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Noisy in Drive

WARNING: This page is about a different car, the 2009 GMC Sierra, 2009 GMC Cab & Chassis Sierra, 2009 Chevrolet Silverado, and 2009 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Checks Action
Excessive pinion to ring gear backlash Adjust the pinion to ring gear backlash. Refer to Backlash Inspection and Adjustment .
Worn pinion and ring gear Replace the pinion and the ring gear. Perform the following procedures:
  1. Differential Carrier Assembly Disassemble (9.25 Inch Axle) 
  2. Front Differential Case Disassemble (9.25 Inch Axle)  or Front Differential Case Disassemble (8.25 Inch Axle) 
  3. Front Differential Case Assemble (9.25 Inch Axle)  or Front Differential Case Assemble (8.25 Inch Axle) 
  4. Front Differential Drive Pinion Gear Bearing Cup Installation (8.25 Inch Axle w/J 45858)  or Front Differential Drive Pinion Gear Bearing Cup Installation (8.25/9.25 Inch Axles w/J 36598)  or Front Differential Drive Pinion Gear Bearing Cup Installation (9.25 Inch Axle w/J 45754) 
  5. Differential Carrier Assembly Assemble (9.25 Inch Axle)  or Differential Carrier Assembly Assemble (8.25 Inch Axle Lock Ring Style) 
Worn pinion bearings Replace the pinion bearings. Perform the following procedures:
  1. Differential Carrier Assembly Disassemble (9.25 Inch Axle) 
  2. Front Differential Drive Pinion Gear Bearing Cup Installation (8.25 Inch Axle w/J 45858)  or Front Differential Drive Pinion Gear Bearing Cup Installation (8.25/9.25 Inch Axles w/J 36598)  or Front Differential Drive Pinion Gear Bearing Cup Installation (9.25 Inch Axle w/J 45754) 
  3. Differential Carrier Assembly Assemble (9.25 Inch Axle)  or Differential Carrier Assembly Assemble (8.25 Inch Axle Lock Ring Style) 
Loose pinion bearings Adjust the pinion bearings preload. Perform the following procedures:
  1. Differential Carrier Assembly Disassemble (9.25 Inch Axle) 
  2. Differential Carrier Assembly Assemble (9.25 Inch Axle)  or Differential Carrier Assembly Assemble (8.25 Inch Axle Lock Ring Style) 
  3. Backlash Inspection and Adjustment 
Excessive pinion end play Adjust the pinion end play. Refer to Differential Carrier Assembly Assemble (9.25 Inch Axle)  or Differential Carrier Assembly Assemble (8.25 Inch Axle Lock Ring Style) .
Worn differential bearings Replace the differential bearings. Perform the following procedures:
  1. Differential Carrier Assembly Disassemble (9.25 Inch Axle) 
  2. Front Differential Case Disassemble (9.25 Inch Axle)  or Front Differential Case Disassemble (8.25 Inch Axle) 
  3. Front Differential Case Assemble (9.25 Inch Axle)  or Front Differential Case Assemble (8.25 Inch Axle) 
  4. Differential Carrier Assembly Assemble (9.25 Inch Axle)  or Differential Carrier Assembly Assemble (8.25 Inch Axle Lock Ring Style) 
Loose differential bearings Adjust the differential bearing preload. Perform the following procedures:
  1. Differential Carrier Assembly Disassemble (9.25 Inch Axle) 
  2. Differential Carrier Assembly Assemble (9.25 Inch Axle)  or Differential Carrier Assembly Assemble (8.25 Inch Axle Lock Ring Style) 
Excessive ring gear runout Replace the ring gear. Perform the following procedures:
  1. Differential Carrier Assembly Disassemble (9.25 Inch Axle) 
  2. Differential Carrier Assembly Assemble (9.25 Inch Axle)  or Differential Carrier Assembly Assemble (8.25 Inch Axle Lock Ring Style) 
Low oil level Fill the fluid level to specifications with the proper lubricant. Refer to Front Axle Lubricant Level Inspection (9.25 Inch Axle) .
Wrong or poor grade oil Drain and refill the system with the proper lubricant. Refer to Front Axle Lubricant Replacement .
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