For those that have meddled with replacing rear diff's, which are the popular choices?

I know of 2 local STI7s which have replaced the rear diffs with mechanical types (one with the Spec C mechanical diff, and the other with a cusco type RS). However, on high speed sweeping turns approx 80-100kmh, they report a "banging" type noise from the rear diff, while under power.

Could this be a lockup, which results in the "bang" when the torque unwinds itself in the plates? Any similar expereinces?

Cheers.

 

STi v3 rear diff on my Euro calssic car with 6 speed JDM gearbox makes an amazing difference. Can now balance oversteer on the throttle.....rather than under steer

Richard

 

Richard, whats your complete differential setup? Was the STI V3 rear diff a mechanical plate-type? And the STI 6 Speed box with the viscous center diff?

 

Standard STi v3 plated diff, standard JDM 6MT centre. Not sure on the front diff - it doesn't 'feel' like a SureTrac, but I haven't been on track with it yet.

Richard

 

Interesting thread this.
I have a hill climb Stiv3, and have change the whole trans to an early RA with 4.11 diffs. My sti trans has 4.44, but I do not think it has a plated rear, just a viscous. Didn't the Sti RA's only have the plated type?
Anyway, have you found the 6 speed sti box good with the 8000 rpm Sti engine? What diff ratio's do the 6speeders have?
I do not expect the RA trans to last the season coming with slick tyres, and i think I will go for the 6 speed sti box.
Any thoughts?

Apart from the ratio's, the ealy RA diff (1994) and the 1996 Facelift sti diff are exactly the same in appearance and feel.