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KP Services Crossville · Drivetrain
UNT RS4043903941-C
In stock · ships from Knoxville
This is a used differential core for the Dana Spicer RS404 tandem axle, specifically the rear‑rear position.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
The RS404 is a heavy‑duty, 40,000‑lb GAWR truck axle used in Class 8 over‑the‑road, dump, and heavy‑haul applications. The core is sold uninstalled as a rebuildable/exchange unit, with a 3.90:1 gear ratio. It is intended for remanufacturing or direct replacement of a worn or damaged differential carrier.
Part Number: UNT RS4043903941-C
DIFFERENTIAL CORE
Dealer: KP Services Crossville
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