Drivetrain clacking after hitting bump
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Drivetrain clacking after hitting bump
2001 Durango 4.7 4wd
I have no noise going down the road until I hit a bump or the transition from pavement to bridge joint etc. Hitting a bump starts what sounds like something that is spinning has then gone out of balance. Similar sound as a CV Shaft. The noise will continue until I come almost to a complete stop at which point I can now here a light "clunk clunk" as whatever it was goes back in to its original position. It is only set off by hitting a bump.
It really is a lot like the sound a front driveshaft joint would make except it goes away when you stop and only starts again after being jarred.
Here is all the information I have. Some or all may be connected
I've checked the X-fer case fluid. It's clean.
Front drive / propeller shaft is currently not in the vehicle. This was my running theory all winter. I thought it was the CV shaft on the xfer case end wearing out. It makes the noise even with it out of the vehicle.
I have a Service 4wd light that is on intermittently. When its on, the vehicle will not go in to 4wd. This may or may not be connected.
Initially the noise was quiet and would be louder on colder days. Just over this weekend it started getting much louder. From the original "Soft clacking" to a now louder "clunking". It has the continuous repetitive sound of something spinning or turning at a fairly constant speed.
When I brought it in to the garage this weekend I found the front drivers side wheel bearing had actually come loose. One bolt was missing, remaining two were loose. Thats been remedied. New bolts, loctite. I
I have replaced the front driver side CV axle and both front wheel bearings in the last year.
Putting vehicle in neutral does not change the sound
Going from 2WD to 4WD does not change the sound.
The vehicle does not pull to the left or the right any more than would be normal with the crown of the road.
I've pulled most of my hair out.
I have no noise going down the road until I hit a bump or the transition from pavement to bridge joint etc. Hitting a bump starts what sounds like something that is spinning has then gone out of balance. Similar sound as a CV Shaft. The noise will continue until I come almost to a complete stop at which point I can now here a light "clunk clunk" as whatever it was goes back in to its original position. It is only set off by hitting a bump.
It really is a lot like the sound a front driveshaft joint would make except it goes away when you stop and only starts again after being jarred.
Here is all the information I have. Some or all may be connected
I've checked the X-fer case fluid. It's clean.
Front drive / propeller shaft is currently not in the vehicle. This was my running theory all winter. I thought it was the CV shaft on the xfer case end wearing out. It makes the noise even with it out of the vehicle.
I have a Service 4wd light that is on intermittently. When its on, the vehicle will not go in to 4wd. This may or may not be connected.
Initially the noise was quiet and would be louder on colder days. Just over this weekend it started getting much louder. From the original "Soft clacking" to a now louder "clunking". It has the continuous repetitive sound of something spinning or turning at a fairly constant speed.
When I brought it in to the garage this weekend I found the front drivers side wheel bearing had actually come loose. One bolt was missing, remaining two were loose. Thats been remedied. New bolts, loctite. I
I have replaced the front driver side CV axle and both front wheel bearings in the last year.
Putting vehicle in neutral does not change the sound
Going from 2WD to 4WD does not change the sound.
The vehicle does not pull to the left or the right any more than would be normal with the crown of the road.
I've pulled most of my hair out.
Thread Starter
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Registered User
Joined: Apr 2016
Posts: 2
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** Solved ** The axle shaft bearing at the end of the front axle tube was warn. It would spin relatively freely and smoothly but when I'd hit a bump it would send it bouncing around in the shaft.