Rear Diff. whine when on the throttle

[Ldub]

SCZoom...

It sounds like "driveline harmonics". I remember a thread from the "long ago" on this, but can't find it any more...

But it's not uncommon in lifted IFS vehicles. I know that Jack (PB Kid) was talking about it in Moab this spring, and I've been noticing it more lately myself.

I'm not gonna lose any sleep over it, unless it gets worse...

[Anita]

Oh, I know my symptoms are diff than the OP's in that it whines on coasting, OFF the throttle for me. But the most relevant thread I could post this in is over a year old and closed. Service manual lists such a sound at around 55mph, throttle closed as "gear noise"

Many of us have experienced that whine off the throttle and found it was because one of our tires was low on air. Check your tires air pressure. Also, putting on a new tire amidst 3 older tires (even if they are the same size) can cause a whine. It sounds silly but it is the cheapest fix to look into...

[Sprey]

After i lifting mine, i had a bit of a whine and a munted noise coming from the drive shaft.

i greased them up twice in a week, thanks to a nice tutorital on here made it very easy!.

and the noise was gone, and same with a small vibration.

been over a month and the slight vibration returned but no noise.

[Amnesia]

Still have my VX - Still has the whine. I've got 187,000 miles on it and have had a couple of sets of new tires to no avail. I live with it.

Turn the stereo up and the noise goes away.

[Moncha]

Following the VX Workshop Manual

Page 323 Explains Diagnosis - For Rear Differential (Section 4A2-3) Look for Gear noise

Page 339 Explains Gear Tooth Contact Pattern Check and Adjustment (Section 4A2-19) A diagram on page 340 shows the patterns of wear that cause noise.

This may help you or your repair person.