Drivetrain› Differentials and Rear-End Components

Zumbrota (Yukon)

Zumbrota Performance Axle Rear Axle Assembly Ford 8.8 IRS 15- 22 Ford Mustang 3.73 Ratio Duragrip RAA440-1557X1

$3,299.89

SKU: Z00G RAA440-1557X1

In Stock
In Stock
Ships by Jun 20
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Zumbrota Performance Axle Assembly is a rear axle designed for enhanced traction, higher speeds, and heavier towing capabilities. This assembly features a 3.73 gear ratio and a Duragrip limited-slip differential. Each unit is meticulously rebuilt to high quality standards, with all internal components inspected and tested, and all bearings and seals replaced. An exclusive hydro-blast rinse, sandblasting, and shot-enticed deep cleaning procedure ensures superior quality.

Fitment

Fitment Guaranteed

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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 (Yukon)
Part NumberZ00G RAA440-1557X1

Videos

Ford 8.8 IRS Rebuild

Ford 8.8 IRS Rebuild
A Guide to Setting Up Your Ford 8.8" Rear End

A Guide to Setting Up Your Ford 8.8" Rear End

Buy with Confidence

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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