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View Full Version : Cherokee front end vibes?


FokkerDude
10-14-2005, 04:34 PM
HAve you just lifted your Cherokee and are getting front end vibrations? I think I may have found a solution. Your control arms may be too short. Check out this very handy chart I've found. The chart shows the length that the upper and lower control arms should be for optimal pinion angle.

Lift...........Lower Control Arms/Upper Control Arms
********Decimal**Fraction**Decimal**Fraction
Stock........15.75.......15 ........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 ........15.11.......15
5.............16.62.......16 5/8......15.21.......15
6.............16.97.......17............15.44.... ...15
7.............17.36.......17 3/8......15.74.......15
8.............17.81.......17 ........16.09.......16
9.............18.30.......18 ........16.50.......16
10...........18.82.......18 ........16.96.......17

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No Wife, No Kids, No Problems.

kootenaycat
10-14-2005, 07:20 PM
Good info to know, where did you get the specs from?

Why don't you just take a caster angle measurement before, then try to put it back to that spec with the cam-bolts on the LCA's? I can see lot's of lift (over 4") not allowing enought adjustment with stock lca's, but I thought anything under 4" could be brought back to stock alignment specs with stock lca's?

I'm still waiting to order a RE3.5" for my XJ, so want all the info I can get before it goes in!

FokkerDude
10-14-2005, 07:44 PM
I got the chart from a guy I've been trading notes with on JeepForum.com In the case of my jeep, the lift kit I installed came with new LCA's that are 16.5" from eye to eye. But the lowers aren't my problem, the uppers are now a bit too short. I guess you could take measurments before and after the lift is installed and then try to tweak things to make it work, but new and/or adjustable arms make life easier.:) From my understanding up to a 3" lift will not require longer arms, SLE's, etc as it's not really that radical a change. Once you hit 4" and higher, shit begins to happen.

Does the RE 3.5" come with new lower arms? If so, you're set. The uppers will be cool and you shouldn't encounter any nasty vibrations. That's why I originally just wanted to go with a 3" lift (to avoid problems like I've been having) but the deal that was given to me on the 4.5" was just too good to pass up.

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No Wife, No Kids, No Problems.

fourbyfourer
10-15-2005, 09:03 PM
Good info my friend just put a 5.5" lift on his cherokee i'll pass this on to him[cheers]

FrogDog
10-16-2005, 08:11 AM
thanx for info..

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I know, who the fuck asked me anyway ..