Product images and videos 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.

Drivetrain› Differentials and Rear-End Components

Zumbrota Drivetrain

3.73 Ratio Ring and Pinion Gear Set

Name: 3.73 Ratio Ring and Pinion Gear Set
Brand: Zumbrota Drivetrain
SKU: ZG D30S-373TJ

$253.95

SKU: ZG D30S-373TJ

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Overview

The USA Standard Ring & Pinion gear set is designed for Dana Spicer 30 axles with a short pinion. This set features a 7.20-inch ring gear diameter, 26 spline pinion, and 10 ring gear bolts. It provides a 3.73 gear ratio, offering a balance between acceleration and fuel efficiency for compatible vehicles.

USA Standard Gear offers a full line of ring and pinion sets for various applications, ensuring confidence in installation. This specific set comes with a 1-year warranty against manufacturer defects.

Show original supplier description

The USA Standard Ring & Pinion gear set is engineered for reliable performance in Dana Spicer 30 axles featuring a short pinion design. This set is precisely manufactured with a 7.20-inch ring gear diameter, a 26-spline pinion, and utilizes 10 ring gear bolts for secure mounting. With a 3.73 gear ratio, this set provides a versatile gearing solution. This ratio is often chosen to enhance acceleration and off-road capability without significantly compromising highway cruising RPMs, making it a popular choice for many Jeep TJ models. USA Standard Gear aims to provide confidence in installation with their quality components. This ring and pinion set is backed by a 1-year warranty against manufacturer defects, underscoring the brand's commitment to quality and durability.

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

Brand	Zumbrota Drivetrain
Part Number	ZG D30S-373TJ
Category	Drivetrain

Videos

USA Standard Unboxing - Master Overhaul Kit

How To: Properly Break-In A NEW Ring & Pinion Gear Set

Setting Backlash Dana 30 Differential / Short Clip from regearing Jeep Axles / xj TJ jk jl

Dana 30 Eaton Truetrac Differential And Yukon Ring Gear Install / Making setup Bearings / Jeep xj

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