My Cherokee is a 2001 Sport with the command trac and 74,000 miles. I installed a 2" coil spacer/shackle lift w/new shocks-rear leafs are in good shape. The minor difference that I notice is a slight vibration right at 30-35 mph and it disappears above that even at highway speeds. I installed several washers to the factory transfer case fasteners to temporarily drop it about 1/2" just to see if there is any difference (the bolt studs are not long enough to safely drop it further) and it seems even more subdued now.

My question is: Is this a typical experience for a 2001-do drive line vibrations usually appear at 30-35 mph? And, given they are very minor, is it worth trying to drop the transfer case further to eliminate them entirely?

 

Hi, some jeeps go 3-4 inches without dropping the Tcase and some need it at 2 like yours. I put a 3 inch in mine and had a vibration so I dropped mine 1 inch and it went away...Tj

 

same here 30to35mph.where do you get axle shims?

 

You can get the kit for the Tcase or shims for the rear from eBay or just go to Rough Country.com or just about any 4 wheel drive site...Tj

 

I too have a 3" and dit the 1"tcase drop to correct. I chanced the bolts/studs and made my own tcasedrop with 1" square stock.
Good luck!

 

I just did the same lift as OP and have vibes at 50-55.

 

I just put 4.5" on my 2000 XJ. I have vibes from 25-40, but then they go away up to 75 at least. They aren't bad enough for me to worry about. I got an SYE and 1310 flange on the way this week so I'll just ride it out until I can get that thing installed.

Every Jeep is different. I was afraid mine would not be driveable without the SYE installed. I had heard stories about the later model Jeeps needing a tcase drop or SYE at even 3". But I threw the 4.5 on and it's not a big deal.

 

yea the earlier ones (91-96) seem to take the lifts better, don't know y, and a manual will have less vibs due to the slightly longer drivesaft out back. but it all depends on the jeep. i had a 6.5" short arm on mine with a 1 inch drop and never had vibrations the whole time i drove it, then i switched to a 94 from a 88 and put a long arm upgrade on it and the thing shook like no other. all depends on the jeep

 

If you haven't changed the tires and/or tire balance. I'd consider getting the front end aligned.

Most of the Lifts recommend it anyway.

Even though a 2" Lift doesn't sound like much, the 2000 and up came with a low pinion Dana 30 which limits the degrees or angles you have to work with in changing the drive line/pinion angles as a result of lifting it.
This means that they are much more susceptible to vibes.

There are instrux online on how to check this yourself.

A good alignment is good for tire wear and longevity anyway.

 

1"tcase drop FIXED IT Thank you!