USA Standard Gear

Ring and Pinion Gear Set 3.23 Ratio 30-Spline

$333.89

SKU: ZG GM8.5-323

In Stock
In Stock
Ships by Sep 1
Free Shipping over $200
$100 Minimum Order
30 Days Return

Description

The USA Standard Gear ZG GM8.5-323 is a ring and pinion gear set engineered for GM 8.5" and 8.6" axles, offering a 3.23:1 gear ratio. This component is crucial for re-establishing proper differential performance. It features a 30-spline pinion and requires 10 ring gear bolts. The ring gear diameter is 8.50 inches, making it a direct fit for compatible GM axle housings. USA Standard Gear is known for providing reliable components that instill confidence in the installation process. USA Standard Gear offers a standard one-year warranty against defects on their ring and pinion sets, ensuring quality and peace of mind.

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 GM8.5-323
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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