Noise cab Mount or Suspension

[dieselscout80]

We had some construction work done on our property and it created a small ledge in the loop around the barn.

When my 2020 Ram 2500 goes off this ledge started making a thunk noise when the left front tire drops off it at less than say 5 mph. The small ledge aka drop off is less than 5” and likely less than that.

I’m thinking it’s either the left front cab mount or the left front shock, but what do you think?

Here is a video of it.

 

[dieselscout80]

I can feel it when it happens in my feet.

It only happens in this one location.

 

[Ostracize]

Cab mount imho

 

[dieselscout80]

I decided to loosen the driver’s side front cab mount and retorque it.

When I loosen it water came pouring out.

Took the bolt all the way out and then retorqued it to 80 pound feet.

I’m wondering if I should take it back off completely (raise cab a bit) and use silicone on it to seal it so water doesn’t get back into it?

Will drive over that spot later today.

 

[dieselscout80]

Well I drove across the same spot and the noise is gone.

Basically I think the water was hydro locking the cab mount and preventing it from moving. I think they are hydraulic cab mounts that compress to cushion the cab.

They likely either need sealant or a drainage hole in the lower washer.

 

[Ostracize]

Well I drove across the same spot and the noise is gone.

Basically I think the water was hydro locking the cab mount and preventing it from moving. I think they are hydraulic cab mounts that compress to cushion the cab.

They likely either need sealant or a drainage hole in the lower washer.

Good find.
Though I'd consider replacing the mount. They are made to be sealed units... If water is present I'd think it is compromised.

 

[dieselscout80]

Good find.
Though I'd consider replacing the mount. They are made to be sealed units... If water is present I'd think it is compromised.

I think the sealed part is the cushion that is above that washer and it needs to be able to expand into the void above the washer and I think the water was preventing the expansion.

When I first saw the liquid coming out was worried it was them mount leaking, but it was definitely water.

I DM’d @RamCares to see if there is any recalls, updated parts numbers or TSB on the cab mounts, no response yet.

 

[RamCares]

I think the sealed part is the cushion that is above that washer and it needs to be able to expand and I think the water was preventing the expansion.

When I first saw the liquid coming out was worried it was them mount leaking, but it was definitely water.

I DM’d @RamCares to see if there is any recalls, updated parts numbers or TSB on the cab mounts, no response yet.

We were contacted by you on an entirely different platform, to which we replied. We would advise checking there for our follow up!

Chris,
Ram Cares