Quote Originally Posted by pure_na View Post
i realise i'm stating the obvious, but have you looked into the puddymod diffs...for ideas/comparison or something? they've got very good reputation.

edit: it's about time someone in aus starting looking into s2k diffs. thanks for that. i personally have never had any issues, but if i was planning on modding my car or using it far more...spiritedly...i would want to do something about the diff before anything happened to it, rather than after. in saying that, after reading your article none of the current options you discussed (comptech etc.) caught my attention as much as puddymod's service so you might want to look at that.
Yeah we've had a close look at puddymod. Here's what we've found:
- From what I understand, he uses a comptech reinforced case. That's why I only listed comptech as the case strengthening option.
- The solid pinion spacer is nothing new but certainly works. We offer this mod already for any diff we do - many diff specialists could, too.
- He cryo-treats gears and some other components. We've got reservations about this process. I am not a metallurgist and there's stacks of debate about how good/worthwhile/counter-intuitive this process is, so I'll leave it at that. Thing is, you don't find the same debate around the technology we use, namely shot peening and ISF/REM. The reason for this is there is an enormous body of scientific evidence proving the benefits of both of these processes - not so for cryo treatment.
- He uses black phosphate treatment on the bearing caps. We don't know whether this does anything independently from the other mods.
- He very carefully assembles the diffs to exacting preloads. I honestly think this is where his excellent reputation comes from. He clearly does very good work. We seek to do the same thing.
- He uses new fasteners. Not a bad idea if you want to spend a little extra dough.