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Driveline Vibration

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Old Dec 11, 2010 | 03:29 AM
  #1  
flushpuppyTRb's Avatar
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Year: 2000
Model: Cherokee
Engine: 4.0L I6
Default Driveline Vibration

I am getting a weird driveline vibration and im trying to diagnose it. i would like some help

Jeep:
2000 LP30/8.25
4.5" lift, 32s (no SYE)

Symptoms:
The vibration is from 58-67 mph. Anything higher or lower i feel nothing. it is also ONLY when i am on the gas, when i let off, it goes away.

the front driveshaft u joint has a little bit of play in it, but the part that bugs me about it so much is that its only from about 58-67

any suggestions would be greatly appreciated
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Old Dec 11, 2010 | 04:58 AM
  #2  
freegdr's Avatar
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Joined: Mar 2010
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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Get ridof the play new u joint maybe
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Old Dec 11, 2010 | 06:32 AM
  #3  
PJsJeep's Avatar
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I have the same problem. I removed my front shaft and all the same, removed rear shaft and problem went away. Replaced u joints and no luck, I am going with a sye. Just put my lift on and its only three inch but I have a 2000, which have problems.

Try removing the front driveshaft and drive it.
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Old Dec 11, 2010 | 06:35 AM
  #4  
freegdr's Avatar
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From: Broward County Fl.
Year: 1989 xj sport 2dr
Model: Cherokee
Engine: 12 hole bosch Injectors
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Originally Posted by PJsJeep
I have the same problem. I removed my front shaft and all the same, removed rear shaft and problem went away. Replaced u joints and no luck, I am going with a sye. Just put my lift on and its only three inch but I have a 2000, which have problems.

Try removing the front driveshaft and drive it.
do you have the tc drop kit
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Old Dec 11, 2010 | 07:44 AM
  #5  
tannerp89's Avatar
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From: Coeur d' Alene, Idaho
Year: 1998
Model: Cherokee
Engine: 4.0 rebuilt w/ bored TB, banks header, upgraded ignition, 3 row rad, high flow h2o pump, 180* t-stat
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Originally Posted by flushpuppyTRb
I am getting a weird driveline vibration and im trying to diagnose it. i would like some help

Jeep:
2000 LP30/8.25
4.5" lift, 32s (no SYE)

Symptoms:
The vibration is from 58-67 mph. Anything higher or lower i feel nothing. it is also ONLY when i am on the gas, when i let off, it goes away.

the front driveshaft u joint has a little bit of play in it, but the part that bugs me about it so much is that its only from about 58-67

any suggestions would be greatly appreciated
key clue right there.
vibrations that go away on deccel are bad U-joints.
stress on Drive shaft is taken away on deccel causing the caps to stop moving on the trunnions. bearing surfaces are most likely brinelled or needle bearings are toast.
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Old Dec 11, 2010 | 09:57 PM
  #6  
teh BOMB's Avatar
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From: Rapid City,SD
Year: 1988
Engine: 4.0
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I agree change the u-joint and go from there!

Good luck
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Old Dec 12, 2010 | 11:49 AM
  #7  
256offroad's Avatar
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Joined: Nov 2007
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ive got the same problem except i have replaced the rear joints with good spicer ones as well as put anti seize on the slip yoke to try to 'lube' it.

still there. gonna try to pull the front driveshaft.


mine is a combo grinding/vibrating.
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