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Growling and whirring(sp)?

1346 Views 2 Replies 3 Participants Last post by  LUBECAKES
08 4X4 LE.

When letting off the gas from 50ish mph and down the truck is making a growling like sound. Changed the diff oil tonight with no avail.
I did notice when slowing down rapidly that the pitch of the noise will change when the tranny downshifts. Noise dissipates when in neutral.
Any ideas?
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It's the rear axle. You probably need new pinion and/or carrier bearings.
 
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