Drivetrian - Rear End Howling/Growling Noises
T-SB-0151-10June11, 2010
Rear Axle Bearing Abnormal Noise
Service Category
Drivetrain
Section
Axle/Differential
Market
USA
Applicability
Introduction
Some 2007 - 2010 model year Tundra vehicles may exhibit a howling or growling noise from the rear of the vehicle that increases with vehicle speed. Changes have been made to the rear axle bearing to correct this condition. Follow the procedure in the bulletin to address customer concerns.
Warranty Information
APPLICABLE WARRANTY
^ This repair is covered under the Toyota Powertrain Warranty. This warranty is in effect for 60 months or 60,000 miles, whichever occurs first, from the vehicle's in-service date.
^ Warranty application is limited to occurrence of the specified condition described in this bulletin.
Parts Information
Required Tools & Equipment
Repair Procedure Overview
^ Confirm noise is coming from the rear of the vehicle and changes with vehicle speed.
^ Install ChaSSiSEAR(TM) (or equivalent) and isolate the noise to the rear wheel bearing.
^ Remove the rear axle shaft assembly.
^ Install new rear wheel bearing brake caliper bracket and seals.
^ Reinstall rear axle shaft assembly and confirm the noise is no longer present.
Repair Procedure
1. Test drive the vehicle and confirm the customer complaint.
Does the noise increase and decrease with vehicle speed?
^ YES - Go to step 2.
^ NO - This TSB does NOT apply. Refer to the Repair Manual for further diagnosis.
2. Install ChaSSiSEAR(TM) on the vehicle and attempt to isolate the source of the noise. Is the noise loudest near the rear wheel bearing assembly?
^ YES - Go to step 3.
^ NO - This TSB does NOT apply. Continue diagnosis to isolate the source of the noise.
3. Replace the rear wheel bearing caliper bracket and related parts.
Refer to the Technical Information System (TIS) applicable model year Repair Manual:
4. Test drive the vehicle and confirm the noise is eliminated.
5. Re-check rear differential oil level and confirm NO leaks are present.