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UNT RS4043903941

Differential, Rear REMAN DANA DIFF ASSY

This is a remanufactured Dana Spicer RS404 complete rear differential assembly for Class 8 heavy-duty trucks. It is designed for the rear‑rear position in tandem drive axles, with a 3.90:1 ratio and a hypoid ring gear. The unit is rebuilt to OEM specifications with proper gear contact, backlash, and bearing preload, making it a direct replacement for worn or failed differentials in line‑haul, dump, and heavy‑haul applications.