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Ring & Pinion or Transfer Case issue?

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Old Feb 8, 2019 | 08:48 PM
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Bhotrod
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Ring & Pinion or Transfer Case issue?

Not sure if this grinding noise in 4wd on my 2003 F250 is from a bad pinion bearing/ring & pinion or if the t-case is worn out from plowing.......

recommendations?
 
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Old Feb 9, 2019 | 04:51 AM
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Probably the transfer case. When is the last time you check the fluid level in the transfer case?
 
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Old Feb 9, 2019 | 11:45 AM
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I changed the transfer case fluid a year ago and it was really dark but I plowed with the truck last winter and it was good. I drained the fluid a couple days ago and it still looked clean.

The grinding noise is very loud when I let off the accelerator pedal and only in 4wd.
 
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