Drivetrain› Differentials and Rear-End Components

Motive Gear

R&P 6.66 FORD 9 AX FACTORY LIGHTENED

$756.99

SKU: M01Z F890666AX

In Stock
In Stock
Ships by Jun 9
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Motive Gear F890666AX is a specific ring and pinion kit within the AX Series, crafted for Ford 9-inch rear axles. It features a 6.66 gear ratio, which is ideal for applications requiring significant torque multiplication, such as drag racing or rock crawling. The pinion is designed with 28 splines, ensuring a strong and secure connection within the differential assembly. This kit is a direct replacement for compatible Ford 9-inch applications, offering a performance upgrade over stock gearing.

Fitment

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Specifications

BrandMotive Gear
Part NumberM01Z F890666AX

Videos

Motive Gear Ring & Pinion Install

Motive Gear Ring & Pinion Install
How to Install a 9 Inch Ford Ring & Pinion Gear Set

How to Install a 9 Inch Ford Ring & Pinion Gear Set

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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