|
|
Content .. 1397 1398 1399 1400 ..
Locking Rear Axle Does Not Lock Locking Rear Axle Locks in Turns Locking Rear Drive Axle Chatters in Turns Noise in Addition to Normal Clutch Engagement SYMPTOMS - REAR DRIVE AXLE Review the system and operation in order to familiarize yourself with the system functions. Refer Rear Axle Noise The proper diagnosis is an important part of rear axle repair. In axle work, one of the most Any gear driven unit, especially an automotive drive axle where the engine torque multiplication Normal axle noise can be described as a slight noise heard only at a certain speed or under Driveline noises may confuse even the best technician. Vehicle noises coming from tires, Visual/Physical Inspection Inspect the system for loose or missing fasteners. Inspect the system for leaking components. Inspect the system for obvious damage or conditions which may cause the symptom. Symptom List Refer to a system diagnostic procedure from the following list in order to diagnose the symptom:
2008 Chevrolet Silverado 1500 2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Rear Drive Axle Noises Noisy in Drive Noisy When Coasting Intermittent Noise Constant Noise Noisy on Turns REAR DRIVE AXLE NOISES Gear Noise Gear noise or whine is audible from 32-89 km/h (20-55 mph) under 4 driving conditions: Drive- Acceleration or heavy pull Road Load-Vehicle driving load or constant speed Float-Using enough throttle to keep the vehicle from driving the engine, the vehicle slows Coast-Throttle is closed and the vehicle is in gear Gear noise most frequently has periods where the noise is more prominent, usually between 48-64 Bearing Noise Faulty bearings produce a rough growl or grating sound, rather than the whine typical of gear Rear Wheel Bearing Noise A rough rear wheel bearing produces a noise which continues with the car coasting at low speed A rough/noisy rear wheel bearing can be heard by spinning the rear wheels by hand and listening Knock at Low Speeds
2008 Chevrolet Silverado 1500 2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
A low speed knock can be caused by a differential case side gear bore that has worn oversize. Backlash Clunk Excessive backlash clunk under acceleration or deacceleration can be caused by any of the Worn differential pinion shaft Worn differential pinion and/or side gear teeth Worn thrust washers Excessive clearance between the side gears and the axle shafts Excessive clearance between differential side gears and the bore in the case Excessive drive pinon and ring gear backlash Inspect, adjust or replace the affected components as necessary. NOISY IN DRIVE Cause Correction DEFINITION: A noise heard during acceleration load. Adjust the pinion to ring gear backlash. Refer to Backlash Worn pinion and ring gear Replace the pinion and the ring gear. Refer to Drive Pinion Worn pinion bearings Replace the pinion bearings. Refer to Drive Pinion Bearings Loose pinion bearings Adjust the pinion bearings preload. Refer to Pinion Depth Excessive pinion end play Adjust the pinion end play. Refer to Pinion Depth
2008 Chevrolet Silverado 1500 2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
NOISY WHEN COASTING INTERMITTENT NOISE Worn differential bearings Replace the differential bearings. Refer to Differential Side Loose differential bearings Adjust the differential bearing preload. Refer to Differential Excessive ring gear runout Replace the ring gear. Refer to Drive Pinion and Ring Gear Drive Pinion and Ring Gear Replacement (10.5 Inch . Low oil level Fill the fluid level to specifications with the proper lubricant. Wrong or poor grade oil Drain and refill the system with the proper lubricant. Refer to Rear Axle Lubricant Replacement (9.5 Inch LD Axle) or Rear Axle Lubricant Replacement (10.5 Inch Axle). Bent axle housing Replace the axle housing. Refer to Rear Axle Housing Checks Action DEFINITION: Noise is audible when slowing down and disappears when driving. Adjust or replace the pinion and the ring gear. Refer to Drive Pinion and ring gear too Adjust the pinion and the ring gear backlash. Refer to
2008 Chevrolet Silverado 1500 2008 Driveline/Axle Rear Drive Axle - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Content .. 1397 1398 1399 1400 ..
|
|
|