Sale

USA Standard Gear

3.90 Ratio Ring and Pinion Gear Set

$436.44 $380.99 Save $55.45

SKU: ZG C9.25-390

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

Description

The USA Standard Gear ZG C9.25-390 is a direct replacement ring and pinion gear set engineered for Chrysler 9.25" rear differentials in vehicles made in 2010 and earlier. It features a 9.25-inch ring gear diameter, a 29-spline pinion, and utilizes 12 ring gear bolts. The gear ratio for this set is 3.90, designed to optimize performance for specific applications. USA Standard Gear emphasizes rigorous in-house quality control, with all products undergoing dimensional, material, and fitment testing to ensure they meet stringent quality benchmarks. This commitment to testing ensures reliability and longevity for the end-user. Important fitment information: This gear set is specifically designed for Chrysler 9.25" rear differentials found in models 2010 and down. It will not fit 2011 vehicles or newer models that utilize updated gearing. Compatibility is limited to the specified year range and differential type.

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

BrandUSA Standard Gear
Part NumberZG C9.25-390
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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