Automobile speed changer

The utility model provides an automobile speed changer, include: left side casing, input shaft, right casing, left casing, right casing are together fixed in opposite directions, the input shaft passes through the bearing and supports on left casing and right casing, and the jackshaft passes through the jackshaft bearing and supports on left casing and right casing, and the differential mechanism shell passes through the differential mechanism bearing and supports on left casing and right casing, the centre of input shaft is passed through the internal spline and is connected with the external splines of motor output shaft, be equipped with input shaft gear on the input shaft, be equipped with jackshaft gear, jackshaft driven gear on the jackshaft in proper order, wherein input gear and the passive tooth of jackshaft meshing, the jackshaft gear subtracts gear engagement through the fixed screw with owner on the differential mechanism. The utility model discloses with differential, speed reduction integrated d