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Drivetrain› Differentials and Rear-End Components

USA Standard Gear

3.73 Ratio Ring and Pinion Gear Set

$385.98 $350.89 Save $35.09

SKU: ZG GM7.2-373R

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$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
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Moderate — 2–4 hours

Overview

The USA Standard Gear ring and pinion set is a differential component designed for GM IFS 7.2" axles. This set features a 3.73 ratio and is intended for rear axle applications.

USA Standard Gear aims to exceed OEM specifications, with all sets undergoing rigorous in-house quality evaluation to ensure dimensional accuracy, material integrity, and proper fitment.
Show original supplier description
Designed for GM IFS 7.2" rear differentials, this kit offers a 3.73 ratio, providing a balance between acceleration and highway cruising capabilities. Each set is subjected to stringent in-house quality control measures, including dimensional, material, and fitment testing, ensuring reliability and performance even in demanding conditions. USA Standard Gear also backs this product with a one-year warranty, reflecting their commitment to durability. This ring and pinion set is compatible with a wide range of GM IFS 7.2" vehicles, including various models of Chevrolet Astro, Express, S10, Trailblazer, Buick Rainier, and GMC Envoy, Savana, S15. Fitment extends from the early 1980s through the 2010s, with specific applications detailed in the vehicle fitment list. It is recommended to verify fitment for your exact vehicle year, make, model, and trim.

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 GM7.2-373R
CategoryDrivetrain

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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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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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