---
product_id: 312280875
title: "USA Standard Gear Spartan Locker Helical Limited Slip Differential Worm Positraction Dana 30 Front 27 Spline 3.73 & Up (SL D30-4-27-LSD)"
brand: "usa standard gear"
price: "₨334339"
currency: LKR
in_stock: true
reviews_count: 5
category: "Usa Standard Gear"
url: https://www.desertcart.lk/products/312280875-usa-standard-gear-spartan-locker-helical-limited-slip-differential-worm
store_origin: LK
region: Sri Lanka
---

# Smooth, maintenance-free traction 27 spline Dana 30 fitment Forged 8620 chromoly steel USA Standard Gear Spartan Locker Helical Limited Slip Differential Worm Positraction Dana 30 Front 27 Spline 3.73 & Up (SL D30-4-27-LSD)

**Brand:** usa standard gear
**Price:** ₨334339
**Availability:** ✅ In Stock

## Summary

> 🚀 Unlock unstoppable traction and dominate every terrain with Spartan precision!

## Quick Answers

- **What is this?** USA Standard Gear Spartan Locker Helical Limited Slip Differential Worm Positraction Dana 30 Front 27 Spline 3.73 & Up (SL D30-4-27-LSD) by usa standard gear
- **How much does it cost?** ₨334339 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/312280875-usa-standard-gear-spartan-locker-helical-limited-slip-differential-worm)

## Best For

- usa standard gear enthusiasts

## Why This Product

- Trusted usa standard gear brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Fit for Dana 30 Front Axles:** Optimized 27 spline and 3.73+ gear ratio for seamless compatibility and peak drivetrain performance.
- • **Effortless, Maintenance-Free Operation:** Experience smooth, linear traction with zero upkeep—focus on the adventure, not the wrenching.
- • **Unmatched Durability with Forged 8620 Chromoly:** Built with premium forged steel alloy case and internals engineered to withstand the harshest off-road conditions.
- • **Quiet and Smooth Engagement for Confident Driving:** Unlike clunky lockers, enjoy whisper-quiet operation and seamless power transfer every time.
- • **Superior Traction via 10-Pinion Helical Worm Gear:** More contact points mean better load distribution and reliable grip on mud, gravel, snow, or rain.

## Overview

The USA Standard Gear Spartan Locker Helical Limited Slip Differential is a high-performance Dana 30 front differential upgrade featuring a 27 spline, 3.73+ gear ratio fitment. Crafted from forged 8620 chromoly steel alloy, it delivers superior durability and smooth, maintenance-free traction through a 10-pinion helical worm gear design. Engineered for quiet, reliable engagement, this differential enhances vehicle control and grip across diverse terrains, making it the ultimate choice for off-road enthusiasts and professionals seeking dependable drivetrain performance.

## Description

Increase the traction capability of your Dana 30 front diff with the Spartan Helical LSD from USA Standard Gear's Spartan Locker brand. This helical gear design provides years of maintenance-free service. When wheel slippage occurs, its pre-loaded worm gears funnel more power to the tire with the best traction. This 10-pinion USA Standard Gear design has a strength advantage over an equivalently sized 6-pinion or 8-pinion unit because it has more points of contact and more surface contact area to deliver optimal load distribution.Compared to other types of limited slip differentials or positraction units, the Spartan Helical LSD provides smoother engagement, quieter operation, and requires no maintenance. Built tough, the Spartan Helical LSD is a fully assembled unit featuring a forged 8620 chromoly case and stout 8620 chromoly alloy internals for superior durability. Whether you’re facing mud, loose gravel, or steep inclines on the trail or slippery snow or rain on the road, the Spartan Helical LSD will ensure you have unrivalled traction and supreme confidence in your vehicle.USA Standard Gear sets the standard for quality OE replacement parts at affordable pricing. USA Standards provides the widest selection of drivetrain replacement parts, including ring & pinions, axles, Perfect Fit driveshafts, transmission and transfer case components, and installation kits, as well as the Spartan Locker – the toughest lunchbox locker on the market. Designed for the general installer and do-it-yourself customer, USA Standard provides unmatched reliability in replacement drivetrain products.

Review: Was an easy install, running nice and quiet with Revolution gear 4.88's and the Timpken install kit. Seems to be a quality part made in the USA. Only have around 500 miles on it at the moment, will update my review in the future after some proper wheeling trips and real miles.
Review: Cheaper option than an equivalent Eaton, ( trutrac) hope it does the same job

## Features

- FITMENT: Dana 30 Front 27 Spline, 3.73+ Ratio
- METALLURGY: Forged 8620 Steel Alloy Case and Internals for Superior Durability.
- SMOOTH TRACTION: Smooth Engagement and Linear Traction
- MAINTENANCE FREE: Maintenance Free, No Worry Performance
- GEAR OIL: Recommended Gear Oil: Use Non-Synthetic 80w-90 gl-5. Use of Friction Modifiers Not Recommended

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Spartan Locker |
| Brand | USA Standard Gear |
| Model | Spartan Locker Helical Worm Gear Limited Slip Differential for Dana 30 27 Spline 3.73 & Up |
| Package Dimensions | 23.09 x 21.59 x 21.59 cm; 6.74 kg |
| Item model number | SL D30-4-27-LSD |
| Exterior | Machined |
| Manufacturer Part Number | SL D30-4-27-LSD |
| Special Features | FITMENT: Dana 30 Front 27 spline, 3.73-and-up ratio, GEAR OIL: Recommended gear oil: Non-synthetic 80W-90 GL-5. Use of friction modifiers not recommended, MAINTENANCE FREE: Maintenance free, no worry performance, METALURGY: Forged 8620 chromoly case, 8620 chromoly alloy internals for superior durability, SMOOTH TRACTION: Smooth engagement and linear traction |
| Item Weight | 6.74 Kilograms |

## Images

![USA Standard Gear Spartan Locker Helical Limited Slip Differential Worm Positraction Dana 30 Front 27 Spline 3.73 & Up (SL D30-4-27-LSD) - Image 1](https://m.media-amazon.com/images/I/71aiQDYLYFL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by L***O on 29 October 2025*

Was an easy install, running nice and quiet with Revolution gear 4.88's and the Timpken install kit. Seems to be a quality part made in the USA. Only have around 500 miles on it at the moment, will update my review in the future after some proper wheeling trips and real miles.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 17 June 2023*

Cheaper option than an equivalent Eaton, ( trutrac) hope it does the same job

### ⭐⭐⭐⭐⭐ Review
*by A***A on 14 August 2023*

Lo puse para mi Cherokee que uso para rutas de dificultad moderada pero en lugares donde solía batallar más cuando pierdes tracción en dos ruedas, te ayuda a seguir avanzando lo suficiente en la mayoría de los casos para volver a tener tracción, solamente aplico el freno para activarlo y hasta ahora me ha funcionado muy bien!

## Frequently Bought Together

- Spartan Locker Helical Limited Slip Differential Worm Gear Positraction Dana 30 Front 27 Spline 3.73 & Up (SL D30-4-27-LSD)
- Yukon Gear & Axle (YK D30-F) Front Master Overhaul Kit for Dana 30 Axle

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-02-26*