240sx Rear end making weird sound

[jaymatic]

Car: 1998 Nissan 240sx 5 speed (swapped), stock VLSD

I've had this weird problem where when i accelerate and decelerate anywhere from 2500-3000 rpms, it makes this whirring (shhh-shhh) sound. And yes i searched it up but i just wanna make sure what the exact problem was, and what you guys think it is.

To sum up everything i did so far:
The car is jacked up rn, took out the diff, took out the guts in the diff, removed axles (doing 5 bolt 180sx conversion and bought a better conditioned vlsd), checked if the bearings on the carrier are damaged which are not, checked if the teeth has any damage but doesn't. So, i'm assuming that the pinion bearings are bad (also searched this up). But my dumbass removed the diff before checking if there's any movement on the yoke that connects to diff, which is why i'm not 100% positive that the pinion bearings are bad. I don't want to take the chance and just drop the new VLSD back in my pumpkin, cause i'd have to drop the whole thing again lol.

So basically, my only lead is that the pinion bearings are bad. I'll try to disconnect it when i get home, since i'm at work. Please feel free to comment what you think is the problem. Thanks!!

[that1guywithans13]

Sure your not mistaking it for a clutch throw out bearing going bad? Tends to make sounds like that that come and go. Usually when something is up with the diff the sound is constant. I have a worn throw out bearing on mine and it whines around the same rpm when I let off the throttle and let it slow down. It goes away sometimes when I hit the brakes

[jaymatic]

The sound is very constant. It's not really a whine, it's more of a rattling sound. It doesn't matter if i apply/let off the gas, brake, or press the clutch in, it'll still make the sound haha. I usually don't hear it when i'm in 4th or 5th gear. However, it's super loud in reverse, 1st, 2nd and 3rd from 2k-3K+ rpms.