Drivetrain› Differentials and Rear-End Components

Speedway

9-inch Helical Gear Posi 3rd Member Assembly

$1,093.99

SKU: 91049349

In Stock
In Stock
Ships by Jul 29
Free Shipping
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Speedway Motors Ford 9-inch Helical Gear Posi 3rd Member Assembly is a hand-assembled differential built with quality components. It features a tough, nodular iron center section with additional material in critical areas for increased strength and resistance to fracturing compared to OEM "gray" iron. The assembly includes thick, forged steel bearing caps and precision Grade 8 cap screws, along with billet steel adjuster nuts and heavy-duty keepers to maintain precise ring gear settings.

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.

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Specifications

BrandSpeedway
Part Number91049349
CategoryDrivetrain

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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