2" RC spacer lift - afterthoughts - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 9 (permalink) Unread 09-30-2019, 10:59 AM Thread Starter
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2" RC spacer lift - afterthoughts

I wondered after installing it, should i get longer sway bar links?

Im asking because i sometimes hear a knocking sound when the body is swaying over bumps and parking bumps etc.

Getting more frequent now - wondering if i didn't consider something in my build?

Thoughts anyone?

Similar issue with yours?


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post #2 of 9 (permalink) Unread 09-30-2019, 04:11 PM
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Quote:
Originally Posted by chaaz01 View Post
I wondered after installing it, should i get longer sway bar links?

Im asking because i sometimes hear a knocking sound when the body is swaying over bumps and parking bumps etc.

Getting more frequent now - wondering if i didn't consider something in my build?

Thoughts anyone?

Similar issue with yours?
Have you had your front upper differential bushing replaced yet?

I'd also consider getting your front upper & front lower control arms bushings checked out; it could be that your front upper or front lower control arms need to be replaced.


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Last edited by Big Blue; 09-30-2019 at 04:17 PM.
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post #3 of 9 (permalink) Unread 10-29-2019, 02:53 PM Thread Starter
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front upper diff bushing?....never heard of it - i wil try to locate.

As for LCA/UCA bushings - prolly only the lower could be suspect because the upper was new with my JBA kit?


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post #4 of 9 (permalink) Unread 10-30-2019, 04:41 PM
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Originally Posted by chaaz01 View Post
front upper diff bushing?....never heard of it - i wil try to locate.

As for LCA/UCA bushings - prolly only the lower could be suspect because the upper was new with my JBA kit?
Chuck;

The front upper differential bushing is a very common & well-documented point of wear/failure on Commanders & Grand Cherokees alike, due to poor engineering by FCA and it will definitely give you a knock or clunk up in the front end when it goes bad.


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post #5 of 9 (permalink) Unread 10-31-2019, 10:28 AM
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the diff bushing is on the front differential not the UCA. there are 2 on top of the diff and an isolator on the front cover that mates to the front crossmember.
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post #6 of 9 (permalink) Unread 10-31-2019, 02:34 PM Thread Starter
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thanks, ive been looking at the replacement videos - doesnt come out easily :-/

Im thinking i could get a rebuild front diff with all new bushings, then just

-remove/swap front diff
-replace universal joints
-replace hub bearings
-replace LCA's
-replace pads and rotors

call it done for another 100k


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post #7 of 9 (permalink) Unread Yesterday, 07:36 AM
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Originally Posted by drm4633 View Post
the diff bushing is on the front differential not the UCA. there are 2 on top of the diff and an isolator on the front cover that mates to the front crossmember.
I didn't know there were 2 upper differential bushings on top, I thought there was an upper and a lower differential bushing on the front differential.....that's good information.


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post #8 of 9 (permalink) Unread Yesterday, 10:14 PM
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1 above the pinion and 1 on the upper right. And an isolator on the front cover.
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Last edited by drm4633; Yesterday at 10:20 PM.
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post #9 of 9 (permalink) Unread Yesterday, 10:26 PM
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Quote:
Originally Posted by drm4633 View Post
1 above the pinion and 1 on the upper right. And an isolator on the front cover.
Thanks for the pic @drm4633 ;




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