#K100. Build your own Level 4 Enforcer transmission. Fits all 4R100 transmissions, 1998 on. You get all Red Eagle clutches and Kolene steels plus all 4 Alto Power Packs. Red Eagle Power Packs and Kolene steels for 1st, 2nd and 3rd, Kryptonite Power Pack and Kolene steels for overdrive. You also get a Transgo Shift Kit, power valve, overdrive spiral snap ring, 45 element sprag, triple clutch torque converter (#3D6 or #3G6) and our 300M input shaft. The 2001 4R100 with the diode one-way clutch will have to be retro fitted with the 50-tooth outer race type sprag, see below (not included). This price includes the overhaul kit, carbon fiber band and filter. Add molded pistons, bearings, thrust washers, solenoid pack, pump and pressure valve if needed.