187SL13A DETROIT Locker Spline Ring Pinion Ford

Review DETROIT #187sl13a. Ford Inch Locker Spline 410 Ring And Pinion for FORD 2028

The Detroit 187SL13A Ford Locker is a high-performance differential unit designed for heavy-duty applications. This locker is engineered specifically for Ford vehicles with a 28 spline 410 ring pinion.

The Detroit 187SL13A is a spool-type locker, meaning it provides maximum traction by locking the differential gears together under all conditions. It's particularly suitable for off-road driving, towing, and other high-torque applications where power delivery to the wheels is crucial.

This locker features a robust, forged steel housing that can withstand the rigors of extreme use. The gears inside are made from heat-treated, chrome-molybdenum steel, ensuring strength and durability even under heavy loads. The locking mechanism is designed for smooth engagement and positive lockup, providing reliable performance in challenging conditions.

The 187SL13A also includes a built-in bypass valve, which allows for some degree of axle articulation while maintaining traction. This feature helps minimize wheel hop and improve overall handling. The locker is also compatible with Detroit's Automatic Locking Differential (ALD) system, which provides an automatic, infinitely variable locking action for optimal traction in a wide range of driving conditions.

Installation of the Detroit 187SL13A Ford Locker is relatively straightforward, requiring only standard differential installation procedures. However, it's recommended that the installation be performed by a professional mechanic to ensure proper alignment and setup. The locker is also compatible with various aftermarket gear sets, allowing for customization of the final drive ratio to suit specific vehicle applications.

In summary, the Detroit 187SL13A Ford Locker is a high-performance, heavy-duty differential unit designed specifically for Ford vehicles with a 28 spline 410 ring pinion. Its robust construction, smooth locking mechanism, and built-in bypass valve make it an ideal choice for off-road driving, towing, and other high-torque applications.

A Detailed Analysis of Buying a Detroit Lockner 187SL13A Ford Locker for a 410 Ring Pinion

The Detroit Locker 187SL13A is a popular choice for those looking to add a limited-slip differential to their Ford vehicles. This locker is designed for use with a 28 spline ring pinion and is a great option for those seeking improved traction and better handling. In this analysis, we will discuss the pros and cons of buying this particular locker, ending with a conclusion and recommendation.

1. Improved Traction: A Detroit Locker helps to distribute power evenly between the wheels, which can significantly improve traction in slippery conditions.

2. Better Handling: By providing improved traction, a Detroit Locker can lead to better handling and stability, especially when cornering.

3. Durability: Detroit lockers are known for their robustness and longevity, making them a popular choice for off-road and high-performance applications.

4. Easy Installation: The 187SL13A model is designed for easy installation, with no need for drilling or other modifications to the housing.

1. Cost: Detroit Lockers can be more expensive than other aftermarket limited-slip differentials, which may be a deterrent for some buyers.

2. Noise: Some users report that the Detroit Locker produces a noticeable noise, especially during hard acceleration or when turning.

3. Maintenance: The Detroit Locker does require regular maintenance, including periodic lubrication and adjustment of the preload.

4. Limited Compatibility: The 187SL13A model is only compatible with Ford vehicles that use a 28 spline ring pinion, which may limit its appeal to some buyers.

The Detroit Locker 187SL13A offers several advantages, including improved traction, better handling, durability, and easy installation. However, it also comes with some drawbacks, such as cost, noise, maintenance requirements, and limited compatibility. Ultimately, the decision to purchase this locker depends on your specific needs, budget, and the compatibility with your vehicle.

If you are looking for a high-performance limited-slip differential for your Ford vehicle that uses a 28 spline ring pinion and can accommodate the cost, the Detroit Locker 187SL13A is an excellent choice. It offers superior traction and handling, as well as the durability and ease of installation that Detroit Lockers are known for. However, if budget is a concern or you're looking for a quieter option, you may want to consider alternative limited-slip differentials.

Details:

Ford 9 rear with 410 gear and pinion came out of my cobra reason for pulling was I needed a 355 this is good unit.

specifications differentialsdepo:

• for makes: Ford
• for years: 2028
• brand: Detroit
• mpn: 187sl13a
• part type: Ring Pinion
• items included: Locker
• bore diameter: 9 In
• country of origin: United States

seller differentialsdepo:

• # reviews: 772
• city: currituck, north carolina
• rating: 100.0%

general differentialsdepo:

• category: Auto Parts > Transmission Drivetrain > Differentials, Assemblies > Additional

payments differentialsdepo:

• credit card: mastercard
• other
• wallet: google-pay

returns differentialsdepo:

• policy: no returns

offer differentialsdepo:

• sold #: 10
• options: ship-to-home
• best offers: true
• in stock #: 4
• availability: in stock
• started: may 31, 2026
• prices: $393.42–$1510.64
• item condition:
  • Remanufactured
  • New
  • Brand New
  • Used

shipping differentialsdepo:

• service: usps ground advantage
• transit: 4-9 days
• carrier: usps
• type: fixed
• class: standard