New 2500 Tradesman with clunk/rattle

[BTGREEN]

One of the problems for me was they couldn't figure it out. FCA Star engineers were even involved. I'm not happy that th3r noise is back. Gotta start the whole process over again

I thought I read somewhere that there is a tuned mass damper on these new trucks, I believe under the driver kick panel near the frame rail. That could be an issue that is causing the noise since it contains moving parts. Our company doesn't have any 2019+ trucks, or else I could check exactly where it was.

 

[Tim G 2019]

I thought I read somewhere that there is a tuned mass damper on these new trucks, I believe under the driver kick panel near the frame rail. That could be an issue that is causing the noise since it contains moving parts. Our company doesn't have any 2019+ trucks, or else I could check exactly where it was.

They checked that and another noise dampening module. No dice. They were pretty convinced it was cab mounts. Trouble is, even replacing them has been no permanent fix. Wish I could try something aftermarket with a different construction to see if that fixes it. It is better, and it may be that I'll have to learn to live with it on washboard roads or potholes common here every year. It is disappointing to have a noise problem in a new truck and it's certainly not fun making the payments while it sits in the shop. Plus, I bought it to pull my boat, so I lost a month of prime boating season last year. Bummer.

 

[Firstram1980]

If it’s bad cab mounts and even new ones don’t fix the problem, then are all trucks making the noise and just a few are complaining? Or just a bad batch? But then new ones should fix it.....Maybe they all do it, it just doesn’t bother most people...so confused.

 

[ddown]

I remember here in the North Country replacing cab mounts with drilled Hockey pucks never a noise.

 

[MartyZ]

So hear me out on this, just an idea. Could it be possible that your truck ended up with a chassis or frame that was slightly out of tolerance (twisted or skewed) that is allowing the cab / Bed to rock due to an uneven mounting surface? Replacing the mounts in that case probably wouldn't fix the problem since your'e never actually making full contact at all the points at once? I'm not sure how thorough they are with quality certifications in Mexico but I'm assuming there is a small chance your truck could have got pushed through with this issue and no one was aware of it. That or something is loose in your suspension / drive-train system. I get a clunk in the front end if my suspension drops down while accelerating over small mounds. I haven't dug into where it's coming from exactly because it literally only happens if I'm on the throttle heavy and going over this small mound by a round-a-bout where i live. Could just be the suspension hitting the downward over-travel bumpers.

 

[RedneckHippy]

I don’t even like the idea of fluid filled cab mounts, the wife’s infinity used a fluid filled bushing for the transfer case mount on her Infiniti, and once that rubber gets a couple years old and cracks a little bit the fluid comes out like a gusher and loses rigidity, I’ll definitely be swapping those out with solid pieces the second one pops. As far as build quality from the factory, I don’t think it is great. My alignment was terrible at 500 miles on the clock. The caster was so far out of adjustment that it leaned around corners and even sat unlevel. I adjusted them to spec and torqued then down and the truck leveled out side to side and drives insanely better around the corners.

 

[Tim G 2019]

All the suspension parts were checked and re torqued to tolerance. Never thought about frame. They seemed to think this was a bad batch of cab mounts. I don't think they all do it. I'll bet it was a certain run of trucks. I'll also bet they change their mind on using that type of mount on future models There are a lot of clunky noises out there. I think they put all the noise reduction stuff on the 2500's due to complaints, but some of those ideas created this new series of unintended problems. That's why i usually don't buy the first run of an updated vehicle. This time, I just loved the truck and the look, so I did it. That's the only problem I've had, but it's just maddening to put up with that noise on our rough winter roads

 

[Firstram1980]

If it’s a bad batch, shouldn’t new ones have fixed it?

My truck is At the dealer now. Not expecting a fix but who knows. Will update.

 

[Tim G 2019]

Bad batch question was one i asked. I don't get the sense that they can identify it very well. They didn't say, but maybe these just have a high failure rate. The ones they fixed my truck with were tested on another truck first and then put on mine as "known good" parts. I don't know yet if it is those that failed again or ones that were ok then but have now failed. I do know this guinea pig stuff isn't what I signed up for

 

[Motoman501]

Mine still does it, just a pain to take it in so I haven't yet..... I've been hoping a solid solution would be found.

 

[Tim G 2019]

Mine still does it, just a pain to take it in so I haven't yet..... I've been hoping a solid solution would be found.

Yeah me too. Hoping for a silver bullet. So far - no luck

 

[MartyZ]

Yeah me too. Hoping for a silver bullet. So far - no luck

You should try to get a pry bar between the Box / Cab and frame next to the mounts and see if there is slop there. Not sure how easy they are to get to but some poking and prodding usually gets me closer to the root cause on most of the wrenches thrown at me throughout life. If you can rule out the mounts then you can quit chasing that tail and find a new one. maybe shock mounts / bushings or your springs? Axle mounts? Maybe something attached to your frame like a receiver or skid plate? You could also mount a Go-Pro in various areas and get some video of things when you get the sound. Maybe its something you can visually see? I would try to get the sound without driving it first so you can see it first hand. One time i mounted my go pro to the fender of my durango aimed at the tire because i was getting strange sounds when turning and braking. Turned out it was my upper Ball joint going bad and i was unable to move the tire by hand when it was parked due to the weight of the truck on the tire. When i watched the video i could see the top of the tire slopping outward. When i jacked it up i could easily slop the tire around. But i chased a lot of tails before finding this.

 

[Firstram1980]

Bad batch question was one i asked. I don't get the sense that they can identify it very well. They didn't say, but maybe these just have a high failure rate. The ones they fixed my truck with were tested on another truck first and then put on mine as "known good" parts. I don't know yet if it is those that failed again or ones that were ok then but have now failed. I do know this guinea pig stuff isn't what I signed up for

Had truck at dealer yesterday for front end clunk. It happens when turning going over large incline/decline and bumps. This is another issue going around and word is it is related to cab mounts as well.

There is a tsb for this but my truck was built well after date on the tsb so they said that can’t be it...Anyway they could not replicate the clunk or the rattle in the back of the cab so for now just going to have to live with it.

Hopefully a fix is found.

 

[Tim G 2019]

Had truck at dealer yesterday for front end clunk. It happens when turning going over large incline/decline and bumps. This is another issue going around and word is it is related to cab mounts as well.

There is a tsb for this but my truck was built well after date on the tsb so they said that can’t be it...Anyway they could not replicate the clunk or the rattle in the back of the cab so for now just going to have to live with it.

Hopefully a fix is found.

They tried that crap with me but i learned they can put an electronic listening device on the frame that isolates the source of the noise. It even measures the frequency changes as they make corrections and adjustments. If they work at it they'll find something. I had to get FCA care specialists and engineers involved to get the dealership serious about my issue. It upset the dealership that i called FCA buy i don't care. Just want it fixed.

 

[Firstram1980]

I’ll mention the electronic ears next time. I have to go back for a throttle body tsb (anyone heard of this?) when the part comes in.

Have noticed when going faster over some pretty rough roads I don’t hear the rattle. Usually only hear it at slower speeds. Why would that be?

 

[Cummins3]

Throttle tsb what's ur issue???? Ratylr/noise at low speed for me too

 

[Firstram1980]

Throttle tsb what's ur issue???? Ratylr/noise at low speed for me too

There is no issue. They said it’s a recommended service bulletin. That’s why I asked, as I haven’t heard anything about faulty throttle bodys.

 

[Tim G 2019]

There is a lot out there on rattle/ clunk when wheel is turned or going over uneven surfaces, like turning into driveway from different level pavement.

This clunk happens at low top medium speeds over bumps while going straight. Seems to happen when rear wheels hit thr bump. One guy compared it to thr sound a refrigerator compressor makes when you're moving it into your house. That isn't a bad description. Makes the noise whether loaded or empty, whether trailering or not. Seems worse when warm out dnd not as bad when cold. It doesn't clunk at all when wet send rainy. At least that's what mine does. The "ears" pointed to thr cab mounts.

 

[Firstram1980]

There is a lot out there on rattle/ clunk when wheel is turned or going over uneven surfaces, like turning into driveway from different level pavement.

This clunk happens at low top medium speeds over bumps while going straight. Seems to happen when rear wheels hit thr bump. One guy compared it to thr sound a refrigerator compressor makes when you're moving it into your house. That isn't a bad description. Makes the noise whether loaded or empty, whether trailering or not. Seems worse when warm out dnd not as bad when cold. It doesn't clunk at all when wet send rainy. At least that's what mine does. The "ears" pointed to thr cab mounts.

Yeah. I have them both the rattle in the rear of the cab is most annoying though.

Think I’m going to buy a cheap action cam off amazon and Point it at those rear mounts and see if that shows or can hear anything. Also noticed my rear mounts are not the same as the other mounts. Not sure if that is normal or what.

The rattle does sound like that fridge compressor sound you mentioned, I just feel like cab mounts wouldn’t make that kind of noise....looking forward to figuring this out though!

 

[Tim G 2019]

I haven't done that but want to. I think either the cab or the bed flexes a lot over those bumps but i can't tell which by looking in the mirrors. I told them it seemed to be the bed since it happens when the REAR wheels hit the bumps, but they tell me it's not. Im not feeling the faith in the diagnostic process