Drivetrain› Differentials and Rear-End Components

Dana

COUPLING SHAFT

$2,167.43

SKU: D00O 810663-4521R

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Description

High-performance series single reduction tandem axle for heavy and medium-duty trucks. Approved for engines up to 650 HP and 2050 lb.ft. Features include a 500,000-mile lube drain interval, no-maintenance axle venting, and a micro-lip seal and slinger system. Max. GAW (Gross Axle Weight): 40,000 lbs (18,144 kg). Max GCW Hwy (Gross Combined Weight - Highway): 110,000 lbs (49,895 kg). Ratio: 4.63. Body Diameter: 1.88 in (48 mm). Spline Count: 41. Spline Diameter: 2.10 in (53 mm).

Fitment

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Specifications

BrandDana
Part NumberD00O 810663-4521R

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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