Drivetrain - Front End Grinding Noise In 4WD

T-SB-0338-09

Rev1

September 16, 2009

Grinding Noise When in 4WD

Service Category
Drivetrain

Section
Axle/Differential

Market
USA





Applicability

March 10, 2010 Rev1:

^ Applicability has been updated to include 2008 - 2010 model year Sequoia vehicles.

^ Production Change Information has been added.

Any previous printed versions of this service bulletin should be discarded.

Introduction

Some 2008 - 2010 model year Sequoia and 2007 - 2010 model year Tundra vehicles may exhibit a grinding noise from the front of the vehicle while in 4WD. An updated differential support bolt is available to address this condition. Follow the repair procedure in this bulletin to inspect and replace the differential support bolt.





Warranty Information

APPLICABLE WARRANTY

^ This repair is covered under the Toyota Comprehensive Warranty. This warranty is in effect for 36 months or 36,000 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.





Production Change Information

This TSB applies to vehicles produced BEFORE the Production Change Effective VINs shown below.





Parts Information





Required Tools & Equipment

Inspection Procedure

1. Test drive the vehicle and confirm the noise is only present in 4WD.

2. Place the vehicle on the lift and remove the left front wheel.





3. Inspect the front differential support bolt for separation.

Repair Procedure

1. If the differential support bolt is separated perform the five steps below.

NOTE
If there is NO damage to the differential support bolt, this TSB does NOT apply. Continue diagnosis to isolate the cause of the condition.

A. Remove the differential support bolt.








Refer to the Technical Information System (TIS) applicable model and model year Repair Manual:

B. Clean the bracket and surrounding area.

C. Install the NEW differential support bolt.





Refer to TIS applicable model and model year Repair Manual:

Torque: 120 N*m (1224 kgf*cm, 89 ft*lbf)





D. Fill the bracket with Loctite 5040 (or equivalent) until sealant can be seen coming out of the bracket opening. Allow sealant to setup for 12 minutes.

E. Inspect surrounding area for damage.

2. Test drive the vehicle to confirm the repair.