Front Wheel Drive Whining - Speed Related

[jebud]

Hi guys,

I have a whining noise coming from the front of the car when i engage the 4WD, currently running it in 2WD as the noise is that loud.

When i have it in 2WD, the noise disappears..

Obviously speed related, because in neutral, the noise is still there.

Is it a diff / transfer case issue or could it possibly be the CV joints?

Any input is most appreciated...

Adam

[T04GTR]

got any oil in the front diff lol?

[jebud]

Ha,

Yes, i replaced it with redline about 12 months ago, havn't seen any greyish green leaks or pools under my car at all.

I don't expect this stuff would burn up to nothing.

OK, would Unigroup or Award diff and gearboxes be the best option to send the car to in Sydney?

Adam

[R.3.2.G.T.R]

take it to award if u do get it looked at

[Moodles2]

What did you use (if you did) in the transfer case when you changed the fluid out? I've read that when you don't use the genuine Matic D fluid in the transfer case, the clutch packs can be damaged.

[jebud]

I bought 2 bottles from UAS, one was for the gearbox and the other was for the front and back diffs.

I believe the lightweight shockproof was for the gearbox, and the heavy weight shockproof was put into the diffs, but i will check for certain tonight.

Adam

[ZED X]

Can you pinpoint the origin of the noise?

Wouldn't be your front CV's as they would rotate regardless, If its your transfer case then chances are u would hear it quite loudly in cabin.

[GTRPowa]

Yeah I once ran a commodore diff with no fluid. It started whining bad and you could feel the car slowing down and crap.

Once I bothered to put fluid in, and drove it out for a few hundred k's, the whining stopped on accelleration, and only made noice on decell.

Same thing here, but opposite. You're getting the noise on accell to the diff. I'd say you have a little chunk of a tooth missing on a diff gear myself. If that's the case, you can probably drive the noise away over time, just change the fluid to get any shavings out. Thats the lazy way.

From personal experience. Enjoy.

[T04GTR]

when did the noise start?