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Top 08 Best Spartan Locker Review 2021 [User Buying Guide & FAQs]

You may have wondered if there was a way to improve the driving of your vehicle. Throughout this Spartan locker review, you will find the solution to this question.

It is ubiquitous to encounter many inconveniences along a road when driving.

In particular, patches of ice, mud, or a wet road can be a drawback to a vehicle’s wheels. When you encounter one of these drawbacks, the wheels may spin out of control and asymmetrically.

Spartan Locker Review

Photo Title Buy
USA Standard Gear...image USA Standard Gear (SL D44HD-30) Spartan Locker for Dana 44HD Differential with 30 Spline Axles Check On Amazon
USA Standard Gear...image USA Standard Gear Spartan Locker for ford 8.8 Differential 31 Spline (SL F8.8-31) Check On Amazon
USA Standard Gear...image USA Standard Gear (SL C8.25-29) Spartan Locker for Chrysler 8.25 Differential with 29 Spline Axles Check On Amazon
USA Standard Gear...image USA Standard Gear (SL M35-1.5-27) Spartan Locker for Model 35 Differential with 27 Spline Axles & 1.560 carrier Check On Amazon
USA Standard Gear...image USA Standard Gear SL GM12-30 GM 12 Bolt differential-30 Spline axles Spartan Locker Check On Amazon
USA Standard Gear...image USA Standard Gear Spartan Locker for Dana 30 Differential 27 Spline (SL D30-27) Check On Amazon
USA Standard Gear...image USA Standard Gear (ZK D30-F) Master Overhaul Kit for Dana 30 Front Differential Check On Amazon
USA Standard Gear...image USA Standard Gear (SL SUZSAM) Spartan Locker for Suzuki Samurai differential with 26 spline axles Check On Amazon

Top 08 Best Spartan Locker Review 2021

Thus, the Spartan lockers not only solve these problems, they provide a safer ride. However, there are a lot of different lockers on the market today.

That is why we have researched for you, and we describe the best options below.

In a few simple steps, your vehicle will have a better performance. 

01. USA Standard Gear Spartan Locker SL for Dana D44HD-30 with 30 Spline Axles

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One of the best components to optimize the functionality of your vehicle is this option. It is a locker that is perfectly compatible with the Dana Spicer 44HD, including 30 spline axles.

So only by installing this part, you will get a much more appropriate vehicle driving. That is why it is important to mention the rest of its features.

High-Quality Materials

Only highly durable and resistant materials are used to manufacture these parts. In particular, steel 9310 is used here to provide an extended service life.

Thus, your vehicle will have one of the most extended services lives about other components.

Simple Installation

To install this component, you do not need to have too much specific knowledge. Even though a few simple steps, you will start to have this new locker in your vehicle.

In the same way, you will not need to hire a professional to perform this task. That is why the time needed is not very long.

High-Level Traction

In particular, this component will allow you to obtain more traction power for your vehicle. You even can remove the spider gears from your vehicle by this part.

In this way, it will be much easier to drive on the most difficult roads. This means that you will have the necessary traction on wet, icy, or muddy roads.


  • Made of steel 9310
  • Short and easy installation
  • High-level design


  • Intermediate functionality 

02. USA Standard Gear Easy Drop-in Installation Spartan Locker Ford 8.8 Differential with 31 Spline Axles

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Another option that can provide excellent performance is this particular part. Here, in this Spartan locker review you will get correct compatibility with Ford 8.8 in the differential with 31 axle keys.

Along with this, high quality and performance are also included.

Heavy-Duty Metal

If you wish to obtain a high level of resistance, this component can be offered to you. Here 9310 steel has been used to manufacture this component.

This is why you will get an excellent level of durability for the most intensive uses.

Proper Installation Process

Additionally, it is important to mention that the design is intended to provide easy installation. It won’t even take you long to start using this new part.

In particular, the drop-in design will prevent you from wasting too much time or hiring a professional.

Excellent Functionality

Once you install this piece, you can count on a higher level of traction. So this means that the drive wheels will get superior performance on the toughest roads.

These are important for both heavy use and everyday driving.


  • Quick and easy installation
  • High strength steel
  • Superior traction power


  • Only for Ford 8.8 

03. USA Standard Gear High Quality Spartan Locker Chrysler 8.25 Differential with 29 Spline Axles

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In case you need the exact part for Chrysler 8.25 inches, this component is ideal. Even the compatibility covers the differential with 29 spline axles.

In the same way, you will avoid spending more money on future maintenance, due to the excellent resistance of this part.

Steel 9310

As with previous models, one of the highest levels of resistance is included here. In particular, 9310 steel avoids the need for too much maintenance on your vehicle.

This means less money for you to spend overall.

Short Installation Time

As it could not be otherwise, the installation process is very simple to perform by any user. You won’t waste any time on it thanks to the drop-in design.

In the same way, you will have the possibility to replace the spider gears and obtain superior performance.

Increased Traction

The main benefit here is the increased traction power obtained by the wheels of your vehicle’s axle. As in the previous cases, this provides you with greater safety while driving.

Whether you have to turn or drive straight ahead, this component is adapted to every situation.


  • Drop-in installation
  • Steel 9310
  • High-level design


  • Intermediate life 

04. USA Standard Gear Easy Drop-in Installation Spartan Locker for Model 35 Differential with 27 Spline Axles & 1.560 Carrier

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Here we have another component that can be adapted to different vehicle models to provide a good result. In this case, the compatibility is with model 35 and differential with 27 spline axles.

Of course, other features we have mentioned above are also included.

High Strength Metal

Here too, you can take advantage of this component made of 9310 steel. In particular, this metal provides you with a longer life and safer use of your vehicle.

So, when you install this part, you will be able to forget about future damages or flaws in any component.

Drop-in Installation

Additionally, here too Spartan Locker includes the drop-in design. So, you will notice that in a very short time, this component will be installed in the axle of your vehicle.

After that, the traction you can get can be adapted to a large number of situations.

Excellent Functionality

At this point, due to the excellent design and strength of this component, you will get superior functionality. So, in a few simple steps, your vehicle’s traction can be adapted to a large number of difficult or easy roads.

This is why it is an excellent investment.


  • High-value design
  • High level of resistance
  • Superior traction power


  • Compatible for some vehicles only

05. USA Standard Gear Fits GM 12 Bolt Passenger Car or Truck Spartan Locker GM 12 Bolt Differential-30 Spline Axles

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As we continue to investigate the excellent components, this Spartan locker review is another one. In this case, the compatibility is with GM 12 volt trucks and passenger cars.

This in turn also includes 30 spline axles. In other words, it is one of the best investments for a vehicle.

High Durability and Resistance

As mentioned above, 9310 steel is also used here. So this component gives you one of the highest levels of strength and durability. So this gives you superior functionality, combined with minimal maintenance.

Installation on the Spot

Just as it is for a Spartan Locker here you will not spend much time on the installation process either. The drop-in installation allows you to spend your time enjoying the new functionality of your vehicle.

High Level of Traction

Here, precision cutting and heat-treated teeth offer superior functionality for your vehicle. So regular and irregular roads will not be a problem when driving.

Of course, this provides a safer and more enjoyable drive.


  • Steel 9310
  • Drop-in installation
  • Top drive


  • Minimum knowledge required 

06. USA Standard Gear High Quality Spartan Locker Dana 30 Differential with 27 Spline (SL D30-27)

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When we mention another excellent component for various users, we mean this model. Here the compatibility is with Dana 30 and a differential 27 spline count. Along with this, of course, the rest of the above positive features are also included.

Highly Resistant Metal

To continue to provide the best performance, the same metal has been used here. Each of these components is made of 9310 steel. This makes the resistance level obtained one of the highest, which reduces the probability of damage.

Short and Easy Installation

Once again, the installation process will be very simple for a large number of users. In particular, the type of drop-in installation will prevent you from spending too much time on this initial process.

This is why it is one of the best options available on the market today.

More Traction Power

On top of that, your vehicle will have more power on the drive wheels. As we have mentioned, this is especially important on icy or muddy roads. Therefore, your vehicle’s wheels will get the power they need in every situation.


  • Increased traction power
  • Quick and easy installation
  • High strength steel


  • Standard design

07. USA Standard Gear Spartan Locker Nissan Patrol Differential-31 Spline Axles with Spartan Locker

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If your vehicle is a Nissan brand, then this model will be the ideal one for you. In particular, compatibility with Nissan Patrol differential 31 spline count.

So improving the traction performance of your vehicle is just a few steps away.

High Level of Endurance

To reduce the necessary maintenance, this component is built with steel 9310. Therefore, this reduces the probability of corrosion or excessive wear in intense use.

So, you get a safer drive.

Simple Installation

Any user who wishes to install this component should know that the drop-in installation design is the most appropriate. Here none of them will waste too much time in the assembly of this part.

After a few steps, your vehicle will be ready to go out again.

More Traction Power

After replacing your current spider gears, this component provides a safer drive. As we have mentioned, this is necessary for rough and difficult roads.

Therefore it is one of the best investments today.


  • Steel 9310
  • Highly functional design
  • Excellent traction power


  • Only compatible with Nissan

08. USA Standard Gear High Quality Easy Drop-in Installation Spartan Locker Suzuki Samurai Differential with 26 Spline Axles

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Last but not least, users with a Suzuki will benefit. Here the compatibility is with Suzuki Samurai 26 spline count differential. So the driving obtained will be safer and superior in these vehicles.

High-Level Steel

Once again, here too 9310 steel will do an excellent job at all times. In this way, you will be increasing the power and functionality of your vehicle.

At the same time, it is a component that provides an excellent service life.

Simple Installation

In this case, the heavy-duty design also provides for very easy installation. You won’t waste much time mounting this part on the axles of your vehicle.

That’s why this manages to convince a large number of users who choose this brand.

Powerful Traction

Having this component increases the traction power of your vehicle. Therefore, this will provide you with a safer drive on off-road roads. In other words, ice or mud will not be a problem for your vehicle’s wheels.


  • Steel 9310
  • Excellent resistance and durability
  • Quick and easy installation


  • Only for Suzuki Samurai

What is Spartan Locker

In particular, it is a component that works as a boot blocker. This mechanical locking unit allows you to modify your trail equipment and provide a safer ride.

This requires an installation procedure that is very simple for any type of user.

Therefore, only you need to install this part in standard support. In this simple way, you will be replacing each of the spider gears, specifically in the differential.

Together with quick and easy installation, you can obtain a much more appropriate traction power. One of the greatest benefits is obtained when the wheels touch a road of ice or mud.

Buying Considerations- Spartan Locker Review

There are some useful aspects you should consider before making a definitive choice. Each of these options provides you with different functionality in each case. That is why it is advisable to acquire the locker that best suits the needs of your vehicle.

This way, you will avoid spending money on the wrong option.

Type of Use

The same accessory cannot provide the same life span with any type of use. Therefore, it is advisable to acquire the necessary quality for your particular vehicle.

Some vehicles may require a high level of functionality.

In the same way, it is important to consider the type of traction your particular vehicle has. All these aspects have a direct influence on the life that a locker can provide.

Even experts claim that it is not possible to determine the exact lifetime of a locker model.

That is why acquiring the right component for your vehicle and your needs is essential. This way, you will avoid spending extra money on buying a new part early.

Manufacturing Materials

In conjunction with the previous point, the materials with which any vehicle component are made are important. Even in this case, the durability of the materials also has an influence.

You can get a longer life as a component that provides a higher level of durability. At the same time, this can provide superior functionality.

In the same way, the best options on the market do not require much maintenance. In turn, this superior quality allows you to protect the rest of your vehicle’s components.

Therefore, these are essential aspects to keep the maintenance costs of your vehicle to a minimum. Also, the best options can resist the most common corrosions of the material.

Installation Process

Having a vehicle component that is too difficult to install is not the best option. If this is the case, you will need too much time to get the new part.

At best, it will result in a low level of error in the car’s functionality. This is not a minor issue.

When a vehicle component is improperly installed, then performance is lower, and the chances of damage and failure increase. So the easier a part is to install, the less likely it is to make mistakes and do damage.

That is why we have considered 8 lockers that are very simple to install. So, they are a set of highly convenient options that will prevent you from wasting time.

The Specific Type of Installation

While it is possible to find difficult or easy installations, different installations can also be found. In particular, you can choose a rear or front installation.

Of course, this will depend exactly on the type of traction your vehicle has. 

The best recommendation for 4WD vehicles is to perform the installation process on the rear axle. This will give you one of the best and highest traction powers.

On the contrary, when you install this component on the opposite axle to the traction of your vehicle, you will encounter some problems. That is why it is recommended that you only purchase the component that is suitable for your vehicle’s specific traction. 


As with any other component, all market options do not require the same budget. In particular, it is important to note that the cheapest parts are not necessarily the worst.

However, do not expect to get the maximum functionality and lifetime from the cheapest component. In the same way, the most expensive lockers may not be the most functional for your particular vehicle.

That is why it is advisable to have a flexible budget to acquire the best option among those available. This is the only way you will be able to count on higher quality and safer operation for the rest of the components of your vehicle. 

Best Spartan Locker’s Must Known FAQ’s

Q: How do spartan lockers work?

Ans: These components are mainly activated when your vehicle is in operation. The axles together will lock due to the operation of this locker. In particular, this happens when you only have to travel in a straight line.

Of course, this does not happen throughout the entire trip. At the moment you need to turn the wheels of your vehicle, then this component will allow the indicated wheels to turn.

Therefore, the necessary wheels will turn faster to provide the correct steering angle on your trip. Even this component will allow useful differentiation from the internal gears.

Q: Where are spartan lockers made?

Ans: In particular, this type of component is manufactured primarily in the United States. Together with this, the trajectory and quality of the Spartan brand give users great confidence in use.

In the same way, experts recommend using these lockers for a certain class or type of vehicle. In particular, you should purchase these components if your vehicle is lightweight and has tires up to 35 inches.

Even if your vehicle is smaller than that, Spartan lockers can provide you with one of the best features. Besides, the high durability and quality of these components will prevent you from spending too much money on your vehicle’s maintenance. 

Q: What is the best locker for a daily driver?

Ans: To find the best component for a vehicle, it is necessary to consider the aspects we have listed above. This will make it easier to find the locker that best suits your needs.

Also, one of the most important aspects is the level of strength and durability of this particular component. As a locker has a higher level of resistance, then it will be more appropriate.

One of the hardest factors is the daily driving of a vehicle. So, day after day, your vehicle is exposed to possible damage and heavy use. That is why buying the best option will allow you to take care of many of your vehicle’s components. 

Q: How does a limited-slip diff work?

Ans: In particular, this feature is put to work when you drive a vehicle in a straight line. In particular, here the same torque is transmitted to both wheels, with the limited-slip diffs.

In the same way, you also get the most appropriate operation in some dangerous driving situations. Sometimes your vehicle may have too much acceleration or there is simply some mud, a patch of ice, or a loss of traction.

At these times, the wheels may turn disproportionately. So, the limited displacement differential can automatically provide more power. This way, the wheels that have traction will get more power.

Q: Is limited-slip differential worth it?

Ans: Along with this aspect, you will have a higher level of safety when driving your vehicle. Keep in mind that on ice or in mud, your vehicle’s wheels can lose control or traction.

At these times, the wheels with the vehicle’s traction will get the power needed to avoid danger. 

Final Words

When you consider all the important aspects of a Spartan locker you will be able to get the best performance. In the same way, the driving of your vehicle will be much safer and more comfortable from the first use.

In turn, you will avoid spending many hours of your time researching the best options. Instead, we recommend that you read this Spartan locker review to acquire the best component.

Once you go through the simple installation procedure, you will notice the big difference. Also, users ensure that the maintenance required for these lockers is minimal.

Therefore, this simply translates into less money needed for the general maintenance of your vehicle. Besides, this will give you more hours to enjoy a great drive.

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