DS404/RS404

Stock Number DS404-RS404
Gear Ratios Available in a wide variety of ratios.

The DS404 diff refers to the Dana Spicer DS404, a heavy-duty, single-reduction forward tandem drive axle differential. Commonly manufactured in collaboration with Eaton, it is primarily used in Class 8 commercial semi-trucks and heavy vocational vehicles to manage up to 40,000 lbs of axle weight.

The DS404 is routinely paired with the RS404 (rear-rear differential) to complete a truck’s tandem drive system. It serves fleets requiring strong, cost-effective, and long-lasting driveline performance, from over-the-road freight hauling to severe-duty vocational jobs

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