Muncie 4 Spd Car M21 “Close Ratio” Gear Kit and 7/8" Bearing Rebuild Kit This kit includes all New Gears, Bearings, Seals, Gaskets o-rings, small parts kit that has all the snap rings, washers, needle rollers etc. & High Quality Brand New Synchros, 1-2 3-4 Spring and key kits, input nut, and rear bushing 27 spline. (If you need the spline bushing just let us know at the time of purchase and we can swap it out.) This M21 Gear kit will have a 7/8” Countershaft pin, 10 Spline input, Close Ratio 2.20 1st gear. The kit will include the Input shaft (4th gear), Countershaft, 1st gear, 2nd gear, 3rd gear, and Reverse Idler. Input- 26 Tooth 10 Spline Close Ratio Counter Shaft- R27-22-19-17 Big 7/8" Pin Close Ratio 1st Gear- 36 Tooth 2nd Gear- 30 Tooth 3rd Gear- 27 Tooth Rev Idler- M21 This is an excellent way to convert your old Muncie M21 into a new unit. This comes with everything you need to convert M21 Case with the 7/8” countershaft pin to a like new transmission. These are quality gears we have been selling for the past 20 years; they are a direct replacement for the factory Muncie M21 gears. So if you have an old tired factory Muncie that is damaged, this gear kit will get you on the road again!