Zumbrota Drivetrain

Rear Axle Assembly 4.56 Ratio Open Differential

$2,535.38

SKU: RAA435-2239X1

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 specifically designed for GM 8.6 differentials. This unit features an open differential and a 4.56 gear ratio, providing enhanced performance tailored to your driving needs. It is engineered for 2005-2007 GM 1500 Pickup trucks. As a standard in remanufacturing performance, Zumbrota Performance Axles include aftermarket gear upgrades to optimize your vehicle's performance. Additionally, all tubes undergo inspection to guarantee they are straightened to OEM specifications, upholding quality and reliability. This rear axle assembly is built to order and ships when ready. Zumbrota offers expedited shipping options at checkout, with most orders expected to arrive within 1-2 days. A refundable core charge of $400 is applicable, which is returned upon receipt of your old, salvageable part for recycling or rebuilding. Customers can find detailed core return instructions on Zumbrota's website.

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

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandZumbrota Drivetrain
Part NumberRAA435-2239X1
CategoryDrivetrain

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

(760) 282-4645 Instagram Google

Buy with Confidence

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.

View Full Return Policy

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.

View Full Shipping Policy