Service bulletin T-TT-0476.18

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10131720
Published by NHTSA	2018-04-02
Manufacturer's number	T-TT-0476.18
Manufacturer's date	2018-01-18
NHTSA component	POWER TRAIN

NHTSA's summary

TT: Rear Differential Torque Confirmation. The Tacoma BD20 Rear Differential has two active part numbers for the fasteners that attach the differential carrier to the axle housing. Vehicles Equipped with BD20 Differential: - Tacoma 4x4 ? 4 cylinder ? Automatic Transmission - Tacoma 4x4 ? 6 cylinder ? Automatic Transmission - Tacoma PreRunner There are 10 fasteners on the BD20 differential (12mm fastener / 8 mm stud). The fastener part numbers are 90170-08042 & 90170-08036. There are two different torque values for these fasteners: 1) 90170-08042 ? 18 ft. lbs. {25 N?m, 255 kgf?cm} 2) 90170-08036 ? 28 ft. lbs. {37 N?m, 378 kgf?cm} Vehicles produced prior to 5/12/2017 should be equipped with 90170-08042. Vehicles produced after 5/18/2017 should be equipped with 90170-08036

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
TOYOTA TACOMA	2017, 2018

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
2017231	2017-04-27. Powertrain
17V285000	2017-04-27. POWER TRAIN:DRIVELINE:DIFFERENTIAL UNIT

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TSB011219	2023-10-16. Service bulletin. TSB: Some 2005 ? 2023 model year Tacoma vehicles equipped with a manual transmission may exhibit a squeak or creak noise from the clutch pedal when it is depressed or released.
T-SB-0124-20 Rev	2022-12-19. Service bulletin. TSB: Some 2016 ? 2023 model year Tacoma vehicles equipped with an automatic transmission (6AT) may exhibit a vibration under deceleration (coasting or braking) typically between 30 ? 10 mph. This vibration is felt in the seat, floorboard, and/or steering wheel. Follow the Repair Procedure in this bulletin to address this condition
T-TT-0705-22 Rev	2022-10-17. Service bulletin. TT: If you see this condition, please create a TAS case and contact TAS for instruction prior to diagnosing or repairing of the vehicle. If it is a weekend or holiday, continue with diagnosis and repair. Please save all parts and/or details and contact TAS on the next available workday.
TTT068422	2022-06-21. Service bulletin. TT: Water intrusion to the ADD actuator is currently being investigated as a cause of 4WD inoperative complaints. P17A0 and P17A4 DTCs may set for this condition but not always
T-SB-0043-20 Rev	2021-03-15. Service bulletin. TSB: Some 2016 ? 2020 model year Tacoma vehicles equipped with a 2GR-FKS engine and a manual transmission may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) P211904 (ECM/PCM Throttle Actuator ?A? Control Throttle Body Range/Performance System Internal Failure) with vehicle entering limp mode. The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition. Follow the Repair Procedure in this bulletin to address this condition.
T-SB-0124-20	2021-02-16. Service bulletin. TSB: Some 2016 ? 2021 model year Tacoma vehicles equipped with an automatic transmission may exhibit a vibration under deceleration (coasting or braking) between 30 ? 10 mph. This vibration is felt in the seat, floorboard, and/or steering wheel. Follow the Repair Procedure in this bulletin to address this condition.
T-SB-0071-19 Obs	2021-02-01. Service bulletin. OBSOLETE NOTICE December 15, 2020: This bulletin is now obsolete. Please see T-SB-0124-20.
T-SB-0124-20	2021-02-01. Service bulletin. TSB: Some 2016 ? 2021 model year Tacoma vehicles equipped with an automatic transmission may exhibit a vibration under deceleration (coasting or braking) between 30 ? 10 mph. This vibration is felt in the seat, floorboard, and/or steering wheel. Follow the Repair Procedure in this bulletin to address this condition.
T-SB-0071-19 Rev	2020-08-03. Service bulletin. TSB: SUPERSESSION NOTICE The information contained in this bulletin supersedes Service Bulletin No. T-SB-0171-16. Some 2016 ? 2019 model year Tacoma vehicles equipped with an automatic transmission may exhibit a vibration under deceleration (coasting or braking) between 30 ? 10 mph. This vibration is felt in the seat, floorboard, and/or steering wheel.
T-SB-0043-20	2020-05-11. Service bulletin. TSB: Some 2016 ? 2017 model year Tacoma vehicles equipped with a 2GR-FKS engine and a manual transmission may exhibit a MIL ON condition with Diagnostic Trouble Code (DTC) P211904 (ECM/PCM Throttle Actuator ?A? Control Throttle Body Range/Performance System Internal Failure) with vehicle entering limp mode. The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition. Follow the Repair Procedure in this bulletin to address this condition.