Whining noise?

[Voodoo_ChildR32]

Most whining I've seen/heard has come from the side bearings in Nissan rear diffs. Mainly the Titan, but I would think any diff can suffer the same issue.
Usually the only way to diagnose is to open the diff and inspect it or take it to a driveline shop.


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[nimblestix]

Most whining I've seen/heard has come from the side bearings in Nissan rear diffs. Mainly the Titan, but I would think any diff can suffer the same issue.
Usually the only way to diagnose is to open the diff and inspect it or take it to a driveline shop.


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I think I will open em up this weekend and look for unnatural wear on the gears.

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[strickaj]

I have the exact same problem with my R32. Does it sound like a straight cut gear box or a supercharger? I replaced the front diff with a quaife ABT and oem bearings. It's still there. I noticed the ring gear looked worn, at the time I didn't have time or money left to find a new one. You can pull the 4wd fuse just to make sure it's its from the front diff, but you already sound pretty sure. Good luck.

[Skym]

On a side note, i have not checked the fluid since filling it after my engine install a few months ago, and i filled it with some penzoil gear oil. I could swap to heavy shock proof but it might be too late.

From what I understand, if used too thick oil for diffhead, it can close the clearances between gears, etc too much and cause whining. Same whine problem if you overshim a diffhead (excessive clunking is the opposite, where there's more play). Check the oil type ??w?? on bottle and compare to factory oil recommendation ??w??.

[nimblestix]

Good idea thanks skim! Maybe ill try using the using the recommended fluids in the diffs and see how that works.