For sale is a very good Winters #8518 quick change gear set with 23 and 29 teeth.  This is set 18 and in a 4.11 ring and pinion rear end this yields a final ratio of 5.20 and in a 4.86 ring and pinion rear this yields a final ratio of 6.12.  This is a 10 spline gear and very good condition.  Thanks for looking and as always I combine shipping when possible.