Drivetrain - Rear Differential Whine at 50-60 MPH
T-SB-0057-13April 26, 2013
Rear Differential Whine Noise at 50 - 60 MPH
Service Category
Drivetrain
Section
Axle/Differential
Market
USA
Applicability
Introduction
Some 2005 - 2013 model year Tacoma vehicles equipped with a 5 speed automatic transmission may exhibit a whine noise from the rear differential between 50 - 60 mph (80 - 97 km/h). Use the following repair procedure to address this condition.
This bulletin does NOT apply to Limited Slip Differential (LSD) or locking type rear differentials. Warranty Information
Parts Information
Required Tools & Equipment
Repair Procedure
1. Confirm the condition.
Is there a whine type noise present between 50 - 60 mph (80 - 97 km/h) with light acceleration or on deceleration?
^ YES - Continue to step 2.
^ NO - This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
2. Confirm the rear differential fluid level is correct. Is the fluid level correct?
^ YES - Continue to step 3.
^ NO - Check for leaks adjust fluid level and re-test. If whine noise is still present proceed to step 3.
3. Using ChassisEAR(TM) confirm the noise is loudest from the rear differential assembly. Is the noise loudest from the rear differential assembly?
^ YES - Continue to step 4.
^ NO - This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
4. Replace the rear differential assembly.
Refer to the Technical Information System (TIS) applicable model and model year Repair Manual:
5. Test drive the vehicle and confirm the repair.