Drivetrain› Differentials and Rear-End Components

USA Standard Gear

Spartan Helical LSD for Dana 30

$577.89

SKU: SL D30-4-27-LSD

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

Advanced — 4+ hours

Overview

The USA Standard Gear Spartan Helical LSD is a limited slip differential designed for Dana 30 front differentials. It features a 10-pinion design for optimal load distribution and helical-cut worm gears to direct torque to the tire with the most grip. This differential is built with a forged 8620 steel alloy case and internals for superior durability.
Show original supplier description
The USA Standard Gear Spartan Helical LSD is engineered for enhanced off-road control and traction in Dana 30 front differentials. Its robust 10-pinion design surpasses 6- or 8-pinion units by providing more contact points for superior load distribution. Constructed with a forged 8620 steel alloy case and internals, this limited slip differential offers exceptional durability for demanding off-road conditions. It is designed for 27 spline axles and is compatible with gear ratios of 3.73 and up. The manufacturer recommends using non-synthetic 80W-90 GL-5 gear oil and advises against the use of friction modifiers. This differential offers maintenance-free, worry-free performance with smooth engagement and linear traction. This differential is specifically designed to fit 1987-2026 Jeep Wrangler models, including YJ, TJ, JK, and JL. Note: This product contains chemicals, including arsenic, known to the State of California to cause cancer. Please refer to P65Warnings.ca.gov for more information.

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 NumberSL D30-4-27-LSD
CategoryDrivetrain

About MOTORMIA

5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold

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