Freightliner, Thomas Radiator - Freightliner 1003669, Thomas Built Buses VAB 1102416, Northern Radiator 239387, Reach Cooling 42-10342

The Reach Cooling 42-10342 is an aftermarket radiator built to directly replace Freightliner 1003666 and Thomas Built Buses VAB 1102416, making it the go-to cooling system solution for Freightliner MB Line, MC Line, MT35, MT45, and MT55 trucks as well as the Thomas Saf-T-Liner bus. This unit also cross-references Northern Radiator 239387, Active Radiator Supply Company 800027, Spectra Premium 2001-1720, and 1-800-Radiator T734377, giving fleet buyers and mechanics a reliable one-part solution across a broad range of applications spanning model years 2003 through 2015. The aluminum core and plastic tank construction meets or exceeds OE specifications, and the radiator ships with a built-in transmission oil cooler, eliminating the need for a separate cooler in most installations. Reach Cooling engineers these radiators with reinforced B-type tubes, deep extrusion headers for a stronger tube-to-header joint, folded fin edges for improved heat disbursement, and thermal expansion cuts that extend core life through normal heat cycles. Whether you are maintaining a delivery fleet of MT55 step vans or servicing a Thomas Saf-T-Liner school bus, the 42-10342 delivers a correct, direct-fit replacement that installs without modification and performs as the original was designed to.