Rear axle noise, tire noise and the resolution with the road and tire noise is changed, the rear axle noise is not. When the vehicle speed is below 48km / h, the rear axle noise disappear, but the tire noise will continue to exist. The car is moving and sliding, the tire noise is the same, but the rear axle of the noise is different. Wheel bearings rear axle abnormal sound and noise to distinguish the car is moving and sliding, the front wheel bearing noise constant, such as maintaining constant speed and brake slightly applied, can reduce some of the load wheel bearings, which can weaken the noise, that is noise sources can be found where it comes from. When the speed is greater than 48km / h, unless severely damaged the rear axle, rear wheel bearings under normal circumstances few could hear the noise, the car slide, or neutral, the dehiscence of the rear wheel bearing will have a "rumbling" sound, and erosion The rear wheel bearings are issued a "rustling" sound. Bearing and differential gear bearing cone initiative to distinguish abnormal noise reducer bearings usually produce harsh "rumbling" sound or "quack" sound, the sound the beat steady, with the speed of change. Gear reducer cone bearing sound in the car before the big slide when the latter bearing the larger noise in the driving. Differential bearing noise is usually a constant ear-piercing sound, but it beat than the gear reducer tapered bearings to ease the noise is much more. Rear axle gear noise to distinguish the normal straight line driving, the axle gears and planetary gear differential is almost no relative motion, so can not hear the noise. Car moving process, the rear axle gear occurred mostly because of abnormal sound caused by poor lubrication, resulting in scar reducer gear grind, if the sliding speed in a variety of abnormal sound can be heard, then by the reducer gear nut loosening caused. Low speed, rear axle parts occurred percussion, acceleration or deceleration, especially given the abnormal sound dull. The failure from one or more found the following reasons: ① differential axle differential gear journal and the shell gap inappropriate. ② spline axle differential gear and axle gear keyway backlash properly. ③ differential differential cross shaft journal and the shell of a mismatch. ④ differential cone active and passive gear mesh backlash properly. ⑤ differential axle gear meshing with the planetary gear backlash properly. ⑥ thrust washer wear. Vehicles, the occurrence of abnormal sound due to the rear axle gear mesh gap properly, differential bearing pre-load adjustment added improper or both. Exclude abnormal sound, the need to open checking differential gear reducer gear meshing with the gap, cone reducer gear bearing pre-load and increase exposure to traces of the gear reducer.
