How Loud Is Your Transfer Case In 4HI? - Chevy and GMC Duramax Diesel Forum
11-16 LML Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

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post #1 of 31 (permalink) Old 11-28-2012, 09:57 PM Thread Starter
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How Loud Is Your Transfer Case In 4HI?

Hello brothers.

With the onset of winter I've had the occasion to use four wheel drive the past few weeks. Although one cannot expect a transfer case meant to handle serious torque to be whisper quiet, mine seems to whine a fair amount, especially on coast down. My exhaust is still factory stock (i.e. quiet) which makes any case noises that much easier to hear, but still I find myself wondering if my noise is normal for an HD part, or if something is wrong.

At highway cruise, light throttle, the volume of the transfer case whine on coast down is about 75% as loud as the engine itself. How loud is yours? Is your exhaust stock like mine?

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post #2 of 31 (permalink) Old 11-29-2012, 01:56 AM
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I noticed the same thing yesterday as we got a pretty bad snow fall. I've got a 4" turbo back with 3" downpipe. Mine wasn't too loud just sounded to me like something dragging on the ground. I'm not sure if this is normal or not.

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post #3 of 31 (permalink) Old 11-29-2012, 07:08 AM
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I never noticed it on mine, but I did overfill it with transynd through the speed sensor.

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post #4 of 31 (permalink) Old 11-29-2012, 07:45 AM
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I know there was a thread earlier where there was no oil in the T-Case.

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post #5 of 31 (permalink) Old 11-29-2012, 08:21 AM
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^ that cant be good.

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post #6 of 31 (permalink) Old 11-29-2012, 08:32 AM
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Originally Posted by Alberta Dmax View Post
I know there was a thread earlier where there was no oil in the T-Case.
Several guys have mentioned that...I would check it to make sure, mine didn't whine when stock and I put about 180 miles while in 4wd (offroad tho, maybe not able to hear it) going as fast as 50mph

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post #7 of 31 (permalink) Old 11-29-2012, 09:33 AM
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I drove around in 4HI a lot the past two weekends and I never really noticed any sound coming out of the transfer case. I switched it to 4LO a few times and could barely hear a whine from the T-Case.

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post #8 of 31 (permalink) Old 11-29-2012, 10:15 AM
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Can't hear mine but I'm running MT Baja ATZ tires that mask it. Drove 200mi highway in 4hi by accident recently.
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post #9 of 31 (permalink) Old 11-29-2012, 10:28 AM
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Mine isn't too bad either even I'm four low it's not too loud, I would check your fluid

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post #10 of 31 (permalink) Old 11-29-2012, 03:15 PM
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mines stock and the TC hardly makes any noise. Even on hard pavement at 60mph. No I dont do that often but i did kick it in once on the hiway because I knew you could and just to see how it acted.

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