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Old 11-22-2010, 05:20 PM   #1
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Vibration

I have had a vibration since I purchased my 99 Sport -5 spd. A few months ago. It only does it in first gear when starting out. I guess the best way to describe it is - like when rpms are too low but worse. It only lasts a second. I have added a BB but it was like this before the lift. Any suggestions where to look?

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Old 11-22-2010, 05:30 PM   #2
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suscribing........i might have same issue.

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Old 11-23-2010, 10:07 AM   #3
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Anyone have a suggestion?
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Old 11-23-2010, 10:19 AM   #4
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Vibrations in the wheel?
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Old 11-25-2010, 06:47 AM   #5
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i had the same issue, it lasted for about a month then just went away the other day. it kinda feels like its going to stall out when in first gear coming from a stop right? i also added a lift but it started before the lift was installed and continued after i got it back.
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Old 11-25-2010, 06:37 PM   #6
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Just a thought, but what kind of tires are on your Jeep? when i put mud tires (Dunlap mud tires) on my 99 it did exactly the same thing.....
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Old 11-26-2010, 11:38 AM   #7
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I was askin a uncle he said might check idle control sensor
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Old 11-26-2010, 02:54 PM   #8
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I doubt wheels. Had two sets of those - factory and steel.

I don't think it is the tires. I've had two sets on and it did it with both.

It Definitely is worse when starting on an uphill than a downhill.
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Old 11-26-2010, 02:59 PM   #9
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Quote:
Originally Posted by 25172021k View Post
I doubt wheels. Had two sets of those - factory and steel.

I don't think it is the tires. I've had two sets on and it did it with both.

It Definitely is worse when starting on an uphill than a downhill.
I'd start off with checking the driveshafts anytime you feel a vibe. Have you checked your angles, U-Joints, etc?
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Old 11-27-2010, 05:37 AM   #10
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is that something that could fix itself tho? mine stopped maybe a week or two ago and hasnt come back.
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Old 11-27-2010, 06:35 AM   #11
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drive shafts or u joints......................

I know just it just happened to me
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Old 11-27-2010, 06:52 AM   #12
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could it cause worse problems if not fixed immediately?? If I could let it go until after Christmas that would be great-especially since it is not really all that bad right now- but if it needs fixed now...it needs fixed now.
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Old 11-27-2010, 10:47 AM   #13
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what does a guy look for to check the driveshaft or u joints?
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Old 11-27-2010, 12:09 PM   #14
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You have to check for excessive play in the u joints. The wheels have to be off the ground and it helps if it is in neutral. Grab the driveshaft at the u joints and move it in an up/down motion while checking for play. If it is the type of vibration that shakes the steering wheel when you are just pulling away and then it disappears it is definitely a driveline vibe.
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Old 11-27-2010, 01:48 PM   #15
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Check the engine and tranny mounts. Sounds like the engine rocks to the side slightly when you apply power. First gear's more pronounced due to the torque multiplication.
You may be able to see it rocking - hood open, watch the engine, have someone move it in first gear.

First look at them, you may see they are deteriorated.

Then jack up the engine enough to take the weight off it while watching the mounts. You'll see them try to separate if bad.
Do the same for the trans mount.
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Old 11-27-2010, 10:07 PM   #16
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sounds like i must have something rocking cuz it does it when i first take off but for only a second or two and then it quits. it sounds like it is coming from right underneath my shifter.

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