# 04 Ram 2500 with NV271 Grinding/Howling in 4x4

**URL:** <https://community.cartalk.com/t/04-ram-2500-with-nv271-grinding-howling-in-4x4/114254>\
**Category:** Maintenance/Repairs\
**Tags:** transmissions, dodge, ram-2500\
**Created:** [March 23, 2018, 12:19am UTC](https://community.cartalk.com/t/04-ram-2500-with-nv271-grinding-howling-in-4x4/114254 "2018-03-23T00:19:43Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Demonis](https://avatars.discourse-cdn.com/v4/letter/d/6de8d8/32.png) [@Demonis](https://community.cartalk.com/u/Demonis)\
**Post date:** [March 23, 2018, 12:19am UTC](https://community.cartalk.com/t/04-ram-2500-with-nv271-grinding-howling-in-4x4/114254/1 "2018-03-23T00:19:43Z")

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Went to engage my 4-Hi a while back, successfully about 3-4 times due to my rear tires losing traction, during proper use (not dry pavement), then attempted again and got a grinding/howling noise from under my feet. I _immediately_ shifted out of 4-Hi into neutral and the noise _continued_ until I came to a complete stop. I shifted into 2-Hi and the noise was gone. Another test later had the same symptoms.

So far I’ve found it could be (not sure if these are right), U-Joints, some electrical motors responsible for shifting on the transfer case (not applicable to my manual shift case) some motor for locking the front diff (not sure if this is applicable-nothing mentioning it in repair manual), complete and utter failure of the transfer case and/or front diff.

Any help pinpointing the issue is appreciated.

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**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\
**Post date:** [March 23, 2018, 3:38pm UTC](https://community.cartalk.com/t/04-ram-2500-with-nv271-grinding-howling-in-4x4/114254/2 "2018-03-23T15:38:01Z")

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> [@Demonis](#):
>
> help pinpointing the issue

Short of getting under the truck fora good look-see and wiggle, there is nothing I can add to your list from the interwebs other than it sounds like a transfer case problem. Jack it up on all 4s and startit up and engage the 4Hi while a buddy watches and helps listen to pinpoint where the noise occurs - front axle or transfer case. Good Luck