BB/Vibrations
10-05-2010, 09:43 AM
#1
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Year: 2001
Model: Cherokee
Engine: 4.0
BB/Vibrations
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?
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?
10-05-2010, 09:52 AM
#2
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Year: 1994
Model: Cherokee
Engine: l6 HO
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?
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?
same here 30to35mph.where do you get axle shims?
10-05-2010, 11:12 AM
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Year: 1991
Model: Cherokee
Engine: 4.o
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!
Good luck!
10-05-2010, 12:57 PM
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Year: 1998
Model: Cherokee
Engine: 4.0 HO I6
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.
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.
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10-05-2010, 01:17 PM
#8
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Year: 1994
Model: Cherokee
Engine: 4.0 H.O. K&N, Borla headers, custom down pipe, magnaflow hi-flo cat, flowmaster to turn down tip
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
10-05-2010, 03:30 PM
#9
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Year: 1998
Model: Cherokee
Engine: 4.0L
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.
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.