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Unread 04-02-2014, 05:46 PM   #1
dacv01
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lift kit help, please

I just installed a 4 inch rough country lift kit on my 1999 jeep grand cherokee. it rides and looks very nice, but after 25 miles per hour i have a bad vibration. one person at rough country told me i need adjustable lower control arms, the other told me i need a different driveshaft. someone point me in the correct direction?

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Unread 04-02-2014, 05:55 PM   #2
ezflip
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Quote:
Originally Posted by dacv01 View Post
I just installed a 4 inch rough country lift kit on my 1999 jeep grand cherokee. it rides and looks very nice, but after 25 miles per hour i have a bad vibration. one person at rough country told me i need adjustable lower control arms, the other told me i need a different driveshaft. someone point me in the correct direction?
I assume this is the basic kit then. In which case, you probably need both. Being a 99, you have rzeppa front driveshaft and the cv joint on it cannot handle the steep angles of a 4" lift. You need to upgrade to a double cardon (u-joint style) driveshaft. Also, your caster/pinion angles are probably bad and there is nothing you can do about it with fixed control arms. You need at least adjustable lowers. But adjustable uppers as well would be allow to fine tune it.
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Unread 04-02-2014, 05:58 PM   #3
dacv01
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okay, what could i start with to drive it for a little? the front driveshaft then control arms? just spend 500 on the kit and some more on labor, wasnt planning on more issues
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Unread 04-02-2014, 06:12 PM   #4
ezflip
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That kit is known to have its problems. So, expect more issues. For now, remove the front driveshaft. That will at lease make it driveable. If you can get to an alignment shop that does free checks, have them put it on the rack and tell you what your caster angle is. Should be around 4.5-6 degrees to avoid driveline vibes at that height. You may not need them right now, but definitely put them on the list if you plan to offroad it at all. Put an adjustable track bar off the list too. Get rid of the drop brackets and drop pitman arm as soon as you can.

BTW, you should have gotten the x-series kit. You will end up spending a lot more money fixing the issues with the basic kit than you would have spent on the x-series...or probably even the long arm kit.
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Unread 04-02-2014, 06:17 PM   #5
dacv01
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okay thats a start. i work at a dealership so getting parts wont be to bad. i jad a buddy install the lift kit at 400. the rest of the work id like to do if i can. the driveshaft replacement and other issued you mentioned can i do those myself? what kind of driveshaft do i need to get?
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Unread 04-04-2014, 11:41 AM   #6
r1raven
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i believe one off a 2002 to 04 wj will work.
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Unread 04-04-2014, 01:23 PM   #7
skain8
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You mean to tell me that you had the audacity to buy a product offered as a "kit" and not have to expend additional money to purchase additional parts to not have issues with your newly-lifted vehicle?
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Unread 04-04-2014, 02:31 PM   #8
dacv01
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no i just wasnt expecting the driveshaft issue- the kit was to easy to install to not have other issues
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Unread 04-04-2014, 02:56 PM   #9
skain8
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And how do you intend to remedy your driveline angle issue without adjustable control arms? Unfortunately, what RC included in their marketing of the base kit was flatly incorrect and grossly misleading.
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'02 WJ: 4.7L, 5", HP44/9", 231HD, tall & skinny KM2's
'99 XJ: stock
'99 XJ: stolen
'06 XK: sold
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