---
product_id: 390427738
title: "USA Standard Gear Spartan Locker for Dana 30 diff, 27 Spline, Includes Heavy-Duty Cross pin Shaft"
brand: "usa standard gear"
price: "₩1177260"
currency: KRW
in_stock: false
reviews_count: 5
category: "Usa Standard Gear"
url: https://www.desertcart.kr/products/390427738-usa-standard-gear-spartan-locker-for-dana-30-diff-27
store_origin: KR
region: South Korea
---

# 27 spline axle compatibility 9310 steel heat-treated precision teeth Easy drop-in installation USA Standard Gear Spartan Locker for Dana 30 diff, 27 Spline, Includes Heavy-Duty Cross pin Shaft

**Brand:** usa standard gear
**Price:** ₩1177260
**Availability:** ❌ Out of Stock

## Summary

> 🚙 Unlock unstoppable traction with Spartan precision!

## Quick Answers

- **What is this?** USA Standard Gear Spartan Locker for Dana 30 diff, 27 Spline, Includes Heavy-Duty Cross pin Shaft by usa standard gear
- **How much does it cost?** ₩1177260 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.kr](https://www.desertcart.kr/products/390427738-usa-standard-gear-spartan-locker-for-dana-30-diff-27)

## 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

- • **Effortless Installation:** Revolutionary spring and pin design allows quick, tool-friendly drop-in installation—no special skills required.
- • **Seamless Fit & Function:** Designed specifically for Dana 30 differentials with 27 spline axles, ensuring perfect compatibility and smooth operation.
- • **Automatic Traction Mastery:** Innovative locking mechanism delivers superior off-road grip by powering both wheels, conquering tough terrains with confidence.
- • **Break-In Benefits & Longevity:** Optimizes performance after initial 1000 miles break-in, rewarding you with quieter, smoother drives and extended drivetrain life.
- • **Precision Engineered Strength:** Crafted from heat-treated 9310 steel for unmatched durability and performance under pressure.

## Overview

The USA Standard Gear Spartan Locker is a high-performance automatic locker for Dana 30 differentials with 27 spline axles. Made from heat-treated 9310 steel and featuring a unique spring and pin design, it offers easy drop-in installation and reliable traction by locking both wheels under load. Ideal for off-road enthusiasts seeking enhanced grip and durability, it requires a break-in period for optimal smoothness and demands attentive tire maintenance for best on-road handling.

## Description

The Spartan Locker, by USA Standard Gear, provides reliable traction at a low cost. The Spartan locker's design does not use the thrust washers and has a revolutionary spring and pin design that makes installation a snap!This automatic locker replaces the stock side and pinion gears while utilizing the factory open differential case. A new and stronger center pin fits in oval slots between two inner drivers. Under load the center pin forces the inner drivers outward to engage the outer axle couplers on each side of the case. This provides locked power to both drive wheels, providing greater traction. When turning, one driver is unloaded and the teeth can ratchet across each other creating differential action to reduce tire wear and make turning the vehicle easier. This is one of the most economical lockers on the market today.

Review: This is a very nice locker. it works very well and installs easily with hand tools and no special tools, knowledge or equipment. (you just need a torque wrench, sockets a punch for the roll pin) Offroad this thing is amazing and will pull your jeep over things that were impossible before. However on-road this is VERY sensitive to tire pressure. Make sure you rotate your tires often and monitor tire pressure frequently. even 1-2 PSI is enough for it to act squirrely. This is especially noticeable for the first 1000 miles. During break in even in 2wd with the locker in in a front differential, It can lock up and make the jeep hard to handle. After it gets worn in - it works like a dream but if you put it in right before winter you will struggle. During break in the unlocks are LOUD -almost like a bang. You will get looks in parking lots where people think you broke something. The steering is much tighter in 4wd then before you put this locker in and it will not turn as tightly in 4wd. Offroad in 4lo with this in the front dana 30 you will have to make more multi point turns (or get a terra 2w low kit for your np231 so you can shift in and out of 2w/4w low on the fly to get the front to unlock) The TJ i put this in didn't work right until i ran it through a couple tanks of gas and flat towed it at 65 for about 650 miles - then it was good to go. In the YJ i put this in it wasn't "right" with the world until just after 1000 miles This does have some negative driving characteristics in 4wd as well. If it's icy you need to be very careful - if you have this in the front axle it will understeer and the locker will not always differentiate because it needs that friction with the road to do so. you will find yourself putting more and more wheel into a turn and then when it finally unlocks it will get squirrely. It will also understeer and is much more likely to loose lateral control in the ice. If you put one of these In the rear it will torque steer (pushing you in a straight line) for as long as you are on the gas. If you don't watch it closely you WILL do unintentional lane changes or donuts when its icy out on the road. Do not just toss the keys to your buddy who doesn't know how to drive an auto locker in in a light vehicle when its shitty out. It will take some time to learn to drive it, you drive allot with your foot - you learn to let off around curves, lane changes etc. Make sure to give yourself some time to adjust to how to drive one of these on the road. Spend some parking lot and back road time with it when its crappy out until you get used to it. When shifting out of 4wd the jeep will have a tendency to not unlock the front axle. If you let it roll with the trans in neutral and turn the wheel back and forth a bit it helps. This gets much much better after you break it it (that first 1000 or so) Finally if you didn't pay attention to the tire size limits - you are much more likely to break axle shafts with larger tires with one of these. Make sure you know out to pound out a u-joint or pull and inner CV . I didn't start breaking things until i went over 33s then it was quite often until i went to 4340 chromoly shafts. The inners are what tend to break on stock shafts and the CV cups blow up on the ZJ shafts. basically take your time, learn to drive it, keep in mind of the limitations and dont judge it until you have that first 1000 or so on it and enjoy the massive off-road advantages
Review: I have one in my Dana 30 and this one in my 60, easy assembly and great function

## Features

- Easy, drop-in installation
- Made from 9310 steel
- Heat treated and precision cut teeth
- Fits Dana 30 differential with 27 spline axles

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B007N3P9DA |
| Assembly Required | No |
| Back Material Type | Alloy Steel |
| Base Type | Spline |
| Brand | USA Standard Gear |
| Colour | Silver |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,638) |
| Date First Available | 7 August 2013 |
| Door Style | Slab |
| Exterior | Metallic Finish |
| Finish Type | Powder Coated |
| Frame Material | Metal |
| Handle Material | Metal |
| Installation Type | Freestanding |
| Item Weight | 2 kg 110 g |
| Item model number | SL D30-27 |
| Manufacturer | USA Standard Gear |
| Manufacturer Part Number | SL D30-27 |
| Material | Steel |
| Model | SLD30-27 |
| Mounting Type | Floor Mount |
| Net Quantity | 1.0 Count |
| Number of Compartments | 4 |
| OEM Part Number | SLD3027 |
| Outer Material | Steel |
| Recommended Uses For Product | Automotive |
| Room Type | Living Room |
| Size | Dana 30 differential - 27 spline axles |
| Special Feature | Lockable |
| Special Features | Lockable |
| Top Material Type | Steel |
| Weight Limit | 60 Kilograms |

## Product Details

- **Brand:** USA Standard Gear
- **Colour:** Silver
- **Door Style:** Slab
- **Finish Type:** Powder Coated
- **Material:** Steel
- **Mounting Type:** Floor Mount
- **Recommended Uses For Product:** Automotive
- **Room Type:** Living Room
- **Special Feature:** Lockable
- **Weight Limit:** 60 Kilograms

## Images

![USA Standard Gear Spartan Locker for Dana 30 diff, 27 Spline, Includes Heavy-Duty Cross pin Shaft - Image 1](https://m.media-amazon.com/images/I/412V2lWfsWL.jpg)
![USA Standard Gear Spartan Locker for Dana 30 diff, 27 Spline, Includes Heavy-Duty Cross pin Shaft - Image 2](https://m.media-amazon.com/images/I/519v9zDNG2L.jpg)
![USA Standard Gear Spartan Locker for Dana 30 diff, 27 Spline, Includes Heavy-Duty Cross pin Shaft - Image 3](https://m.media-amazon.com/images/I/51BPyyfu05L.jpg)
![USA Standard Gear Spartan Locker for Dana 30 diff, 27 Spline, Includes Heavy-Duty Cross pin Shaft - Image 4](https://m.media-amazon.com/images/I/51kcKbeJDOL.jpg)
![USA Standard Gear Spartan Locker for Dana 30 diff, 27 Spline, Includes Heavy-Duty Cross pin Shaft - Image 5](https://m.media-amazon.com/images/I/51yk+MSPWSL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Will these fit my 1995 jeep wrangler yj?  should i put them on the front, back, or both?**
A: Yes this will work very well in your front High pinion Dana 30.    

You would need a different locker for the rear Dana 35 in your YJ but i would personally not put an auto locker in it.  You will break the dana35 easily.  

if you really want a locker for the rear - consider swapping the axle for a ford 8.8 or even a  dana 44 out of a waggoneer

**Q: will this work on my 87 xj?**
A: Yes, this locker will work GREAT as long as you have the Dana 44 Rearend.Let me know if you have any other questions.Thanks,BRYDON641-751-8060staticz2229@gmail.com

**Q: Will this fit my 2007 Jeep Unlimited with Dana 44 rear axle with no additional shims or parts?**
A: Yes this should fit in your 44 using the same shims you already have in there.  This will pop considerably on pavement in your rear diff.  I have it in my front and it behaves like an open diff when in 2wd.  It locks up in 4wd and becomes stiffer to steer but climbs rocks much better.  I have the D-30 front.

**Q: Does this locker make noise on tight turns?**
A: Yes, all lunch box type lockers make a clicking noise on turns.  On slow tight turns you may occasionally hear and feel a loud banging.  I have this locker in my front D30 and while turning into a parking space I turn slowly and don't accelerate while doing this type of turning. As others have said, it's normal.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by C***S on 6 January 2022*

This is a very nice locker. it works very well and installs easily with hand tools and no special tools, knowledge or equipment. (you just need a torque wrench, sockets a punch for the roll pin) Offroad this thing is amazing and will pull your jeep over things that were impossible before. However on-road this is VERY sensitive to tire pressure. Make sure you rotate your tires often and monitor tire pressure frequently. even 1-2 PSI is enough for it to act squirrely. This is especially noticeable for the first 1000 miles. During break in even in 2wd with the locker in in a front differential, It can lock up and make the jeep hard to handle. After it gets worn in - it works like a dream but if you put it in right before winter you will struggle. During break in the unlocks are LOUD -almost like a bang. You will get looks in parking lots where people think you broke something. The steering is much tighter in 4wd then before you put this locker in and it will not turn as tightly in 4wd. Offroad in 4lo with this in the front dana 30 you will have to make more multi point turns (or get a terra 2w low kit for your np231 so you can shift in and out of 2w/4w low on the fly to get the front to unlock) The TJ i put this in didn't work right until i ran it through a couple tanks of gas and flat towed it at 65 for about 650 miles - then it was good to go. In the YJ i put this in it wasn't "right" with the world until just after 1000 miles This does have some negative driving characteristics in 4wd as well. If it's icy you need to be very careful - if you have this in the front axle it will understeer and the locker will not always differentiate because it needs that friction with the road to do so. you will find yourself putting more and more wheel into a turn and then when it finally unlocks it will get squirrely. It will also understeer and is much more likely to loose lateral control in the ice. If you put one of these In the rear it will torque steer (pushing you in a straight line) for as long as you are on the gas. If you don't watch it closely you WILL do unintentional lane changes or donuts when its icy out on the road. Do not just toss the keys to your buddy who doesn't know how to drive an auto locker in in a light vehicle when its shitty out. It will take some time to learn to drive it, you drive allot with your foot - you learn to let off around curves, lane changes etc. Make sure to give yourself some time to adjust to how to drive one of these on the road. Spend some parking lot and back road time with it when its crappy out until you get used to it. When shifting out of 4wd the jeep will have a tendency to not unlock the front axle. If you let it roll with the trans in neutral and turn the wheel back and forth a bit it helps. This gets much much better after you break it it (that first 1000 or so) Finally if you didn't pay attention to the tire size limits - you are much more likely to break axle shafts with larger tires with one of these. Make sure you know out to pound out a u-joint or pull and inner CV . I didn't start breaking things until i went over 33s then it was quite often until i went to 4340 chromoly shafts. The inners are what tend to break on stock shafts and the CV cups blow up on the ZJ shafts. basically take your time, learn to drive it, keep in mind of the limitations and dont judge it until you have that first 1000 or so on it and enjoy the massive off-road advantages

### ⭐⭐⭐⭐⭐ Review
*by S***9 on 30 September 2022*

I have one in my Dana 30 and this one in my 60, easy assembly and great function

### ⭐⭐⭐⭐⭐ Review
*by C***. on 22 May 2023*

Excelente producto, de muy buena calidad y a un precio accesible, funciona de manera excelente, se la instalé a mi Jeep Cherokee y ahora tiene más fuerza, agarre y fricción en su trabajo de eje traseroz ahora puedo ir a lugares donde antes no me era posible acceder cuando los ejes no eran positivos, 100% recomendado

## Frequently Bought Together

- USA Standard Gear Spartan Locker for Dana 30 Differential 27 Spline (SL D30-27)
- Dana 30 Differential Cover Gasket D030
- MG21103 Dana 30/44 Front Axle Tube Seal Pair For Jeep Wrangler JK JKU 2007-2018, YJ 1987-1995, TJ 1997-2006, LJ 2004-2006, Cherokee (XJ) 1984-2001, Grand Cherokee (ZJ) 1993-2001 (2PCS Red)

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*Product available on Desertcart South Korea*
*Store origin: KR*
*Last updated: 2026-02-05*