Improved gearbox rear shell

The utility model relates to the technical field of automobile gearboxes, and discloses an improved gearbox rear shell which comprises a gearbox rear shell body, the outer wall of the gearbox rear shell body is fixedly connected with two screws, the outer walls of the two screws are movably sleeved with L-shaped plates, the rod walls of the screws are in threaded connection with nuts, and the nuts are fixedly connected with the gearbox rear shell body. The outer walls of the two L-shaped plates are jointly and fixedly connected with a protective annular plate, the inner wall of the protective annular plate is fixedly connected with two buffering mechanisms, and the two buffering mechanisms are fixedly connected with an auxiliary cooling mechanism and a filtering mechanism correspondingly. According to the gearbox rear shell, the gearbox rear shell is improved, so that the gearbox rear shell not only has the efficient heat dissipation capacity, but also has the capacity of filtering and removing impurities of