Whine/Growl Noise That Changes with Vehicle Speed. Chevrolet Avalanche

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2008 🢒 Avalanche - 2WD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Whine/Growl Noise That Changes with Vehicle Speed

Checks

Causes

Input Shaft Thrust Bearing Assembly (60)

Inspect the bearing for wear or damage.

Sun Gear Carrier Thrust Bearing Assembl (66)

•	Inspect the carrier assembly for damaged pinion gears, thrust washers, pins, and rollers.

•	Inspect for a damaged center support roller bearing assembly.

•	Inspect for damaged thrust bearings.

•	Inspect for damaged sun gears.

•	Inspect the carrier assembly for damaged output carrier rear sun gear thrust bearing (captured).

•	Inspect for damaged or stripped splines on the output carrier assembly.

Internal Gear Thrust Bearing Assembly (68, 76)

Inspect the bearing for wear or damage.

2WD Output Bushing (25)

•	Inspect for damaged internal gears.

•	Inspect the output carrier bushing for damage or wear.

2-3-4 Clutch Hub Thrust Bearing Assembly (78)

Inspect the bearing for wear or damage.

2-3-4 Clutch Housing Thrust Bearing Assembly (81)

Inspect the washer for wear or damage.

Input Shaft Bushing (203)

Inspect the bushing for wear or damage.

1-3 Clutch Housing Bushing (420)

Inspect the bushing for wear or damage.

Internal Gear Thrust Washer - 3rd Position - Steel (433)

Inspect the carrier assembly for damaged pinion gears, thrust washers, pins, and rollers.

Internal Gear Thrust Bearing Assembly (435)

Inspect the bearing for wear or damage.

Output Shaft Thrust Bearing Assembly (437)

Inspect the output carrier inner sun gear shaft bushings for damage or wear.

2-3-4 Clutch Housing Thrust Bearing Assembly (441)

•	Inspect for damaged or restricted fluid filter assembly.

•	Inspect for damaged fluid filter seal assembly or improper sealing interface (leaks, fluid aeration).

Internal Gear Thrust Washer - 3rd Position - Plastic (459)

Inspect the bearing for wear or damage.