Drivetrain› Differentials and Rear-End Components

USA Standard (Yukon)

35.46in 30Spline INNER Left hand 8.5in 79 and UP GM Truck and BLAZER .

$225.89

SKU: U018 ZA W39255

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Easy — 1–2 hours

Description

The USA Standard Gear ZA W39255 is a left-hand inner axle shaft designed for 1979 and newer GM trucks and Blazers with a GM 8.5" differential. Constructed from 4340 chromoly, this axle shaft is built for durability and to exceed OE quality.

It features 30 splines and a length of 35.46 inches, making it a direct fit for compatible vehicles. The material and heat treatment are intended to withstand significant stress and provide reliable service in demanding conditions.

Fitment

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Specifications

BrandUSA Standard (Yukon)
Part NumberU018 ZA W39255

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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