WenmarOpen by Wenmar Pro

Service bulletin TSB_TRA100

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)
TypeService bulletin
NHTSA id10206957
Published by NHTSA2022-02-04
Manufacturer's numberTSB_TRA100
Manufacturer's date2022-01-19
NHTSA componentEQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL; POWER TRAIN:CLUTCH ASSEMBLY; POWER TRAIN

NHTSA's summary

TECHNICAL SERVICE BULLETIN: 8 SPEED WET DUAL CLUTCH TRANSMISSION (WDCT) JUDDER EVALUATION - This bulletin provides information to inspect for judder in the 8-speed Wet Dual Clutch Transmission (WDCT) and possibly replace the Dual Clutch Assembly on some 2021MY~ K5 GT (DL3a) vehicles produced from November 16, 2020 and later and Sorento EX trim and above (MQ4a) non-hybrid vehicles, produced from October 26, 2020 and later, which may exhibit clutch judder. If the vehicle body vibrates without the steering wheel shuddering when performing the creep driving test (driving the vehicle up to 3mph), the vehicle is exhibiting clutch judder. The creep test can be conducted by driving at a speed slower than 5 mph after releasing the brake.

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

Equipment and accessories, Labels and manuals, Transmission and driveline, Clutch

Vehicles listed
KIA K52021, 2022
KIA SORENTO2021, 2022

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

Other bulletins for the same vehicles and component
TSB_TRA101_CLSD2023-04-06. Service bulletin. TSB_TRA101_CLSD: TECHNICAL SERVICE BULLETIN: SERVICE ACTION: 8-SPEED DUAL CLUTCH TRANSMISSION (DCT) S/W LOGIC IMPROVEMENT (SA502) - SA502 superseded by SA526, TSB CLOSED.