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Service bulletin 21-008-15 REV-B

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 id10148973
Published by NHTSA2018-11-26
Manufacturer's number21-008-15 REV-B
Manufacturer's date2015-08-15
NHTSA componentPOWER TRAIN:CLUTCH ASSEMBLY

NHTSA's summary

Transmission Shift Quality C-Clutch Snap Ring This bulletin involves removing the transmission, disassembling, and replacing the C-Clutch snap ring. A small number of customers may experience less than desired shift quality during a 5-4 downshift and/or Malfunction Indicator Lamp (MIL) Illumination. Upon further inspection, the technician may find Diagnostic Trouble Code (DTC) U0402 setting in the Powertrain Control Module (PCM) memory.

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, Clutch

Trouble codes named

U0402

Vehicles listed
CHRYSLER 2002015
JEEP CHEROKEE2014, 2015

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
53034160A2022-09-15. Service bulletin. Accelerator Pedal
06-001-162017-11-03. Service bulletin. Clutch Pedal Operation X62 Extended Warranty This bulletin involves the replacement of the hydraulic clutch master cylinder and reservoir hose. Some customers may experience a reduction in clutch pedal stroke.
06-001-16 REV. A2017-11-03. Service bulletin. Clutch Pedal Operation X62 Extended Warranty This bulletin involves the replacement of the hydraulic clutch master cylinder and reservoir hose. Some customers may experience a reduction in clutch pedal stroke.
D-16-01 X622017-10-21. Service bulletin. Hydraullic Clutch Master Cylinder / Reservoir Hose To announce an extended warranty on the Hydraullic Clutch Master Cylinder / Reservoir Hose Effective Immediately