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thetinman857
10-15-2010, 07:30 PM
Got this chart off of GL4x4.
Kinda lost here, I have a 3 in. lift on my '01 XJ, do you want longer "upper" or longer "lower" control arms?
My RC kit did not come with any control arms. Bad case of "hit the bump and wobble".

Control Arm Length Application Chart

Lift...........Lower Control Arms/Upper Control Arms
********Decimal**Fraction**Decimal**Fraction
Stock........15.75.......15 ¾........15.00.......15
2”.............15.92.......16............14.88.. .. ...15
3”.............16.09.......16............14.92.. .. ...15
4”.............16.33.......16 3/8......15.03.......15
4.5”..........16.47.......16 ½........15.11.......15
5”.............16.62.......16 5/8......15.21.......15 ¼
6”.............16.97.......17............15.44.. .. ...15 ½
7”.............17.36.......17 3/8......15.74.......15 ¾
8”.............17.81.......17 ¾........16.09.......16
9”.............18.30.......18 ¼........16.50.......16 ½
10”...........18.82.......18 ¾........16.96.......17
rguignard
10-16-2010, 08:07 AM
Got this chart off of GL4x4.
Kinda lost here, I have a 3 in. lift on my '01 XJ, do you want longer "upper" or longer "lower" control arms?
My RC kit did not come with any control arms. Bad case of "hit the bump and wobble".

Control Arm Length Application Chart

Lift...........Lower Control Arms/Upper Control Arms
********Decimal**Fraction**Decimal**Fraction
Stock........15.75.......15 ¾........15.00.......15
2”.............15.92.......16............14.88.. .. ...15
3”.............16.09.......16............14.92.. .. ...15
4”.............16.33.......16 3/8......15.03.......15
4.5”..........16.47.......16 ½........15.11.......15
5”.............16.62.......16 5/8......15.21.......15 ¼
6”.............16.97.......17............15.44.. .. ...15 ½
7”.............17.36.......17 3/8......15.74.......15 ¾
8”.............17.81.......17 ¾........16.09.......16
9”.............18.30.......18 ¼........16.50.......16 ½
10”...........18.82.......18 ¾........16.96.......17

all you need is 16in lower arms your upers will be good :thumbsup:
bluedragon436
10-17-2010, 11:02 AM
I will def. have to measure my LCA's that came with my lift, as I am not real sure they are any longer than my stock ones... guess I will measure to make sure... if nothing else they will be better than stock, and will hold me over until I can make my next advancement in lift height...
GT MOTORSPORTS
10-21-2010, 02:44 PM
Nice post! It shoud be of good use to alot of garage built XJ's
thetinman857
10-24-2010, 01:45 PM
all you need is 16in lower arms your upers will be good :thumbsup:

Yes, a pair of RC adjustable lower control arms, at 16 inches, is just what I needed.:thumbsup:
jccatt
05-09-2012, 05:53 AM
What if you keep the stock lower arms. How do you calc the length of the upper arm then?

I have 3" lift and just got some adjustable uppers.
4.3LXJ
05-09-2012, 09:47 AM
What if you keep the stock lower arms. How do you calc the length of the upper arm then?

I have 3" lift and just got some adjustable uppers.

Minus .34" or use an angle finder or smart phone to set the castor at 6°
cantab27
05-09-2012, 02:39 PM
how do i measure this one....

http://i469.photobucket.com/albums/rr52/cantab27/westport%202012/SAM_1899.jpg

:rolleye0012:
4.3LXJ
05-09-2012, 02:40 PM
how do i measure this one....

http://i469.photobucket.com/albums/rr52/cantab27/westport%202012/SAM_1899.jpg

:rolleye0012:

With a curved straight edge :out:
jccatt
05-09-2012, 03:23 PM
Thanks 4.3LXJ. I'm not sure if the adjustable go's less than stock. They are IronMan Andy arms.