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T-SB-0121-08
June 30, 2008
Front Differential Growl/Howl/Rumble Noise at 15-30 MPH
| Service Category | Drivetrain | ||
|---|---|---|---|
| Section | Axle/Differential | Market | USA |
Applicability
| YEAR(S) | MODEL(S) | ADDITIONAL INFORMATION |
|---|---|---|
| 2007 – 2008 | Tundra | Body Type(s): Double CabCrew Max, Regular Cab, Drive Type(s): 4WD Engine(s): 2UZ, 3UR Transmission(s): 5AT, 6AT VDS(s): BT541, BT581, BV541, BV581, CT541, CV541, DT541, DT581, DV541, DV581, KT521, KV521, MT521, MV521 |
Introduction
Some owners of 4WD equipped 2007 or 2008 model year Tundra trucks may complain about a cyclic noise heard from the front of the vehicle between 15 and 30 mph ONLY when driving in 2WD. This noise can be described as a howl, growl, grind, or drone noise. Production changes have been implemented to help prevent this noise. Follow the repair procedure below to address customer concerns.
Warranty Information
| OP CODE | DESCRIPTION | TIME | OFP | T1 | T2 |
| TC8008 | R & R Front Differential Carrier Assembly and Inspection of Front Axles | 4.2 | 41110-34### | 91 | 19 |
APPLICABLE WARRANTY
|
Parts Information
| ENGINE | TOWING PACKAGE | FINAL GEAR RATIO | PREVIOUS PART NUMBER | CURRENT PART NUMBER | PART NAME | QTY |
|---|---|---|---|---|---|---|
| 2UZ-FE | No | 3.909 | 41110-34481 | 41110-34482 | Front Differential Carrier Assembly | 1 |
| Yes | 4.100 | 41110-34491 | 41110-34492 | 1 | ||
| 3UR-FE | Yes | 4.300 | 41110-34502 | Same | 1 | |
| – | – | – | – | 43425-0C010 | Ring, Shaft Snap
(for Front Drive Inner Shaft Outer) | 2 |
| – | – | – | – | 95381-04050 | Cotter Pins
(for Front Axle Shaft Lock Nut) | 2 |
| – | – | – | – | 90252-04003 | Cotter pins (for Tie Rod End Lock Nut) | 2 |
| – | – | – | – | 95381-03225 | Cotter Pins (for Lower Ball Joint) | 2 |
| REQUIRED MATERIAL | QUANTITY |
Toyota Genuine Differential Gear Oil LT 75W-85 GL-5 | 2.05 – 2.15 liters (2.17 – 2.27 qts) |
Required Tools & Equipment
| SPECIAL SERVICE TOOLS (SST’S) | PART NUMBER | QTY |
| Drive Shaft Remover Attachment* | 09520-01010-02 | 1 |
| Differential Side Gear Shaft Tool (Attachment, Shocker Set) | 09520-24010
(09520-04010, 09521-32040) | 1 |
| 39 mm Socket* | 00002-00039 | 1 |
* Essential SST.
| NOTE
Additional SSTs may be ordered by calling SPX/OTC at 1-800-933-8335. |
| REQUIRED EQUIPMENT | SUPPLIER | PART NUMBER | QTY |
|---|---|---|---|
| ChassisEAR (or Equivalent) | ADE | JSPSM06606 (JS Products) | 1 |
| NOTE
• A mechanic’s stethoscope or similar tool may be used in place of ChassisEAR. • ChassisEAR may be ordered by calling Toyota 1-800-368-6787. |
Repair Procedure
- Test drive the vehicle to confirm the customer complaint.
Is the condition present below 30 mph?
- YES — Go to step 2.
- NO — This TSB does NOT apply.
- Does the noise go away or is it significantly reduced when driving in 4WD?
- YES — Go to step 4.
- NO — Go to step 3.
- Install ChassisEAR (or equivalent) on the vehicle and attempt to isolate the source of the noise in 2WD.
Is the noise loudest near the front differential assembly?
- YES — This TSB applies. Go to step 4.
- NO — This TSB does NOT apply. Continue diagnosis to isolate the source of this noise.
- Remove the front differential carrier assembly.
Refer to the Technical Information System (TIS), 2007 or 2008 model year Tundra Repair Manual: 2007 or 2008 Tundra, Drivetrain – Axle/Differential – “Differential: Front Differential Carrier Assembly (for 4WD): Removal”
- Examine both front axle assemblies for unusual wear.
Do the axles display any unusual wear where they are inserted into the front differential carrier assembly?
Figure 1.
- Install the NEW front differential carrier assembly.
Refer to TIS, 2007 or 2008 model year Tundra Repair Manual:
2007 or 2008 Tundra, Drivetrain – Axle/Differential – “Differential: Front Differential Carrier Assembly (for 4WD): Installation”
- Test drive the vehicle and confirm the noise is eliminated.
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