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post #1 of Old 03-31-2009, 05:42 AM Thread Starter
bigpiper1
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bad vibration

first off I have a 2002 dakota quad cab with a 4.7L v8. My problem is I have a bad vibration that basicly shakes my truck when i hit about 55 mph. as soon as i take my foot off the gas it goes away and when i hit the gas again it comes back. I have had my tires rotated and balanced, I put new break roters on, and I replaced the passenger side cv joint. i have had it. I need some help please. Thank you, Josh
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post #2 of Old 03-31-2009, 06:13 AM
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sounds like a bad ujoint
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post #3 of Old 03-31-2009, 06:18 AM Thread Starter
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how do i tell if it is or not? Also how hard is that to replace?
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post #4 of Old 03-31-2009, 06:20 AM
Rudnik
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grab the driveshaft near the back joint and shake it.. if there is play then its bad..
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post #5 of Old 03-31-2009, 06:36 AM Thread Starter
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i also read that there are balance weights on the drive shaft. is it possible for one of these to have come off and cause the problem?
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post #6 of Old 03-31-2009, 08:04 AM
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Huh, i have the same damn problem. is yours a 2wd or 4wd? As far as the weights on the drive shaft, there welded on so i doubt they came off. did you check the fluid level in the trans or the fluid in the rear end?


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post #7 of Old 03-31-2009, 04:47 PM Thread Starter
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Quote:
Originally Posted by Dj Wolf View Post
Huh, i have the same damn problem. is yours a 2wd or 4wd? As far as the weights on the drive shaft, there welded on so i doubt they came off. did you check the fluid level in the trans or the fluid in the rear end?
mine is a 4wd.. the trans fluid is fine but i would be willing to bet my life that vibration is coming from the front end. I forgot to add before that every once in a great while when i shift from park to either reverse or drive i get a clunk noise.
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post #8 of Old 03-31-2009, 05:26 PM
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Quote:
Originally Posted by bigpiper1 View Post
mine is a 4wd.. the trans fluid is fine but i would be willing to bet my life that vibration is coming from the front end. I forgot to add before that every once in a great while when i shift from park to either reverse or drive i get a clunk noise.
I have the same clunk when shifting to reverse from park. I was also told it might be a bad u-joint.
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post #9 of Old 03-31-2009, 05:49 PM
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Bad u joint

98 dak sport 5spd 2wd
Ext mods: weathertech weatherflectors, pilot navigator driving lights, eagle fiberglass tonneau cover, 31 x 10.5 toyo open country a/t tires, #9007 silverstar headlight bulbs, clear corners.

Engine mods: Removed snorkel, removed rubber flap, ngk v-power plugs, K&N drop in filter.

Interior sound: Kenwood KDC2200 headunit



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post #10 of Old 03-31-2009, 05:50 PM Thread Starter
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Quote:
Originally Posted by Mt.Hoodlum View Post
I have the same clunk when shifting to reverse from park. I was also told it might be a bad u-joint.
i have put enough unneeded money into my front end and want to make sure that this is going to fix the dam problem.
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post #11 of Old 03-31-2009, 05:52 PM Thread Starter
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Bad u joint
are you sure? I crawled under my truck and tried to move the drive shaft and it didnt move. so im really confused now
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post #12 of Old 03-31-2009, 07:15 PM
Mt.Hoodlum
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Should be the rear end no? Are you 2wd or 4wd? Im not sure but it would be the rear U-joint wouldnt it? Are you checking the front U-joint on the front driveshaft, that would only be engaged when in 4wd....right? Have you checked the rear U as that is where the power is transfered when in 2wd putting it in reverse right?
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post #13 of Old 04-02-2009, 02:57 AM
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Guys, not all u-joints that are bad are loose...if they are out of lube and stuck, the shaft will not move the way it should and will create one hell of a vibration. Esp in the front end, since all the components are designed to move anyway...
You may be getting a slight squeaking from it too...but the best way to really test is to remove the driveshaft and move em around to see if they are stuck or sticking...
Good luck!

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post #14 of Old 04-02-2009, 03:34 PM
ck98daksport
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fixed an older ranger that had a really bad vibration at 45, whole hood would just start shaking, was the u joint by the diff. Grab hold of the drive shaft and see if there's an excessive amount of play in any direction. Turns out that the needle bearings under one of the caps were totally disintigrated. I don't remember if it was a greaseable joint or if it was a sealed one but that was the problem.

98 dak sport 5spd 2wd
Ext mods: weathertech weatherflectors, pilot navigator driving lights, eagle fiberglass tonneau cover, 31 x 10.5 toyo open country a/t tires, #9007 silverstar headlight bulbs, clear corners.

Engine mods: Removed snorkel, removed rubber flap, ngk v-power plugs, K&N drop in filter.

Interior sound: Kenwood KDC2200 headunit



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