Complete M-21 Muncie 4 Speed Transmission. This is the 26 spline input shaft (clutch spline), 32 spline output shaft (know to some as the "400" output). This is a real nice original M21 that will work well for many  applications such as Chevelle, Camaro, Buick, Pontiac, Corvette, 442 ect. This unit is all original O.E. gears that are in excellent condition. We re-maned this unit totally with new bearings, brass, small parts, thrust washers, bushing, seals, sliding clutch's, forks,  countershaft and bearing retainer. Case, shift cover, midplate and extension housing were all cleaned and renewed with our in house proprietary system. Nice big IN, big OUT, M21 with our 12 month NON ABUSE warranty. SHIFTER SHOWN IS FOR DISPLAY AND NOT INCLUDED WITH THIS UNIT. Shifters are available and can be quoted based on your application data. TOLL FREE 1-877-614-GEAR