Zumbrota Drivetrain

4340 Chromoly Rear Axle

$365.89

SKU: YA GM11.5-30-40.25

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

Constructed from robust 4340 Chromoly steel, this axle is built to withstand demanding driving conditions and ensure long-lasting performance. With a long spline length, this axle can be precisely cut to accommodate custom lengths ranging from 35 inches to 40.25 inches, offering flexibility for various build specifications. It serves as a direct replacement for the GM 20920663 axle, simplifying installation and ensuring compatibility. The flange features a 4.760" outside diameter for a secure fitment. Its robust construction and precise specifications make it a suitable choice for enthusiasts and professionals seeking dependable drivetrain components.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandZumbrota Drivetrain
Part NumberYA GM11.5-30-40.25
CategoryDrivetrain

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Returns & Fitment

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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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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