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Spicer · Drivetrain
6.3-4-5221-1X
In stock · ships from Knoxville
This is a splined end yoke assembly that connects the driveshaft to the differential pinion on heavy-duty trucks.
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Fits many Dana 80 rear axles where a 2.274" x 44-spline pinion stem is used. Always count splines and measure hub diameter before ordering; axle swaps can change the original specification.
Part data verified against 5 catalog sources
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It is a 1760 series half‑round (strap‑style) yoke, meaning the universal joint is held in place with bolts and straps instead of full U‑bolts. You would replace it when the splines are worn, the yoke shows cracks or damage, or when rebuilding a differential to ensure proper driveline alignment and torque transfer.
Part Number: 6.3-4-5221-1X
END YOKE ASSY 6.3-4-5221-1X
Category: Driveline
Unit: ea
Dealer: Post Onsite
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