USA Standard Gear

Dana 30 4.88 Ratio Ring and Pinion Gear Set

$277.01

SKU: ZG D30SR-488JK

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

Description

The USA Standard Gear ZG D30SR-488JK is a replacement ring and pinion gear set specifically engineered for the Dana 30 front axle found in Jeep Wrangler JK models. This kit provides a 4.88 gear ratio, crucial for enhancing tire performance and drivability after larger tire installations. Key specifications for this gear set include a 7.33-inch ring gear diameter, 10 ring gear bolts for secure mounting, and a 24-spline pinion. The design is intended for reverse rotation Dana Spicer 30 axles, ensuring proper fitment and function within the Jeep JK's front differential. This gear set is compatible with Jeep Wrangler JK models from 2007 to 2017. Proper installation of ring and pinion gears requires specialized tools and knowledge; professional installation is recommended to ensure correct setup and prevent premature wear or failure.

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 D30SR-488JK
CategoryDrivetrain

We’re here — turning wrenches, just like you.

Call us, follow along, or come say hi.

(760) 282-4645 Instagram Google

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.

View Full Shipping Policy