tonino Posted November 23, 2010 Share Posted November 23, 2010 hi all i have a 7" sierra diff that is turning in a anoying way ; i rebuilt it using new diff bearings and cages, fit a new trannX lsd, but it's impossible to set the backlash because it has a "hard spot" when i turned it the "main pignon" hasn't been touch, i just re fit the crown on the trannX, but when back lash is around 0.005 , if i make a 180° turn, the diff has no backlash at all and pignion is very hard to turn by hand crown and pignon seem fine, ali casing seems fine too, but something is wrong, as if crown was not flat... can you help me if you manage to understand what i mean!? ps: already done a few diff so far, with no probleme... cheers Link to comment Share on other sites More sharing options...
Rattie Posted November 23, 2010 Share Posted November 23, 2010 Crown wheel runout? That could be runout in the TrannX casing. Have you tried a dial gauge on it? Martyn R300GRR Link to comment Share on other sites More sharing options...
tonino Posted November 23, 2010 Author Share Posted November 23, 2010 yes i do 0.06mm of run out on trannX diff.would be very surprising to see that sort of issue on trannX diff, but worth to be check. ☹️ Link to comment Share on other sites More sharing options...
6speedmanual Posted November 24, 2010 Share Posted November 24, 2010 Can the crown gear be moved to a different rotational position on the diff carrier? Peter BRAWNGP green SUPERLIGHT FCITW 2009 😬 Link to comment Share on other sites More sharing options...
elie boone Posted November 26, 2010 Share Posted November 26, 2010 Maybe there is a slight burr or some dirt has creeped up inbetween the flanges. Link to comment Share on other sites More sharing options...
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