KiNK43 Posted July 14, 2014 Share Posted July 14, 2014 Some y21 have lsd in them. May be worth checkin since box isnoff the car.But S9b Diff won't work in the other boxes. The final gear has a different number of mounting bolts. So ya can't just swap final gear onto lsd.From what be understand the y21 have weak synchros compared to the other boxes too. Mind you there all getting old now so all used boxes are prone to issues. Quote Link to comment Share on other sites More sharing options...
Dougie Posted July 15, 2014 Author Share Posted July 15, 2014 Some y21 have lsd in them. May be worth checkin since box isnoff the car.But S9b Diff won't work in the other boxes. The final gear has a different number of mounting bolts. So ya can't just swap final gear onto lsd.From what be understand the y21 have weak synchros compared to the other boxes too. Mind you there all getting old now so all used boxes are prone to issues. ah that sucks, so an s80 wouldnt have worked anyway? Quote Link to comment Share on other sites More sharing options...
KiNK43 Posted July 15, 2014 Share Posted July 15, 2014 Dunno. The lsds might be similar fit. But only way to put a s9b diff in a non lsd box is to take the final gear and countershaft with it. Quote Link to comment Share on other sites More sharing options...
dr_broon Posted July 15, 2014 Share Posted July 15, 2014 Ah sorry, didn't realise that you meant lsd / non lsd Quote Link to comment Share on other sites More sharing options...
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