Drivetrain› Differentials and Rear-End Components
USA Standard (Yukon)
Rear Axle Kit Fits GM 12T Diff 30 Spline 31-7/16 Long
SKU: U018 ZA K630105
Easy — 1–2 hours
Description
Constructed with advanced alloys and heat-treating technologies, this axle kit ensures strength and durability. It includes a wheel bearing, seal, differential cover gasket, studs, and lug nuts for a complete solution. The wheel bearing has an outer diameter of 2.53 inches, and the axle length is 31.4375 inches.
Fitment
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Specifications
| Brand | USA Standard (Yukon) |
| Part Number | U018 ZA K630105 |
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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