 08:28 AM
#7
JK Junkie
Join Date: Feb 2007
Location: Central Georgia
Posts: 2,326
Likes: 0
Received 0 Likes
on
0 Posts
Trending Topics
10-09-2007, 09:14 AM
#8
JK Freak
Thread Starter
So you don't have adjustable arms, correct? I have a 4" Skyjacker lift and I don't have adjustable arms either, and I don't have that problem. It's possible part of it could be related to your tire wheel combo. I've noticed my rides different than it did with my previous wheels. How bad's the pull?
Thanks. That makes sense.
10-09-2007, 09:53 AM
#9
JK Newbie
Join Date: Oct 2007
Location: visalia ca
Posts: 85
Likes: 0
Received 0 Likes
on
0 Posts
Buy the upper control arms to set your caster. The lower ones are a waste of money. Jeep uses cams on the upper control arms to adjust caster. But the adjustable upper control arms do the same thing but much stronger.
10-09-2007, 10:01 AM
#10
JK Enthusiast
Join Date: Dec 2006
Location: Milford, MI
Posts: 321
Likes: 0
Received 0 Likes
on
0 Posts
The way I have always looked at it:
The lowers mainly position the axle fore/aft
The uppers allign the axle
When you lift, the axle moves closer to the control attachment point on the frame (even if it is just a little bit). To get it back to where it should be, you extend the lowers.
The uppers will then be used to twist the axle back to it's normal castor angle.
Some people will tell you one, or the other. To really do it right, you need both, but they need to be the right lenght.
Simply said, if you can get adjustable uppers, that is the way I would go.
The lowers mainly position the axle fore/aft
The uppers allign the axle
When you lift, the axle moves closer to the control attachment point on the frame (even if it is just a little bit). To get it back to where it should be, you extend the lowers.
The uppers will then be used to twist the axle back to it's normal castor angle.
Some people will tell you one, or the other. To really do it right, you need both, but they need to be the right lenght.
Simply said, if you can get adjustable uppers, that is the way I would go.