Unusual 4x4 Sound - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 03-19-2014, 08:08 PM Thread Starter
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Unusual 4x4 Sound

I have read the threads and may already know the answer, but I'm asking anyway... The '02 PSD in my sig has been making an unusual noise lately when the four-wheel-drive is engaged and the hubs are locked - similar to a hay elevator or an old combine for the farmers on here. Basically it sounds like a dry chain running loosely and/or binding on a sprocket.

In 2-wheel there is no noise whatsoever. I will be servicing my needle bearings soon as preventative maintenance, but i'm wondering if the transfer case could be low on fluid... Either way, once I get my truck back from the shop for an on/off MAP sensor issue, I will be servicing all drive-line fluids anyway but I am curious if this could be indicative of a pending t-case failure. I truly hope not as after spending $3500 on sticks, intake, switch, gauges, WW2 and some other odds and ends, the wife would NOT be impressed if it now needed a t-case.

As a disclaimer, I bought the truck about 3 months ago used and the previous owner did some maintenance, but seemingly only when he couldn't put it off any longer. I bought it knowing it needed work, as the price was at a point I couldn't turn down for a running/driving 4x4 CCB/flatbed dually 7.3/ZF-6dp combo....

Any thoughts?

Bryan TAPS Member

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post #2 of 3 Old 03-23-2014, 05:30 PM
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the transfer case only holds 2 quarts of atf.

takes 5 minutes to drain it and refill it. so that would be a place to start.

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post #3 of 3 Old 03-27-2014, 08:11 PM
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I bet the t case is dry

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