briankk Posted February 24, 2014 Share Posted February 24, 2014 What's involved in getting the LSD off a 3.70 diff and on to a 3.90? Link to comment Share on other sites More sharing options...
capn_r Posted February 24, 2014 Share Posted February 24, 2014 http://www.indysworld.com/80s/general/USRM/mick-usrm/lsd-swap/lsdswap.html Link to comment Share on other sites More sharing options...
ruparts Posted February 24, 2014 Share Posted February 24, 2014 hi, my only comment is that it's better to use all the 3.9 diff gears and case, put the 3.9 ring gear on the posi carrier in the same case the 3.9 came in. this is because the pinion depth is already set for that gear set and diff case, and the only setting you would need to do is the backlash, just adjust till clearance is right. switching the gears into the other case you would need to reset the pinion depth, if not done correctly will be trouble for sure. Link to comment Share on other sites More sharing options...
briankk Posted February 27, 2014 Author Share Posted February 27, 2014 Thanks all for the tips, I've bookmarked that video.. Link to comment Share on other sites More sharing options...
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