Mainshaft and fifth gear, both new and retrofit, for transmissions for land vehicles; automotive power train components, namely, the following; transmission shafts; transmission gears; transmission parts, namely, synchronizer rings, synchronizers, thrust washers, bearings, gaskets, and shift forks; manual and automatic transmissions for trucks and automobiles; transmission service kits comprised primarily of shafts, gears, synchronizer rings, synchronizers, bearings, seals, snap rings, thrust washers, pinions, shift forks, sprockets, valves, gaskets, shims, instructions, special tools, adhesives, and sealants; transfer case parts, namely, gears, chains, sprockets, bearings, seals, gaskets, and shafts; transfer case service kits comprised primarily of gaskets, seals, chains, bearings, snap rings, synchronizers, shims, instructions, special tools, adhesives, and sealants; transfer cases for 4x4 and all-wheel drive vehicles; propeller shaft parts, namely, universal joints, constant velocity centering joints, slip stubs, yokes, dust boots, and center bearings; propeller shaft service kits comprised primarily of universal joints, center bearings, yokes, boots, clamps, constant velocity joints, instructions, lubricants, and special tools; propeller shafts; front and rear propeller shafts for trucks and automobiles; axle parts, namely, gears, bearings, shafts, shims, bolts, pinions, yokes, seals, and hubs; axle service kits comprised primarily of gears, bearings, shims, seals, bolts, instructions, and sealants; axle assemblies for trucks and automobiles; clutch parts, namely, clutch covers, clutch discs, and clutch bearings; clutch service kits comprised primarily of clutch covers, clutch discs, clutch bearings, special tools, instructions and adhesives; and power transfer clutches for trucks and automobiles; gasoline and diesel engines for trucks