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Topic: Control Arm Lengths

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GLXJ PRESIDENT
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Date:
Control Arm Lengths

As it seems that this has come up a lot in the past few weeks, I figured I'd make a post on it for future reference.

This is a list of the desired control arm lengths for the lift height you have. Measurments are taken from hole to hole on the control arm. This is the same for both XJ and MJ over all years.

LCA = Lower Control Arm
UCA = Upper Control Arm

Stock
LCA - 15¾"
UCA - 15"

2"
LCA - 16"
UCA - 15"

3"
LCA - 16"
UCA - 15"

4"
LCA - 16 3/8"
UCA - 15"

5"
LCA - 16 5/8"
UCA - 15¼"

6"
LCA - 17"
UCA - 15½"

7"
LCA - 17 3/8"
UCA - 15¾"

8"
LCA - 17¾"
UCA - 16"

9"
LCA - 18¼"
UCA - 16¼"

10"
LCA - 18¾"
UCA - 17"


For 1/2" lifts take the difference from the one above and below. So for example a 4.5" lift would be LCA - 16.5" and the UCA - 15".

I don't advise running short arms on anything over 6", but the measurements are there if you want them...

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'89 XJ Cherokee Laredo - build thread
'88 MJ Comanche Pioneer SWB - build thread
'87 MJ Comanche LWB
'94 YJ Wrangler - build thread


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LIFETIME MEMBER
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Date:
Sweet info Adam.
With my lift i got lower control arms, Been thinking of getting uppers, Now i know the length.

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1999  XJ  SPORT,  4.5'' LIFT,  32'' X 11.50''  TIRE'S



" IF  IT  AINT  RUFF  IT  AINT  ME  !  "

LIFETIME MEMBER
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Posts: 631
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I'm running a set of 16.250" LCA's with my 4" lift. Curious as to what an extra 1/8" would change my caster angle. I'm at 5*-5.9* right now, and that's with a 3/8" shim behind them. Could use a little more angle, but with my LP D30, the pinion angle comes into play.

-- Edited by firehawk at 21:47, 2008-01-15

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2000 Cherokee Sport




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GLXJ PRESIDENT
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Posts: 3934
Date:
And here is the lengths WITH RE drop brackets.

4"
LCA - 15
¾"
UCA - 15"

5"
LCA - 16"
UCA - 15¼"

6"
LCA - 16"
UCA - 15½"

7"
LCA - 16"
UCA - 15¾"

8"
LCA - 16
¼"
UCA - 16"

9"
LCA - 16
½"
UCA - 16¼"

10"
LCA - 17"
UCA -
16½"

__________________
'93 XJ Cherokee Sport - build thread
'89 XJ Cherokee Laredo - build thread
'88 MJ Comanche Pioneer SWB - build thread
'87 MJ Comanche LWB
'94 YJ Wrangler - build thread


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