| Rumbling noise from the rear of the vehicle varying at different vehicle speed and load |
- Rear differential internal failure
- Road noise
- Worn or damaged driveshaft joint
- Wheel bearing
- Another component contacting the front/rear drive halfshaft
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- Using the manufacturer approved diagnostic system run application Noise, vibration and harshness diagnostic test - Rear differential
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| Noise is at constant tone over a narrow vehicle speed range. Usually heard on light drive and coast conditions |
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| Noise is the same on drive or coast |
- Road noise
- Worn or damaged driveshaft joint
- Driveshaft center bearing
- Wheel bearing
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- Normal condition (road noise)
- Check and install new components a required.
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| Noise is produced with the vehicle stationary and when driving |
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| Loud clunk in the driveline when shifting from reverse to forward |
- Transmission calibration
- Transmission Mount
- Transmission
- Suspension components
- Backlash in the driveline
- Engine idle speed set too high
- Engine mount
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- Using the manufacturer approved diagnostic system, re-configure the Transmission Control Module (TCM) with the latest available calibration
- Inspect and install new transmission mounts as required
- For transmission diagnostics. Refer to: DIAGNOSTICS - VEHICLES WITH: 9HP48 9-SPEED AUTOMATIC TRANSMISSION - AWD
- Inspect and install new suspension components as required
- Inspect and install new driveline components as required
- Check and adjust the idle speed as required
- Inspect and install new engine mounts as required
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| Clicking, popping, or grinding noises |
- Inadequate or contaminated lubrication in the front/rear drive halfshaft constant velocity (CV) joint
- Another component contacting the front/rear drive halfshaft
- Wheel bearings, brakes or suspension components
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- Inspect, clean and lubricate with new grease as required
- Ensure all other components are clear from front/rear drive halfshaft
- Inspect and install new components as required
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| Vibration at highway speeds |
- Out of balance wheel(s) or tire(s)
- Driveshaft misaligned/out of balance
- Driveshaft center bearing touching body mounting point
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- Balance and install new wheel(s) and tire(s) as required.
- Check driveshaft alignment. Check driveshaft balance using manufacturer approved diagnostic system
- Check driveshaft alignment
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| Shudder, Vibration During Acceleration |
- Powertrain/driveline misalignment
- High constant velocity (CV) joint operating angles caused by incorrect ride height
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- Check for powertrain/driveline misalignment and rectify as required. Install new components as required
- Check the ride height and verify the correct spring rate. Install new components as required
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| Lubricant Leak |
- Rear drive axle breather
- Damaged seal
- Rear drive axle filler plug
- Rear drive axle cover/active on-demand coupling joint
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- Check oil level and correct as necessary
- Install new driveshaft/pinion seal as required
- Check and install new filler plug as required
- Re-seal leaking joints as required
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