Need advice on Vibration issues

hitman · Sep 24, 2007

1) I have an issue where I'm driving over bumps\speed bumps and I feel a lot of Vibration under my feet on drivers side.

2) Another issue I've been having is say I'm at a stop light & as I drive making a slow left or right turn I 'hear' a vibration (like driving over rumble strips) in the back end. Almost like the back is making a 'dragging' sound if that makes sense. This also happens if the read-end has a lot of weight on it. For example I had some patio bricks in the back above the rear axle.

I recently got new Tires, Tie rods, brakes but issue was there before the purchase.

My D is a 1999 and has 114k miles. I'm the original owner. Shocks were replaced at around 60K.

Thanks,

FSTDANGO3 · Sep 24, 2007

If the rear end fluid has been changed recently it sounds like they didn't add the Friction modifier additive to the rear Posi unit
Steve
DOC Pres

dizzyD · Sep 25, 2007

Have you been hearing a "howlinging" coming from the rear? I'd lean on the the friction modifier missing in rear diff, as for the front end vibration on speed bumps, I take it you have a 4wd? Do you feel it through the steering wheel or thru your feet, both?

hitman · Sep 25, 2007

1) The vibraction is only noticable under my feet not in the steering. I have the 4wd Full time transfer.

2) The rear differential fluid was changed recentlly but I think the problem was there before they changed it. I don't know if they added the Friction modifier additive. As for the howling, no. I know that problem I've had the rear pinion bearings replaced in the past along with a new rear differential and u-joints.

Thanks!

Raven · Sep 25, 2007

I think I may have an answer to this one! Same truck and very similar mileage too!

I have/had identical issues that your are describing. In my case there were two separate issues:

1. the floor/foot vibrations - The truck is old and some of the rubber bushings are worn out. The body mount bushings are hard and dry and are allowing more vibrations to reach the cab. Mine got much more pronounced when I added aftermarket running boards (direct mechanical link between frame and body.) I think, unless you're wealthy, this is one of those things we need to accept with a high mileage truck!

2. The 'rubbing tire' vibration issue - There have been several people that have described this. For my truck, it seemed to only appear after the first stop after a long highway run. It'd seem like a tire was rubbing, or, that the rear end was binding somehow. I even had the rear end inspected, fluid/additive changed and it was still there. What fixed it you ask? Replace the brake fluid! The brake fluid was full of clots and it was acting like a check valve and not allowing the fronts (reciently replaced) to fully retract. I know it seems odd, but, that was the cause for this issue with several people. For about $10 in fluid and an hour of your time, it's well worth trying! Do a complete flush. :?

Good luck!

MWeed · Sep 25, 2007

There are several possibilities. You could have a bad u-joint, a front diff going bad, or several other things wrong. Have you checked the shock bushings? You say it's more prone to happen when the front end is unloaded. I woud check the rest of your front end for worn broken components.

While I disagree with Raven on comment #1, His second point is well taken. None of us should just have to live with a vibration like that. Change your brakefluid annually. There are several, mine included, D's with both age and high mileage that don't have that vibration problem. Something obviously is wrong, we just have to give you enough places to check to find it.

FSTDANGO3 · Sep 25, 2007

I have heard of the Brake fluid issue before as well
Steve
DOC Pres

lrickers · Aug 4, 2017

I have this exact same issue with my Durango, which is also a 1999 and a 5.2L. I replaced all of my brake fluid, the front hydraulic hoses, the rear hydraulic hose, the rear wheel cylinders with complete brake job, the front wheel hub bearing assemblies (which needed to be replaced) the rear wheel bearings, the drive shaft u-joints, and thoroughly went through the front calipers, which are not dragging or sticking at all. My "axle drag" is most prone after several miles of driving (greater than 50) and is most dramatic when starting to take a left turn from a complete stop. If I am taking a right hand turn, the effect is less, but present. If I am pulling straight ahead from the same complete stop, the friction or dragging sound does not occur. Somehow, it is a axial or lateral force that occurs when turning left from a stop after several miles of highway speed. It seems like it is in the left rear, but this could be deceptive.

All this said, I do agree that it still could be a gripping brake that does not release, except for it does not drag when pulling straight ahead from a complete stop. Only while turning. What I have not yet done is replace the rear brake lines from the center distribution block to each individual wheel cylinder. The existing brake lines externally appear to be in excellent condition. No pitting and no substantial rusting and no binds. But it is possible that a chunk of crap could be plugging the line.

Any other thoughts?

Need advice on Vibration issues

hitman

FSTDANGO3

dizzyD

hitman

Raven

MWeed

FSTDANGO3

lrickers

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