I am needing a new rear diff soon (mine is making noises). I have a MY02 STI with a stock Suretrac diff in the front, a cusco tarmac gear (35/65 split) open diff in the center, and a 2 year old STI helical diff in the rear.

The rear is starting to make noises (I'm pretty sure it's not happy being mostly RWD after two years of driving) this is a street car so I'm looking for something with lower maintenance intervals, and nice slow progressive lock up.

Any suggestions? If I can I may try the torsen again (no aftermarket torsen) and run a thicker fluid, but I'm not sure that will help. I'm considering going back to a suretrac as well, but they are prone to wear. Cusco RS is okay it seems but apparently lots of fluid changes.

Any suggestions?

There is a 3.9 r180 diff at A parts from a sti forester. Who knows what centre it has in it, worth looking at tho

Do you have a link to it? I'm trying to search their website but I can't find it. Thanks!

Call them. They don't list sti parts

Neil, what was that R180 you got Tom? I know he's not going to use it.

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Beaten up old 98 Gen 2 Liberty, 13.0, stock V3 STI running gear.
07 Transit motor home
69 VF & 70 VG Valiants needing full restoration
Yamaha Zooma 50cc rocket hopefully going with the Transit.

Cusco RS centre in the rear is more progressive that the MZ variant, and doesn't require as much maintenance. Would be the way to go? I would be keen to try the RS over the STI 2 way. (decision pending)

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[SIGPIC][/SIGPIC]
Should have bought an STI

are you sure its not a wheel bearing?

I've got a diff from my 2010 Spec C up for sale. Done less than 1 000 km ' s on it. Let me know if interested. I upgraded to Group N diffs

Chris, You have a diff centre with out bearings

I have a sti plated r180 for sale in my sale thread. Its cheap cheap! Just swap out the centers