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Service bulletin TSIB 25-08

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 id11024489
Published by NHTSA2025-10-25
Manufacturer's numberTSIB 25-08
Manufacturer's date2025-10-15
NHTSA componentSTEERING

NHTSA's summary

MCI noticed that some customers operating in severe duty environments were experiencing the exterior U-Joints of the lower steering shaft binding due to corrosion. Because of this, MCI has developed a new re-greaseable U-Joint service kit (NF PN: 6505981) to replace the existing greased for life U-Joint on lower steering shafts. Rework instruction and preventive maintenance guide are provided below. Following this procedure and preventive maintenance will increase the life of MCI lower steering shafts.

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

Steering

Vehicles listed
MCI D4020ISTV2024 to 2025
MCI D45002024
MCI D45052024
MCI D45202024 to 2025
MCI D45CRT2024 to 2025
MCI D45CRTE2024
MCI D45CRTELE2024
MCI D45CRTLE2024 to 2025
MCI J35002024 to 2025
MCI J45002024 to 2026
MCI J4500E2025

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