Drivetrain› Differentials and Rear-End Components

USA Standard Gear

GM 9.25" Ring and Pinion Gear Set 4.11 Ratio

$323.87

SKU: ZG GM9.25-411R

Special Order
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The USA Standard Gear ZG GM9.25-411R is a ring and pinion gear set designed for GM 9.25" front differentials. It features a 4.11 ratio, a 9.25-inch ring gear diameter, 30 spline pinion, and 12 ring gear bolts. These gears are an upgrade for towing, hauling, racing, or off-roading applications.

These gears are built with high performance quality and are designed from state-of-the-art software. They are intended to restore acceleration lost from adding oversized wheels and tires, and can help your truck run more efficiently. A higher ratio can allow your engine to put more power to the ground while reducing stress on the engine and transmission.
Show original supplier description
The USA Standard Gear ZG GM9.25-411R is a high-performance ring and pinion gear set engineered for GM 9.25" front differentials with reverse rotation. The 4.11 ratio helps the engine deliver more power to the ground while reducing stress on the powertrain. Constructed with strong, high-performance quality and designed using state-of-the-art software, these gears undergo rigorous in-house quality evaluation to ensure they meet dimensional, material, and fitment testing standards. Key specifications include a 9.25-inch ring gear diameter, a 30-spline pinion, 12 ring gear bolts, and the 4.11 ratio. Installation of new gears in an axle generally requires common hand tools, along with a hydraulic press and dial indicator for correct setup. It is also recommended to purchase a master overhaul kit, which typically includes new bearings, seals, shims, and a pinion crush sleeve. These components are essential for ensuring reliable and quiet operation for years to come. USA Standard backs its ring and pinion gears with a one-year warranty against manufacturer defects.

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

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandUSA Standard Gear
Part NumberZG GM9.25-411R
CategoryDrivetrain

Videos

REGEAR AND REBUILD DODGE 9 1/4 REAR IN RAMCHARGER

REGEAR AND REBUILD DODGE 9 1/4 REAR IN RAMCHARGER

5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

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.

View Full Return Policy

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.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy