drivetrain vibration - Dodge Cummins Diesel Forum
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post #1 of 31 (permalink) Old 11-01-2009, 06:13 AM Thread Starter
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drivetrain vibration

on my 1999 3500 4x4 i have a vibration at around 35mph, 55mph and 70mph. it feels like a tire out of balance but after having the tires balanced and then moving the tires around on the truck the vibration never changes. i have replaced the track arm, rotors, calipers, and brake pads. i have replaced a u-joint on the front driveshaft that was visably bad and also the hanger bearing on the rear shaft. i am at my wits end and any suggestions with where to check next would be greatly appreciated.


1994 Dodge 3500 4x4, Auto. 150k miles, Fuel Pressure Gauge, EGT Gauge, Boost Gauge.
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post #2 of 31 (permalink) Old 11-01-2009, 08:33 AM
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Check rear u joints for side to side movement sometimes the bearings are not worn but you can slide it a tiny bit side to side on the trunnion which will throw your drive shaft out of balance. I have seen driveshafts get a slight twist from a whole lot of power but in your sig the truck looks stock. You could also have a pinion bearing starting to go in the rear axle which can cause some vibration but usually it is a steady growl.

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post #3 of 31 (permalink) Old 11-01-2009, 09:42 AM
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Is the speed of vibration the same at all these speeds?? Does the steering wheel shake back and forth or up and down?
Generally a drive line vib will be very fast and hear it better than feel.
A tire, wheel, axle vib will be much slower and will shake your stomach, the hood or mirrors more so.

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post #4 of 31 (permalink) Old 11-01-2009, 03:11 PM Thread Starter
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It shakes the hood and dash, the speed of the vibration gets worse as you get faster but its not alot worse, if that makes any sense. there is no shaking in the steering wheel. i will check the driveshaft for the side movement.

1994 Dodge 3500 4x4, Auto. 150k miles, Fuel Pressure Gauge, EGT Gauge, Boost Gauge.
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post #5 of 31 (permalink) Old 11-01-2009, 03:41 PM
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How many miles you got on her? I would take a look at the pinion bearing too. Sounds like it's a rotational issues as it comes in and out at different speeds. Is you driveshaft missing any weights?

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post #6 of 31 (permalink) Old 11-01-2009, 04:58 PM
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sounds like the death wobble to me

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post #7 of 31 (permalink) Old 11-01-2009, 05:38 PM Thread Starter
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it's not nearly as bad as the death wobble. the truck has 150,000 miles on it, and i haven't found any place on the driveshaft where a weight has come off.

1994 Dodge 3500 4x4, Auto. 150k miles, Fuel Pressure Gauge, EGT Gauge, Boost Gauge.
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post #8 of 31 (permalink) Old 11-01-2009, 10:50 PM
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ive been chasing this problem since i bought my truck.

a clink/clank when i shift, plus a vibration.


I think i have narrowed it down to the carrier bearing on the drive shaft. It moves more then i think it should. Looking into getting a one-piece drive shaft made for it. Searching around, looks like its a hot thing for the 3rd gen guys.

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post #9 of 31 (permalink) Old 11-01-2009, 11:10 PM
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I have the same problem and was just about to post and ask about it. i usually have the problem when on the highway pulling a hill and it down shifts. it usually feels like it just shakes it self away. i know doesnt make sense but it starts shaking and then the shaking slows down fast til it goes away

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post #10 of 31 (permalink) Old 11-01-2009, 11:22 PM Thread Starter
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Quote:
Originally Posted by Ditch Baby View Post
ive been chasing this problem since i bought my truck.

a clink/clank when i shift, plus a vibration.


I think i have narrowed it down to the carrier bearing on the drive shaft. It moves more then i think it should. Looking into getting a one-piece drive shaft made for it. Searching around, looks like its a hot thing for the 3rd gen guys.
i read the thread you started and my problem is exactly like yours and katooms. my vibration actually feels like its coming from the right front though. allthough i can convince myself that its coming from the left front and the rear.

1994 Dodge 3500 4x4, Auto. 150k miles, Fuel Pressure Gauge, EGT Gauge, Boost Gauge.
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post #11 of 31 (permalink) Old 11-01-2009, 11:34 PM
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I chased this prob last year 240k replaced every thing turnd out to be worn spline on front shaft new shaft no more prob.
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post #12 of 31 (permalink) Old 11-01-2009, 11:44 PM
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The issue is almost certain to be a tire issue. Balancing will not cure out of round or radial force varation. There may be some benfit to using a balancing material placed inside tire. Can you try a set of standard tires and wheels from a stocker??

2008 3500 stock QCLB dually Inferno red. Toys: Fuel injected Rampage, Road Grader, 1586 tractor, 60K genset, Honda ATV, and more. Back in business with a Hitachi EX270LC excavator. The dirt slinging has begun with 50+ acres to clear.
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