Car: 00 v6 STi

Symptom:

Cruise between 110 - 115 kph (gps) - 5th gear or 4th gear 80-90 kph

High pitched whine emitted from driveline - impossible to pin point - disappears under acceleration or on overrun, just there when holding constant speed.

It's too high in pitch to be a wheel bearing........

Loud enough to hear it reverb off concrete freeway dividers - kinda sounds like quiet straight cuts.

Has me stumped!

Originally thought it was a dry CV resonating (one inner had split boot) - changed both front shafts = No change
Changed all driveline fluids = No change
Rims & tyres = No change
Lowering 40 mm + new sway bars = No change
New front disc's and f/r pads = No change

Seems like something is resonating in the driveline....just can't freeekin find it!!

Any Ideas???

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[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

rear diff....symptoms sound exactly the same as mine....

i put mine on a hoist and spun it up and the noise was clear as day from the rear diff

Sorry to hear

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2013 Toyota Hilux 4x4 - Weekender
1991 Mazda MX-5 - Fun

+1 for rear diff..... prob output bearing.... if it is i have a diff in my shed...

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doubt it will fit. different diff ratios.

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deadly treadly

yer thought that after i posted...

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[COLOR="Blue"]If anyone needs T.I.G or M.I.G or small custom fabrication jobs done PM me.[/COLOR]

had it on a hoist and couldn't replicate the noise.....seems everything needs to be under some load to get it to happen.

I thought rear diff issues were a side effct of dccd? (non dccd box here)

Centre diff?

I've heard the v6 sti boxes may have had a thrust bearing issue also?

Not rear diff as it seems to eminate centrally in the car i.e. from the box or front end.

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[CENTER][SIGPIC][/SIGPIC][/CENTER]
[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

mine sounds like the front when driving, how fast were you going on the hoist??

might have to go abit faster....

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2013 Toyota Hilux 4x4 - Weekender
1991 Mazda MX-5 - Fun

Rear diff issues have nothing to do with what type of centre diff you have.

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MY93 Impreza GX 1.8L, 0hp, 0nm

Thought it did if you ran around with the dccd control wound toward the rear wheel bias?

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[CENTER][SIGPIC][/SIGPIC][/CENTER]
[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

rear wheel bias (open) is the default setting.

now if you do heaps of stand still burnouts with your DCCD wound full rear, then i guess you could blame it on the centre!

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MY93 Impreza GX 1.8L, 0hp, 0nm