Whine

[taylor]

Hi all. Got a bit of a problem.

Not long after fitting my new wheels I noticed that on decelleration I get a loud whine from what seems like the front of the car. And sometimes there seems to be a bit of a whine when I am accellerating.

I dropped the fluid in the Xfer case on sat, seemed a bit grey, but ran clear out the drain hole, but replaced it with new fluid anyway, no change.

Im going to change my wheels back to the factory rims but I dont think they will make a differnce as they are all the same size.

Any input appreciated

Manual Trans

Taylor

[Turbo_Steve]

Er......is the tyre fouling the wheelarch?

[taylor]

Where is i likely to be rubbing? i have fitted 18*7.5 with 215/45/18 tyres.

[taylor]

and does it in a strait line

[Turbo_Steve]

Best thing to do is have a good look all round the front arches.

I've seen cars with wheels that SHOULD fit foul because they've had a minor knock at some point that has very very slightly deformed the arch shape.


it does rather sound like rubbing.

[scott.mohekey]

It could just be new rubber noise?

You say when decelerating, is this with the brakes applied? Or even with throttle off?

[Adam.Findlay]

take one of either scott kayne or i for a drive so we can offer our opinion mate

[bradc]

What is the offset on the wheels? Also pics of the car wouldn't go astray just to confirm the suspension is where it should be.

[AlanDITD]

mine did this with the RX8 wheels, the inner tyre will be catching the top arm, fecking annoying noise it is

[mattnz]

Stick some bits of light coloured insulation tape on places it might rub and take it for a drive, then check the tape afterwards :)

[taylor]

brad 38mm.

Scott. no no throttle. just letting it coast back down. as soon as i apply just a wee bit of throttle the noise goes away. which is what makes me think its mechanical.

I have had all fours off and cant see any signs of rubbing.

im thinking wheel bearing or gbox or xfer case.

the sound does sound a bit like metal on metal

[wintertidenz]

If the whine gets worse when you increase your speed, and it goes away when accelerator is pushed, then it's the transfer case.

Wheel bearing is more a rumbling noise.

[bradc]

Pics to see how they sit? Reason I'm asking is that 215/45/18 is quite a bit taller than stock which is 205/55/16

[Turbo_Steve]

If it's mechanical then it's transfer case or CV joint....though I am a total believer in looking at what you changed last as a root cause - and tyre rubbing still sounds like a good candidate to me: it's definitely where I'd be looking first.

[AlanDITD]

If the whine gets worse when you increase your speed, and it goes away when accelerator is pushed, then it's the transfer case.

Wheel bearing is more a rumbling noise.

or its the wheel catching the top arm :)

[taylor]

ok il swap wheels tomrrow and report back gents

[taylor]

Wheels swapped over this morning, noise was stil there but alot harder to hear, due to the road noise of the old tires. probably why I havnt noticed it until now.

So general consensus is the transfer case? or is there a possibility it could be the gearbox?

[scott.mohekey]

Brake pads/discs? Axles/cvs? tire noise coming through worn bushes? etc etc

[chugg]

Mine has a similar whine to what you describe (mine is Tip tho not man) not really bad but you can hear it when the stereo is off, and my thoughts are xfer case. Changed oil for Amsoil but still seems to do it (bit quieter when warmed up).
Searching the forums it seems quite common to whine without leading to failiures, it's just a bit annoying.
I know additives are a bit frowned upon, but does anyone know of anything reliable that could be added to quieten it without compromising the oil?

[andrew38]

Does the whine increase with revs and decline when it changes up and get quieter as the box warms up?

I have been told by a gearbox specialist who knows the Invecs box well that there is a filter inside the box this gets blocked over time and causes the box pressure to lower which in turn causes the pump inside the box to whine. There is no way to clear the filter apart from opening up the box, if the blockage gets too bad the lack of pressure will cause the clutch packs to slip and burn out.

[scott.mohekey]

Taylor stopped by my place last night to pick up an engine mount. As he pulled up there was a loud clunk noise. Turns out it was his ayc.

[taylor]

Yep, Went and saw adam and to see what he thought. After hanging himself halfway out the window down blenheim road he said "dude thats definatly coming from the back"

Chucked her up on stands and you could her it when you spun the rear wheels. had a look at the diff. oil everywhere, all over exhaust and subframe.

[chugg]

Searching the forums it seems quite common to whine without leading to failiures, it's just a bit annoying.


:uhoh:

[Adam.Findlay]

Yip when she was up on stands we jumped under and there was metal gritty oil coming out of the bevel gearset side of the diff (passenger output side)
tyre rub my ass haha
sucks for you taylor hope you can get it sorted asap, maby a LSD :)

[wintertidenz]

What are you guys in Chch doing to your AYC diffs?! First you Adam, then Taylor... :P

[scott.mohekey]

Mine is fine. Though I have an auto. Am I correct in spotting a pattern of manual's destroying ayc? Has anyone with an auto ever killed one?

[bradc]

Yes, quite a few people with auto's have killed theirs.

[scott.mohekey]

Links to examples?

[taylor]

just an update guys. dropped the fluid out both parts of the diff. gear part was metallicy, but no actual bits of metal came out.

Then i took the bung out of the ayc side and clunk clunk clunck as bits of metal fell out. and further more when i took the inspection plate off.

so does that mean the ayc side of things is shagged???

[Ryan]

Yes, quite a few people with auto's have killed theirs.

Through excessive power, unkind driving or bad luck?

[taylor]

What are you guys in Chch doing to your AYC diffs?! First you Adam, then Taylor... :P

I think its because me and adam are both a bit younger and tend to drive our cars a bit harder. And maybe give the rear diff a bit more sh1t, Especially in the wet hahaha /rally

[bradc]

Ryan - due to weak design

Taylor - new diff time

[taylor]

Brad the reason I ask is because I Know someone with a diff which has a rooted gear parts but good ayc, just thought if my ayc was screwed, we could make 1 good 1 from the 2.

[bradc]

Might be able to, pull it all apart and see what you end up with

[Adam.Findlay]

yeah manuals must put more shock through the diff. from the ability to launch blah blah. haha. must be why manuals get fecked diffs quicker. haha week i have a cast iron diff now so that aint gna break

[elnevio]

Links to examples?
Me me me! (http://www.clubvr4.com/forum/showthread.php?t=44954)

[scott.mohekey]

Ah, that's right Nev. I forgot about yours.

[Turbo_Steve]

Breaking the diff with an auto seems to be connected with "launching", which really isn't a very good idea.



tyre rub my ass haha

Well, I'll try, but I'd imagine it'll give you a nasty rash.

[taylor]

Adam: "hey isnt that gear oil that came out of the ayc part?"
Me: after a good sniff: "yep"

So, wrong fluid in ayc... probably what killed it. Wonder if I can hit up the people who serviced it last...

unless the fluids have somehow mixed? Is that common? but will it still maintain the consistancy, smell and look of gear oil?

[wintertidenz]

Was it purely the colour of gear oil, or did it have some red in it? That would be the best sign of what's happened.

[taylor]

No Red What so ever.

[bradc]

Quite often the casing splits internally and the AYC fluid is pushed under pressure (that is what the AYC pump does of course) into the gear oil part. It can't happen the other way as there is no pressure generated in the gear part.