Tapping on brain trust once again....

[JWA_Two]

Have a 2020 2500 Hemi 6.4 and it is making a whiny noise in the undercarriage toward driver side/transmission area.

I have tried to do research and come across the hemi tick, as well as known exhaust noise for that year/type truck. Not entirely sure what is going on with it, but would love to pick brains prior to dropping off at dealership only to be told there is nothing to be done and be out $250+

It seems to be a bit worse when cold, continues through driving even after warm up and does not seem to change in sound level or pitch based on gear.


Preview attachment RAM NOISE.mp3
https://mail.google.com/mail/u/0?ui...646451&th=1909e63e317415b3&view=att&disp=safe
https://mail.google.com/mail/u/0?ui...646451&th=1909e63e317415b3&view=att&disp=safe


RAM NOISE.mp3
122 KB
https://mail.google.com/mail/u/0?ui...646451&th=1909e63e317415b3&view=att&disp=safe

 

[JWA_Two]

Also, I tried my best to check each pulley, and none of them seem to be causing the sound

 

[BenchTest]

Have a 2020 2500 Hemi 6.4 and it is making a whiny noise in the undercarriage toward driver side/transmission area.

I have tried to do research and come across the hemi tick, as well as known exhaust noise for that year/type truck. Not entirely sure what is going on with it, but would love to pick brains prior to dropping off at dealership only to be told there is nothing to be done and be out $250+

It seems to be a bit worse when cold, continues through driving even after warm up and does not seem to change in sound level or pitch based on gear.


Preview attachment RAM NOISE.mp3
https://mail.google.com/mail/u/0?ui...646451&th=1909e63e317415b3&view=att&disp=safe
https://mail.google.com/mail/u/0?ui...646451&th=1909e63e317415b3&view=att&disp=safe

View attachment 546572
RAM NOISE.mp3
122 KB
https://mail.google.com/mail/u/0?ui...646451&th=1909e63e317415b3&view=att&disp=safe

4x4? If so, transfer case? Miles on unit? Any recent services to coincide?

 

[JWA_Two]

4x4? If so, transfer case? Miles on unit? Any recent services to coincide?

It is 4x4. I haven’t checked the transfer case, the noise seems a bit closer to the front but in that general area.

29,000 miles — I recently purchased it and didn’t notice when buying as it was warmed up etc, doesn’t mean it wasn’t making the noise.

No recent service other than dealership prep for sale with oil and filter change.

 

[BenchTest]

It is 4x4. I haven’t checked the transfer case, the noise seems a bit closer to the front but in that general area.

29,000 miles — I recently purchased it and didn’t notice when buying as it was warmed up etc, doesn’t mean it wasn’t making the noise.

No recent service other than dealership prep for sale with oil and filter change.

Might be worth a look. It's a simple check. Seems pre-delivery inspection should have checked that, but we all know dealerships BS a lot of that documentation to expedite the sale. I can't get the sound clips to open on my end, so I'm a bit limited. I'm rereading your initial post. This is happening sitting idle, in park, as well as while driving?

 

[JWA_Two]

Might be worth a look. It's a simple check. Seems pre-delivery inspection should have checked that, but we all know dealerships BS a lot of that documentation to expedite the sale. I can't get the sound clips to open on my end, so I'm a bit limited. I'm rereading your initial post. This is happening sitting idle, in park, as well as while driving?

Yes, it is happening at all stages of transmission cycle.

Any tips on how to check the transfer case?

 

[BenchTest]

Yes, it is happening at all stages of transmission cycle.

Any tips on how to check the transfer case?

There should be a fill and drain port on the transfer case. Remove the upper (fill) port plug and see if fluid is present. Crack it loose and slowly back it out and if fluid starts to trickle past threads, you'll know there is fluid in there. If nothing trickles out while you're backing the plug out, remove the plug and stick your little finger in the port and see if it comes back with fluid on it. If yes, you're good on the transfer case. If no, you'll have to improvise a "dipstick" of sorts and probe into the case to see how low it is. Hopefully at some point you return with fluid.

 

[JWA_Two]

See if this new audio will open for you

 

[BenchTest]

There should be a fill and drain port on the transfer case. Remove the upper (fill) port plug and see if fluid is present. Crack it loose and slowly back it out and if fluid starts to trickle past threads, you'll know there is fluid in there. If nothing trickles out while you're backing the plug out, remove the plug and stick your little finger in the port and see if it comes back with fluid on it. If yes, you're good on the transfer case. If no, you'll have to improvise a "dipstick" of sorts and probe into the case to see how low it is. Hopefully at some point you return with fluid.

Properly filled, that t-case should have fluid to the bottom of the fill port (some say it should "steady trickle" out when properly filled, plug removed).

 

[BenchTest]

See if this new audio will open for you

It did open, but I'm not picking up anything that sounds like a whine. Sounds like mechanical parts in motion and maybe some injector ticking?

 

[JWA_Two]

It did open, but I'm not picking up anything that sounds like a whine. Sounds like mechanical parts in motion and maybe some injector ticking?

I suppose it is more of a squeaking/squeal noise. I can try to take another sound clip that’s a bit easier to hear it

 

[JWA_Two]

I suppose it is more of a squeaking/squeal noise. I can try to take another sound clip that’s a bit easier to hear it

Okay, took another it’s not as loud right now go figure since I’m trying to record it.

 

[BenchTest]

Picked up the squeak that time. Where on the vehicle are you "aiming" to get that recording? is that inside the engine compartment or near where the trans/engine mate?

 

[JWA_Two]

Picked up the squeak that time. Where on the vehicle are you "aiming" to get that recording? is that inside the engine compartment or near where the trans/engine mate?

Under driver front wheel just past exhaust that bends behind transmission

 

[JWA_Two]

Picked up the squeak that time. Where on the vehicle are you "aiming" to get that recording? is that inside the engine compartment or near where the trans/engine mate?

Under driver front wheel area where exhaust curves behind transmission