Zumbrota Drivetrain

Rear Axle Assembly 4.88 Open Differential

$3,276.78

SKU: RAA435-172X3

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

Description

The Zumbrota Performance Axle is a remanufactured rear axle assembly built to high standards of precision and reliability, intended for GM 8.6 inch axles. This assembly comes with an aftermarket 4.88 gear ratio and an open differential, suitable for applications requiring stronger traction, higher speeds, or heavier towing capabilities beyond stock. Each axle assembly undergoes thorough inspection for straightness, cracks, and surface wear, ensuring the integrity of all tubes and housings. All internal components, including ring and pinions, gears, clutches, and carriers, are inspected and tested. New bearings and seals are installed, and the gears are checked for optimal tooth contact patterns and correct rolling torque for precise setup and longevity. Zumbrota utilizes an exclusive hydro-blast rinse, sandblasting, and proprietary shot-enticed deep cleaning procedure in their remanufacturing process.

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 NumberRAA435-172X3
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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