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Service bulletin SU2302

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 id10244319
Published by NHTSA2023-10-29
Manufacturer's numberSU2302
Manufacturer's date2023-10-26
NHTSA componentENGINE AND ENGINE COOLING; POWER TRAIN

NHTSA's summary

Revised: Coolant leaks at the transmission cooler fittings on the radiator are occurring due to deformation of the gasket used to seal off the transmission cooler. This deformation is caused from transmission oil wicking through the thread adapter threads and exposing the lower portion of the gasket to transmission oil. Re-configure hydraulic interface between the transmission cooler lines and the transmission oil cooler. SU2302 Revised to include Labor Time of 1 Hour and a Component Code. Incorrect wording on the Header Page beginning on Page 2.

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

Engine, Transmission and driveline

Vehicles listed
BLUE BIRD VISION SCHOOL BUS2022 to 2025
BLUE BIRD VISION TRANSIT BUS2022 to 2025

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