Here are some photos of the 5MT with an OBX in it, but it doesnt show the orientation of the gears:
As you can see, the axle splines are on the diff itself, as the axles do not clip in, but are attached via compression pins.
Will I need to shim the diff, from side to side, axle to axle? Shimming the bearings I mean?
As you can see in the photo, the bearing looks to be pressed on all the way to the housing.
Will I need new bearing for the axle shafts?
It would be best to replace the carrier bearings, I'm going to use my old ones though.
For non-Subaru people, the front of the transmission is in the right of the picture. The axles come off the tranny directly after the motor:
Your carrier is setup like the R160/R200 if I'm thinking about this correctly. The ring gear is on the driver's side of the carrier, like the rear diff
So, it *should* be the same, and the gears need to be in the same orientation.
How bad would it be to run with the gears turning the wrong way?
The gears will 'slam' into the retainer/washer stack on acceleration, which is most likely the reason people complain about unmodified OBX LSDs obliterating the stock washer stacks.
From KA-T.org [A forum for turbo 240SXs]:
I have been running an OBX diff for about 18 months or so. Initially it works pretty well but after 6 months it wore out and was basically an open diff. At the time I did not have the cash to upgrade, so I took it apart and found the spring washeres inside were all worn, craked, and half of them were in pieces. Not knowing were to find replacement beveled washers, I simply put regular flat washers inside. I added enough washers to make sure their was going to be enough resistance to lock up the diff. Immidiately the diff worked great again.
The RBryant washers are much stronger, but it's only extra insurance. It's much better when the washer stack only sees pressure on engine braking [Like the Quaife unit].
Edited by flatblack280, 21 May 2010 - 09:54 AM.