91049345-31-370 SPEEDWAY MOTORS Posi Differential Member Spl

Review SPEEDWAY MOTORS Posi Differential 3rd Member 31 Spl 3.70 Gear Ratio Fits Ford Inch for FORD

The Speedway Motors 91049345-31-370 Posi Differential 3rd Member is a crucial component for enhancing the performance of your Ford vehicle's drivetrain. This 3rd member is specifically designed for use with a 3.70 gear ratio and a 31-spline output shaft.

Crafted from high-strength steel, this differential 3rd member provides superior durability and rigidity, ensuring optimal power transfer from the engine to the wheels. The Posi design of this component ensures positive engagement of the gears, reducing power loss and improving traction, especially during high-performance driving or racing conditions.

The 31-spline output shaft of this differential 3rd member is engineered to handle the increased torque demands of high-performance applications. This robust design minimizes deflection and allows for smooth power transfer to the driveshaft, resulting in improved acceleration and overall vehicle performance.

Additionally, this differential 3rd member is designed to be a direct replacement for the factory unit, making for an easy installation process. It comes fully machined and ready to be bolted into place, along with all necessary hardware included in the package.

In summary, the Speedway Motors 91049345-31-370 Posi Differential 3rd Member is an essential upgrade for Ford enthusiasts looking to boost the power and performance of their vehicle. Its high-strength steel construction, Posi design, and robust 31-spline output shaft ensure reliable and efficient power transfer, making it a must-have for any high-performance application.

The Speedway 91049345-31-370 Posi differential 3rd member 3.1 spl spline, 3.70 gear for Ford is a crucial component of a Ford differential system. This part plays a significant role in transferring engine power to the wheels and enhancing the vehicle's performance. In this analysis, we will discuss the potential pros and cons of purchasing this specific part.

1. Improved Traction: The Posi differential provides better traction by preventing the wheels from spinning differently during cornering or when one wheel encounters a slippery surface. This results in improved stability, handling, and overall vehicle performance.

2. Durability: The third member of the differential is a critical structural component, and the 3.70 gear ratio offers a good balance between acceleration and top speed. The Speedway part is manufactured to meet or exceed OEM specifications, ensuring long-lasting durability.

3. Cost-effective: Compared to purchasing a new complete differential assembly or rebuilding an existing one, replacing just the third member and the gear set can save you time and money.

1. Installation Complexity: Installing a new differential third member and gear set can be a complex process, requiring specialized tools and a strong understanding of differential systems. If you are not confident in your abilities, it is recommended to have a professional mechanic perform the installation.

2. Potential for Incorrect Installation: Improper installation can lead to various issues, such as excessive noise, vibration, or even catastrophic failure. Following the manufacturer's instructions carefully and ensuring that all necessary torque specifications are met is essential.

3. Limited Warranty: The Speedway 91049345-31-370 Posi differential 3rd member 3.1 spline, 3.70 gear for Ford comes with a limited warranty, which may not cover all potential issues. Make sure to read the warranty terms and conditions before making a purchase.

The Speedway 91049345-31-370 Posi differential 3rd member 3.1 spline, 3.70 gear for Ford offers several benefits, including improved traction, durability, and cost-effectiveness. However, there are also potential drawbacks, such as the complexity of installation and the limited warranty. If you are confident in your abilities or have access to a professional mechanic, this part can be an excellent investment for enhancing your Ford's performance while saving time and money compared to a complete differential overhaul.

If you decide to purchase the Speedway 91049345-31-370 Posi differential 3rd member 3.1 spline, 3.70 gear for Ford, ensure that you follow the manufacturer's instructions carefully during installation. Double-check that all necessary torque specifications are met to avoid any potential issues. If you are not confident in your abilities, consider having a professional mechanic perform the installation for you to ensure optimal performance and longevity.

Details:

specifications differentialsdepo:

• for makes: Ford
• brand: Speedway Motors
• type: Differential Third Members
• item length: 18.00
• item width: 14.300
• california prop 65 warning: True
• ean: 9104934531370

seller differentialsdepo:

• city: clearfield, utah
• rating: 98.6%
• # reviews: 50313

payments differentialsdepo:

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

shipping differentialsdepo:

• type: fixed
• class: standard
• service: usps ground advantage
• carrier: usps
• transit: 3-9 days

general differentialsdepo:

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

offer differentialsdepo:

• options: ship-to-home
• started: july 23, 2025
• availability: in stock
• in stock #: 1
• sold #: 24
• price: $1027.99
• item condition: New

returns differentialsdepo:

• policy: no returns