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Unread 01-16-2014, 11:43 AM   #1
squirlgod
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1999 XJ Cherokee 
 
Join Date: Jun 2011
Location: Denver, CO
Posts: 360
Hum/Drone/Vibe above 35

Alright so I has some exhaust damage that was causing all kinds of drones and vibes, but I just got that all fixed yesterday and now I still have a slight hum/vibe above about 35. It gets louder the faster I go and It even happens when I'm in neutral and slowing down. I can feel it in the steering wheel and the floor and everything. The main reason for my concern is that its not just a noise....its definitely caused by something vibrating. I have a 3 inch lift and a TC drop and have never had this kind of issue until recently. After researching all I can find is people talking about pinion and driveshaft angles etc but like I said this happens regardless of engine activity and is directly related to speed. Could it just be a wheel out of balance? wheel bearing? any ideas on where to start? thanks

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Unread 01-17-2014, 12:37 AM   #2
sAe23
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1995 XJ Cherokee 
 
Join Date: Apr 2009
Location: Los Angeles / SFV, California
Posts: 2,546
Did anything traumatic happen prior to the vibration appearing, or did you make any hardware changes?
Have you tried rotating the tires to see if the symptom changes?
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Unread 01-17-2014, 09:18 AM   #3
squirlgod
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1999 XJ Cherokee 
 
Join Date: Jun 2011
Location: Denver, CO
Posts: 360
Well to be honest the jeep was stolen and driven to California before i got it back...so I'd say that was traumatic haha. Like I said it had exhaust hanger damage which was causing the exhaust to touch the body in some places but I just got it back from a muffler shop and they did a great job it looks like new. I'm thinking I'm going to rotate the tires and see if anything changes. The thieves didnt take any parts off the jeep and I went over everything when I got it back pretty closely. It really just looks like they just used it as transport. I think the exhaust damage might have even happened when it was getting shipped back so it would make sense that whatever is causing this is caused by typical wear. At least thats what I'm leaning towards
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Unread 01-18-2014, 03:11 PM   #4
sAe23
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1995 XJ Cherokee 
 
Join Date: Apr 2009
Location: Los Angeles / SFV, California
Posts: 2,546
Um, yeah...

Is the steering wheel moving back and forth, or do you just feel vibrations through it?
Do the drive shafts look straight? Any scrapes? Looseness in the U-joints?
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Unread 01-21-2014, 12:12 AM   #5
squirlgod
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1999 XJ Cherokee 
 
Join Date: Jun 2011
Location: Denver, CO
Posts: 360
I'd say I just feel vibrations through it. The driveshafts look alright but I'll double check with a closer eye and give the u joints a good tug to see if theres anything going on there.
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