T-SB-0023-19-Rev

T-SB-0023-19
Rev1
March 4, 2019
Rear Vibration or Noise While Braking
Service
Category
Drivetrain
Section
Axle/Differential
Market USA
Applicability
YEAR(S)
MODEL(S)
2017 - 2019
Tacoma
ADDITIONAL INFORMATION
REVISION NOTICE
May 17, 2019 Rev1:
 The Production Change Information section has been updated.
Any previous printed versions of this bulletin should be discarded.
SUPERSESSION NOTICE
The information contained in this bulletin supersedes Service Bulletin No. T-SB-0023-18.
 Applicability has been updated to include 2019 model year Tacoma vehicles.
Service Bulletin No. T-SB-0023-18 is obsolete and any printed versions should be discarded.
Introduction
Some 2017 – 2019 model year Tacoma vehicles with the BD20 differential may exhibit a noise or
vibration from the rear of the vehicle at low speeds or while braking. This condition may be
caused by excessive clearance between the brake drum and axle drum flange. Follow the Repair
Procedure in this bulletin to address this condition.
© 2019 Toyota Motor Sales, USA
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Rear Vibration or Noise While Braking
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.
MODEL
PLANT
DRIVETRAIN
ENGINE
PRODUCTION CHANGE EFFECTIVE VIN
5TFRX5GN#K X145148
2TR
5TFAX5GN#K X145152
5TFAZ5CN#K X080700
2WD
5TFBZ5DN#K X004740
2GR
5TFEZ5CN#K X080704
TMMTX
5TFRZ5CN#K X080696
2TR
5TFSX5EN#K X066596
5TFCZ5AN#K X184778
Tacoma
4WD
5TFSZ5AN#K X184749
5TFDZ5BN#K X042735
5TFGZ5AN#K X184851
3TMAZ5CN#KM093103
2GR
2WD
3TMBZ5DN#KM019835
3TMEZ5CN#KM093149
TMMBC
3TMCZ5AN#KM229594
4WD
3TMGZ5AN#KM229594
3TMDZ5BN#KM065229
Warranty Information
OP CODE
DESCRIPTION
TIME
TC1801
R & R Rear Axle Shaft
2.6
Combo A*
Opposite Side
1.2
OFP
T1
T2
42311-04082
91
50
*Combo A is ONLY applicable if both sides need to be replaced.
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.
© 2019 Toyota Motor Sales, USA
T-SB-0023-19
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Rear Vibration or Noise While Braking
Parts Information
PART NUMBER
PART NAME
QTY
42311-04082
Shaft, Rear Axle
1
90942-02081
Bolt Hub, Type B
6
90942-02049
Bolt Hub, Type A
6
42450-04010
Hub & Bearing Assy, Rear Axle (RH)
1
42460-04010
Hub & Bearing Assy, Rear Axle (LH)
1
42443-60010
Drum, Oil Deflector Gasket
1
90301-83002
Ring, O Rear, Axle Bearing Case
1
42444-35050
Brake Drum, Gasket
1
42423-60050
Rear Axle Bearing, Inner Retainer
1
90520-41019
Ring, Snap Rear Axle Shaft
1
90310-58003
Seal, Oil
1
Required Tools & Equipment
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
Seal Ring Tool*
09631-12090
1
Oil Seal Puller*
09308-00010
1
Rear Axle Shaft Puller*
09521-25011-01
1
Rear Axle Shaft Puller Adapter*
09521-25021-01 or 09521-60010-01
1
Hub Bolt Remover (Special Order)
09650-17011
1
Bearing Replacer Set 2*
09950-60020-01
1
Handle Set*
09950-70010-01
1
*Essential SST.
NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
REQUIRED TOOLS & MATERIAL
QUANTITY
Measuring Caliper
1
Wire Brush
1
© 2019 Toyota Motor Sales, USA
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Rear Vibration or Noise While Braking
Repair Procedure
1. Confirm the condition exists.
Is a vibration or noise present from the rear of the vehicle at low speeds or while braking?
 YES — Continue to step 2.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Inspect the rear drum and brake assembly for ANY signs of defects or wear.
NOTE
Refer to the applicable model year Toyota Tacoma Warranty and Maintenance Guide for additional
information on warranty coverage.
Refer to TIS, applicable model and model year Repair Manual:
 2017 / 2018 / 2019 Tacoma:
Brake – Brake (rear) – “Brake: Rear Brake: Inspection”
Does the rear drum or brake assembly exhibit ANY signs of defect or wear?
 YES — Remedy ANY noticeable defects or wear BEFORE proceeding and retest.
If the vibration or noise is still present from the rear of the vehicle at low speeds
or while braking, continue to step 3.
 NO — Continue to step 3.
3. Visually inspect the rear axle flange for
corrosion/rust buildup.
Does the vehicle exhibit ANY
corrosion/rust buildup on the rear
axle flange?
 YES — Using a wire brush, remove
the corrosion/rust buildup, then
continue to step 4.
 NO — Continue to step 4.
Figure 1. Inspection Location
© 2019 Toyota Motor Sales, USA
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Rear Vibration or Noise While Braking
Repair Procedure (continued)
4. Measure the diameter of the axle flange
(location shown).
Figure 2. Side View and Location of Axle Flange
A. Using a digital or dial caliper, measure
the axle flange boss diameter as shown.
Figure 3.
B. Take measurements in three locations
(as shown) around the flange to verify
the diameter.
Figure 4.
© 2019 Toyota Motor Sales, USA
T-SB-0023-19
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March 4, 2019
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Rear Vibration or Noise While Braking
Repair Procedure (continued)
5. Is the axle flange boss diameter out of specification?
Specification: 108.000 mm – 107.946 mm (4.252 in. – 4.250 in.)

YES — Continue to step 6.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
6. Replace the axle.
Refer to TIS, applicable model and model year Repair Manual:
NOTE
During Repair Manual reassembly step 5A (Install rear axle shaft), use SST 09631-12090.
Do NOT use SST 09521-25011.

2017 Tacoma:
Drivetrain – Axle/Differential – “Axle: Rear Axle Shaft: Removal / Disassembly /
Reassembly / Installation”

2018 Tacoma:
Drivetrain – Axle/Differential – “Axle: Rear Axle Shaft: Removal / Disassembly /
Reassembly / Installation”

2019 Tacoma:
Drivetrain – Axle/ Differential – “Axle: Rear Axle Shaft: Removal / Disassembly /
Reassembly / Installation”
7. Test-drive the vehicle to confirm the noise or vibration is no longer present.
© 2019 Toyota Motor Sales, USA