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Drivetrain› Differentials and Rear-End Components

Zumbrota Drivetrain

10.5" 14 Bolt Rear Axle Assembly 4.56

$3,085.38 $2,804.89 Save $280.49

SKU: RAA435-1957X1-L

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$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
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Moderate — 2–4 hours

Overview

The Zumbrota Drivetrain RAA435-1957X1-L is a rear axle assembly designed for GM 10.5" 14 bolt full float applications. It features a 4.56 gear ratio and a Grizzly differential. This assembly is built to order and is part of Zumbrota's performance axle line, which includes aftermarket gear upgrades for enhanced performance.
Show original supplier description
The Zumbrota Performance Axle, Rear Axle Assembly, GM 10.5" 14 bolt Full Float, '99-'07 GM 2500 Pickup ('07 Classic), 4.56 Ratio, Grizzly is engineered to deliver enhanced performance for your vehicle. This assembly features a robust 4.56 gear ratio and a Grizzly differential, providing customized performance for various driving needs. Zumbrota Performance Axles are recognized as the standard in remanufacturing performance, with all tubes inspected and straightened to OEM specifications. The inclusion of aftermarket gear upgrades is intended to optimize performance for the way you drive. This rear axle assembly is specifically designed for GM 10.5" 14 bolt full float applications. Zumbrota Drivetrain emphasizes their commitment to performance, offering custom options such as Limited Slip Differentials and Lockers to further tailor the vehicle's capabilities. The product is built to order and typically ships when ready, with options for expedited shipping available at checkout.

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 NumberRAA435-1957X1-L
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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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