Member
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Join Date: Apr 2021
Location: SF Bay Area
Posts: 156
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Member
Join Date: Apr 2021
Location: SF Bay Area
Posts: 156
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Rear Diff Gear Whine
About 1.5 years ago, had a shop put nitro 4.88s into my 4R on 33s. Followed break in instructions from the shop and changed the gear fluid as required. Generally change gear fluid every 15k miles. Truck sees trails every month or so but rarely difficult trails.
About a month ago, started noticeable considerable gear whine coming from the rear only when hitting the accelerator. Tested the back lash by wiggling the drive shaft and appears to be lots of play / sloppy backlash. Drained the oil, and the oil was clean but the magnet on the drain plug had lots of caked sludge (too much considering fluid changed in July) as well as small sharp bits stuck to the drain plug magnet. All in all, the truck probably has about 30k miles on the new gears and the whine is now loud enough that you have to talk louder when driving.
Do you guys think the gears were installed improperly or this is normal wear and tear?
Thanks!
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