Canada - Drivetrain - Rear End Howling/Growling Noises

Bulletin
TSB3430

Issue Date
August 10, 2010

Market
Canada

Title
REAR AXLE BEARING ABNORMAL NOISE

Component
DRIVELINE

Models
'07-'10 Tundra

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.






APPLICABILITY:






WARRANTY INFORMATION:






PARTS INFORMATION:






REQUIRED TOOLS & EQUIPMENT:

NOTE:
Additional SSTs may be ordered by calling SPX/OTC at 1-800-933-8335.












NOTE:
- A mechanic's stethoscope or similar tool may be used in place of ChassisEAR(TM).
- ChassisEAR(TM) may be ordered by calling Dealer Equipment Services (DES) at 1-866-868-3372.

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 Repair Manual within E-TAS / TIS library:
- Division: Toyota
- Model: Tundra
- Year: 2007/ 2008/ 2009/ 2010
- Service Category: Drivetrain
- Section: Axle/Differential
- Keyword: Axle: Rear Axle Shaft: Removal / Disassembly / Reassembly / Installation"

4. Test drive the vehicle and confirm the noise is eliminated.
5. Re-check rear differential oil level and confirm NO leaks are present.

NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.