Sale

Zumbrota Drivetrain

Rear Axle Assembly, AAM 11.5" Ring Gear, 3.73 Ratio

$4,422.98 $4,020.89 Save $402.09

SKU: RAA435-281A

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

Description

The Zumbrota Drivetrain RAA435-281A is a remanufactured rear axle assembly built for specific GM applications. This assembly features an AAM 11.5 inch ring gear with a 3.73 gear ratio, designed for Dual Rear Wheel (DRW) configurations. It is explicitly stated to be 'Without Posi Traction' and 'Without Wide Track' options (GTY) and is intended for Cab Chassis models from 2011 through 2014. The housing undergoes a thorough cleaning process using hydro blasting and rinsing to restore it to an OEM finish, and correct rolling torque is established using precise inch-pound measurements for optimal setup and longevity. It is important to note that this rear axle assembly does not include essential components such as hubs, brakes, backing plates, or axle shafts, which must be sourced separately.

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 NumberRAA435-281A
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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