Venture AWD V6-3.4L VIN E (2004)
Torque Tube: Customer Interest
Drivetrain - Boom or Drone Noise at 2100 RPM
Bulletin No.: 04-04-17-001B
Date: June 29, 2007
TECHNICAL
Subject:
Boom or Drone Noise at 2100 rpm or About 120 km/h (75 mph) (Inspect and Clean Torque Tube Mount or Install Dampener/Mount Kit)
Models:
2002-2004 Buick Rendezvous AWD
2005 Buick Rendezvous AWD (w/LA1 Only)
2002-2005 Chevrolet Venture AWD
2002-2003 Oldsmobile Silhouette AWD
2002-2005 Pontiac Aztek AWD, Montana AWD
Supercede:
This bulletin is being revised to add a corrective action, one illustration and warranty information. Please discard Corporate Bulletin Number
04-04-17-001A. (Section 04 - Driveline/Axle).
Condition
Some customers may comment on a noise or vibration that can be heard centered at or around 2100 RPM. This usually occurs at about 120 km/h (75
mph) in 4th gear, but the sound may be audible in all gears when at 2100 RPM.
Cause
The central torque tube mount, dampener and bushing may be allowing noise and/or engine vibration to transfer to the body at the mount point.
Correction # 1
ALWAYS inspect and if required perform Correction # 1 BEFORE going on to Correction # 2.
Vehicles that have been operated on dirt roads or in loose dirt may experience a condition called "mud packing". If a large quantity of dirt accumulates
on the center torque-tube mount, noise and/or vibration may be transmitted to the passenger compartment. The illustration above highlights the areas of
concern within the circles. Please inspect and thoroughly clean the areas indicated if required. If a quantity of dirt was found on the mount, please road
test the vehicle and confirm that the boom or drone noise has been corrected. If the noise remains, continue with Correction # 2.
Correction # 2
A kit has been developed that includes a revised torque-tube mount, spacing washer and a new dampener. Use the procedure below to install these
revised parts.
Raise and suitably support the vehicle.
You must support the torque tubes near the central torque tube coupling. Do not let the shafts hang under their own weight.
