Zumbrota Drivetrain

Muscle Car Re-Gear Kit 3.73 Ratio 10 Bolt 17 Spline

$861.89

SKU: YGK2366

In Stock
In Stock
Ships by Aug 31
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

This comprehensive kit upgrades your differential with a more aggressive 3.73 gear ratio, providing that sought-after 'shot out of a cannon' acceleration. It is designed to fit GM 55P differentials and is suitable for a range of applications, including ’56 to ’62 Corvettes, ’55 to ’64 Bel Air models, and other hot-rodded vehicles equipped with a GM 55P differential from the ’55 to ’64 passenger car range. Included in this re-gear kit are all the essential components for a successful installation. You'll find the ring and pinion gear set, a 17 spline pinion gear, and all the required bearings and installation hardware. The 10 bolt ring gear specification ensures compatibility with the intended differential housing.

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

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Specifications

BrandZumbrota Drivetrain
Part NumberYGK2366
CategoryDrivetrain

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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.

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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.

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