moderatePro shop 6–12 hours (shop) Community experience760 views
Source: Widely reported by owners. Not a GM statement. Confirm with a qualified technician.
When to stop driving
Stop driving if the noise turns into heavy vibration, grinding, or a clunk followed by loss of drive.
Symptoms
- Rumble or rattle from under the center of the car
- Noise at idle that changes with engine speed
- Vibration felt through the floor or console
- Noise that goes away when the clutch is pressed (manual cars)
Likely causes
- Worn torque tube support bearings
- Rubber bearing mounts breaking down
- Driveshaft coupler wear
What to check
Diagnostic steps, in order. Stop if any step needs tools or skills you don't have.
- 1Note when the noise happens: idle, specific RPM, in gear or in neutral.
- 2On a manual, check if pressing the clutch changes the noise.
- 3Have a shop use a stethoscope or chassis ears to pinpoint the noise source.
- 4Rule out exhaust heat shields, transaxle and clutch issues first.
Possible solutions
- Rebuild the torque tube with new bearings
- Replace the torque tube assembly
- Replace couplers if worn
Parts commonly needed
- Torque tube bearings or rebuild kit
- Couplers
- Rebuilt torque tube (alternative)
Warning signs
- Noise getting louder
- New vibration through the console
- Rattle that appears in a narrow RPM band
Prevention
- Address noises early
- Avoid hard launches that stress the driveline
- Have the driveline inspected whenever the transaxle or clutch is serviced
Information here combines factory data and owner experience and may not apply to your exact car. For brakes, steering, suspension, fuel or anything safety-critical, consult a qualified mechanic. Read the full disclaimer.
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