Drivetrain› Differentials and Rear-End Components

Motive Gear

~(18.4 lbs. 15X11X5)~ RP GM 8.5 8.6 4.56 EXL

$287.95

SKU: M01Z GM85456

In Stock
In Stock
Ships by Jun 15
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Motive Gear GM85456 is a differential ring and pinion gear set designed for GM 8.5"/8.625" axles with a 4.56 gear ratio. It features 9 pinion teeth, 41 ring teeth, a 1.626" pinion shaft diameter, and 30-spline count.

Manufactured from 8620 steel, this gear set is built for strength and quiet operation, suitable for high-performance street, off-road, and towing applications. The set includes precision-machined gears with a 10-bolt ring gear arrangement and is compatible with differential carrier breaks of 2.73 and higher.

Fitment

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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.

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Specifications

BrandMotive Gear
Part NumberM01Z GM85456

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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