For sale is an excellent Winters #8504 quick change gear set with 24 and 31 teeth.  This is set 04 and in a 4.11 ring and pinion rear end this yields a final ratio of 5.32 and in a 4.86 ring and pinion rear this yields a final ratio of 6.27.  This is a 10 spline gear and very nice.  Thanks for looking and as always I combine shipping when possible.