F9666LW PEM Ring Pinion Spline Kit Ford

Review PEM Ring And Pinion Lightweight 6.66 Ratio Spline Ford In Kit for FORD 2028

The PEM F9666LW Ring Pinion is a high-quality replacement component designed for Ford vehicles with a 6.66 ring gear and a 28 spline output shaft. This ring pinion is an essential part of the differential assembly, responsible for transmitting torque from the engine to the drive wheels.

The F9666LW Ring Pinion is manufactured using precision machining techniques to ensure a perfect fit and optimal performance. It features a hardened and ground tooth surface for improved durability and longer service life. The tooth profile is designed to provide smooth and efficient power transfer, reducing wear and tear on other drivetrain components.

This ring pinion is also engineered to meet or exceed OEM specifications, ensuring reliable and consistent operation. It is made from high-strength steel, which provides the necessary strength and rigidity to handle the loads and stresses encountered during normal driving conditions.

The 28 spline output shaft interface of this ring pinion is designed to mate perfectly with the corresponding spline on the Ford differential. The splines provide a positive connection between the ring pinion and the differential, ensuring that power is transmitted efficiently and without any slippage.

The PEM F9666LW Ring Pinion is suitable for use in various Ford applications, including but not limited to, F-150, Expedition, and Super Duty models. It is important to note that the specific application may vary depending on the year, make, and model of the vehicle. Therefore, it is recommended to verify the compatibility of this ring pinion with your specific Ford vehicle before installation.

Installing the PEM F9666LW Ring Pinion involves removing the old ring pinion, cleaning the differential housing, installing the new ring pinion, and reassembling the differential. It is recommended to consult the vehicle's service manual or seek professional assistance to ensure a proper installation.

In summary, the PEM F9666LW Ring Pinion is a high-quality replacement component designed for Ford vehicles with a 6.66 ring gear and a 28 spline output shaft. It is manufactured using precision machining techniques, hardened and ground tooth surface, and high-strength steel to ensure optimal performance, durability, and reliability. It is important to verify the compatibility of this ring pinion with your specific Ford vehicle before installation.

Buying a new ring and pinion gearset, such as the PEM F9666LW 6.66:1 28 spline kit for Ford applications, can be a significant investment for automotive enthusiasts and mechanics. Here are some potential pros and cons to consider before making a purchase.

1. Improved Performance: A new ring and pinion gearset can lead to better performance by improving the overall gear ratio of your drivetrain. This can result in increased torque, horsepower, and acceleration.

2. Better Fit and Function: A new gearset can provide a better fit and function than an old or worn-out one. This can help reduce vibrations, noise, and potential damage to other drivetrain components.

3. Increased Durability: A new ring and pinion gearset is typically more durable than an old or worn-out one. This can help reduce the need for frequent repairs and replacements.

4. Enhanced Drivability: A new gearset can provide smoother and more consistent shifting, resulting in better drivability and a more enjoyable driving experience.

1. Cost: A new ring and pinion gearset can be a significant investment, especially for high-performance applications.

2. Installation Complexity: Installing a new ring and pinion gearset can be a complex and time-consuming process. It typically requires specialized tools and knowledge.

3. Potential for Damage: During installation, there is a risk of damaging other drivetrain components if the installation is not done correctly.

4. Potential for Noise: A new ring and pinion gearset can sometimes produce more noise than an old one, especially when first installed.

A new ring and pinion gearset, such as the PEM F9666LW 6.66:1 28 spline kit for Ford applications, can provide significant performance and durability benefits. However, it comes with a significant investment and installation complexity. If you are planning to use your vehicle for high-performance applications or if you are experiencing issues with your current gearset, then a new ring and pinion gearset may be a worthwhile investment. However, if you are on a tight budget or if the installation complexity is a concern, then it may be worth considering other options, such as rebuilding your current gearset or using a lower-performance aftermarket gearset. Ultimately, the decision to purchase a new ring and pinion gearset depends on your individual needs and circumstances.

Details:

Ring and pinion - lightweight 6.66 ratio 28 spline Ford 9 in kit. Manufacturer: Pem.

specifications differentialsdepo:

• for makes: Ford
• for years: 2028
• brand: Pem
• mpn: F9666lw
• type: Ring And Pinion Gears
• manufacturer warranty: Yes

payments differentialsdepo:

• other
• wallet: apple-pay
• credit card: discover

returns differentialsdepo:

• policy: returns accepted
• time: 30 days
• paid by: seller

seller differentialsdepo:

• rating: 99.8%
• # reviews: 118087
• city: san leandro, california

general differentialsdepo:

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

shipping differentialsdepo:

• class: standard
• transit: 3-6 days
• type: fixed
• service: standard

offer differentialsdepo:

• availability: in stock
• sold #: 11
• prices: $315.13–$389.02
• item condition: New
• options: ship-to-home
• started: january 4, 2026
• in stock #: 5