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Forrester gearbox noise

Posted: Sat Oct 10, 2009 7:31 am
by timbo
Hi all, I have a 99 2.0 litre Forester and it’s been a great car, and have 320K kms on it, but have bearing and then later a clicking noise in the manual gearbox. Have stripped gearbox and found that the centre diff’s rear retaining clip or circlip had come loose and chipped the transfer driven and drive gears as it was consumed buy the gears. I had the gears welded and filed, replaced all suspect bearings, the 4 transfer bearings and the front diff carrier bearings, all others seem OK. Back in the car clicking gone but bearing noise still there, stripped again and rechecked all bearings all OK.
Questions Can the centre diff type 2 cause a bearing noise under load on all conditions? Can any S/H gearbox with 8 bolt bell housing and high/low fit car, box now is SG-TY755XS1AA or only 99 year box? Me, Toyota mechanic. Thanks. Tim

Posted: Mon Oct 12, 2009 7:28 pm
by AlpineRaven
any boxes from 4 or 8 bolt will fit either way - doesnt matter.

Can you tell me more about the noises - does it happen any speed/load etc?
Cheers
AP

Posted: Mon Oct 12, 2009 9:49 pm
by timbo
Hi AP, the four bolt belhousing is different and won't fit the 8 bolt housing, Impreza boxes don't have duel shift included, from 1999 on the centre diff is a diferent design and with different splin setup from earler. The ratio of my box is 4.1
The bearing noise is on load only in all gears and at all speed, it sounds like cluster bearing in convential boxes but in all gears. Hope that helps, thanks Tim

Posted: Tue Oct 13, 2009 9:08 am
by El_Freddo
G'day Tim.

As AP has said, the 8 bolt boxes and the 4 bolt boxes will still mate up to either the 4 or 8 bolt motor. You just use what ever bolt holes are available between the two. While I have not done this I've read about it enough to know it can and has been done...

All you'd need is another 4.1 ratio box to slot in. The dual shift you refer to I'm guessing is the hi and low range. If you're after a box in the interum, a dual range isn't really necessary...

I'm sorry I can't help more with the bearing noise.

All the best with it.

Cheers

Bennie