AWD whine on acceleration

Hi there, we've just inherited an 03 Magna AWD and after just a day of driving I love it to bits. Such an easy car to drive and is so quick at the lights when needed.

As with all older cars it has some problems and niggles that we'll get the local mech to have a look at, but the rear diff (I assume) is making a ripper whine on acceleration and cruising at around 60kph. Go up a long hill at 30-65 and it looks like people outside can hear it. Strangely enough, once you're over 65 then it quietens down again and is usually ok at 80.

Apparently it's been looked at in the past with a shrug and 'it is what it is'. If anyone's got a better idea of what it is and a potential fix, it'd be much appreciated! Cheers.

From what I hear(or actually, don't hear) the AWD driveline is considered to be quite robust, some parts being adopted from the EVO rally cars.

My TL AWD at 195,000km is rather quiet - rear differential included.

I wish I could offer more help, but in this instance, I have not experienced the noise that you refer to.

The driveline on my car has recently had all fluids changed, including having the genuine Mitsubishi special fluid added to the rear diff.

The only remark by the mechanic performing the operation - Brendan at MitsFix, was that my rear diff was slightly "clunky".

Possibly your rear diff might need a dose of DiaQueen supplement.

They are about $45 for a small bottle.

Here is confirmation from another thread:

Quote:

Just a quick note. Mitsubishi recommend with the rear LSD that you add their LSD additive.

It is called Mitsubishi Friction Modifier for LSD Oil.
Part No. MB664682.

Its not cheap. The bottle is 100ml and cost around $40. But you only use 50ml per oil change.

May be worth adding first before you put in your new oil so you dont spill it.

Its not for the centre diff, just the REAR diff.

https://www.aussiemagna.com/forums/sh...=1#post1407631

NOTE: This additive MAY NOT solve your particular problem, but according to what I have read, it should be added to the rear diff.

POSSIBLY, whoever last serviced the car did not use this additive, and the damage has now been done.

I would ring forum sponsor MitsFix for advice.

1300 300 274

https://www.aussiemagna.com/forums/sh...d.php?t=107044

P.S. Since joining AMC almost 5 years ago, this is the first time I have noted that any AWD owner has mentioned rear diff whine.

Thanks for the info Leadfoot, I'll get in touch with them and see what they think.

The car's done a lot of kays and a lot of towing so I'm not surprised this might be rare!

Cheers

Let us know what happens in the future.

I hope that any remedial action is not too expensive.