|
|
5. With the engine at idle speed and the transmission in PARK or NEUTRAL, observe the vibration. Refer to Noise and Vibration Analysis . Repeat this procedure until you obtain the best possible balance. 6. Install the transmission converter cover bolts and the cover. BUSHING AND MATING SHAFT INSPECTION Any of the following bushing conditions require replacement of the bushing and/or housing: Discoloration due to heat distress Misalignment or displacement of bushing as a result of spinning in housing Medium to heavy scoring that can be easily detected with fingernail. Light scoring is a Debris embedded into the bushing lining material Obvious damage, including excessive and uneven wear Excessive polishing. Minor polishing of the bushing is an indication of normal wear and Any of the following conditions require replacement of the bushing's mating shaft: Discoloration due to heat distress Rough surface finish that can be easily detected with finger Obvious shaft abnormalities, including warping or uneven surfaces Obvious damage or cracking VIBRATION IMPORTANT: Proper bushing and corresponding mating shaft inspection should be performed before replacing the bushing, shaft, and in Checks Causes Lug bolts for the Torque Inspect for loose torque converter (1) lug bolts.
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
NOISE AND VIBRATION ANALYSIS A noise or vibration that is noticeable when the vehicle is in motion MAY NOT be the result of If noise or vibration is noticeable in PARK and NEUTRAL with the engine at idle, but is less Vibration may also be caused by a small amount of water inside the converter. Inspect the tires for the following conditions: Uneven wear Imbalance Mixed sizes Mixed radial and bias ply Inspect the suspension components for the following conditions: Input Sun Gear Thrust Washer Inspect for wear or damage. Turbine Shaft Thrust Bearing Inspect for wear or damage. 2-6 and 3-5-R Clutch Hub Inspect the bearing for wear or damage. Output Carrier Assembly (68) Inspect the carrier assembly for damaged pinion Inspect for a worn or damaged center support roller Inspect for damaged thrust bearings (486, 488). Inspect the carrier assembly for damaged output Output Carrier Thrust Bearing Inspect the bearing for wear or damage. Output Shaft Thrust Bearing Inspect the bearing for wear or damage. 1-2-3-4 Clutch Hub Thrust Inspect the bearing for wear or damage. Turbine Shaft Thrust Bearing Inspect the bearing for wear or damage.
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Alignment wear or damage Loose fasteners Driveline damage or wear Inspect the engine and transmission mounts for damage and loose bolts. Inspect the transmission case mounting holes for the following conditions: Missing bolts, nuts, and studs Stripped threads Cracks Inspect the flywheel for the following conditions: Missing or loose bolts Cracks Imbalance Inspect the torque converter for the following conditions: Missing or loose bolts or lugs Missing or loose balance weights Imbalance caused by heat distortion or fluid contamination WHINE/GROWL NOISE THAT CHANGES WITH VEHICLE SPEED Checks Causes 2-6 and 3-5-R Clutch Hub Inspect the bearing for wear or damage. Output Carrier Assembly (68) Inspect the carrier assembly for damaged pinion Inspect for a damaged center support roller bearing Inspect for damaged thrust bearings (486, 488). Inspect for damaged sun gears (487, 489). Inspect the carrier assembly for damaged output Inspect for damaged or stripped splines on the output Output Carrier Thrust Bearing Inspect the bearing for wear or damage.
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
NOISE IN FIRST OR REVERSE GEAR Output Shaft Assembly (70) Inspect for damaged internal gears (495, 497). Inspect the output carrier bushing (498) for damage Output Shaft Thrust Bearing Inspect the bearing for wear or damage. Input Sun Gear Thrust Washer Inspect the washer for wear or damage. Input Sun Gear Thrust Bearing Inspect the bearing for wear or damage. Input Sun Gear (53) Inspect for spline wear or damage. Input Carrier Assembly (52) Inspect the carrier assembly for damaged pinion gears, 1-2-3-4 Clutch Hub Thrust Inspect the bearing for wear or damage. 2-6 and 3-5-R Clutch (with Inspect the output carrier inner sun gear shaft bushings (60 Turbine Shaft Thrust Bearing Inspect the bearing for wear or damage. Fluid Filter Assembly (26) Inspect for damaged or restricted fluid filter assembly Inspect for damaged fluid filter seal assembly (25) or Automatic Transmission Fluid Inspect for worn or damaged seal. Checks Causes Center Support with 2-6 Low Inspect for damaged or worn low and reverse clutch Inspect for damaged low and reverse clutch backing Inspect for damaged low and reverse clutch backing
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
|
|
|