T-SB-0075-23

October 5, 2023

Cyclic Growl/Groan Noise from Front Differential
Service
Category

Drivetrain

Section

Axle/Differential

Market USA

Applicability
YEAR(S)

MODEL(S)

ADDITIONAL INFORMATION

2021 - 2024

4Runner

VDS(s): BU5JR, HU5JR, JU5JR, KU5JR,
LU5JR, MU5JR, NU5JR, PU5JR, RU5JR,
SU5JR, TU5JR, UU5JR
Drive Type(s): 4WD

Introduction

Some 2021 – 2024 model year 4Runner vehicles may exhibit a cyclic growl/groan noise from the
front of the vehicle while driving in 2WD at around 30 – 50 mph (48 – 80 kph). The noise subsides
when the vehicle is put into 4WD. This condition may be more prominent in colder temperatures.
Follow the Repair Procedure in this bulletin to address this condition.

Warranty Information
OP CODE

DESCRIPTION

TIME

TC2302

Prepare The Threaded Holes and Install the
Dynamic Damper

0.5

R & R Front Differential

2.9

Combo A

OFP

T1

T2

41110-#####*

9B

43

*Warranty claim MUST be submitted with the correct 10-digit OFP. Choose the correct OFP for the vehicle being repaired
by searching for the parts in the Electronic Parts Catalog using the VIN filter.

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.

© 2023 Toyota Motor Sales, USA

Page 1 of 4

T-SB-0075-23

October 5, 2023

Page 2 of 4

Cyclic Growl/Groan Noise from Front Differential
Parts Information
PART NUMBER

PART NAME

QUANTITY

41196-60020

Differential, Dynamic Damper

1

41110-35A92

Front Differential

0–1

91511-80820

Bolt, Flange

2

Required Tools & Equipment
REQUIRED TOOLS & MATERIAL

QUANTITY

Thread Chaser/Tap & Die Set or Equivalent

1

Repair Procedure

1. Confirm the condition exists.
Does the vehicle exhibit a cyclic growl/groan noise from the front of the vehicle while driving in
2WD at around 30 – 50 mph (48 – 80 kph)?


YES — Continue to step 2.



NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.

2. Confirm the front differential
production date.

Figure 1.

Is the vehicle equipped with a front
differential built BEFORE April 11th, 2022?


YES — Continue to step 3.



NO — Go to step 4.

1
c

1

© 2023 Toyota Motor Sales, USA

Production Date (YY.MM.DD)

T-SB-0075-23

October 5, 2023

Page 3 of 4

Cyclic Growl/Groan Noise from Front Differential
Repair Procedure (continued)

3. Replace the front differential.
Refer to TIS, applicable model and model year Repair Manual:


2021 – 2024 4Runner:
Drivetrain – Axle and Differential – “Axle And Differential: Front Differential Carrier
Assembly (for 4WD): Removal / Installation”

4. Remove the No. 1 engine under cover sub-assembly.
Refer to TIS, applicable model and model year Repair Manual:


2021 – 2024 4Runner:
Engine/Hybrid System – Engine Mechanical – “1GR-FE (Engine Mechanical): Engine
Assembly: Removal”

5. Locate the front No.1 differential support
with two threaded holes.

Figure 2.

1
c

2
c

6. If debris or rust is present in the threaded
holes, use a M8 x 1.25 thread chaser or
tap to prepare the threads.

1

Front

2

Two Threaded Holes

Figure 3.

© 2023 Toyota Motor Sales, USA

T-SB-0075-23

October 5, 2023

Page 4 of 4

Cyclic Growl/Groan Noise from Front Differential
Repair Procedure (continued)

7. Install the dynamic damper facing upward
with the two flanged bolts.

Figure 4.

Torque: 25 N*m (254.9 kgf*cm, 19 ft*lbf)

8. Reinstall the No. 1 engine under cover sub-assembly.
Refer to TIS, applicable model and model year Repair Manual.
2021 – 2024 4Runner:
Engine/Hybrid System – Engine Mechanical – “1GR-FE (Engine Mechanical): Engine
Assembly: Installation”
9. Confirm the noise level has improved.

© 2023 Toyota Motor Sales, USA