91049345-31-411 SPEEDWAY MOTORS Posi Differential Member Spl

Review SPEEDWAY MOTORS Posi Differential 3rd Member 31 Spl 4.11 Gear Ratio Fits Ford Inch for FORD

Introducing the Speedway Motors 91049345-31-411 Posi Differential 3rd Member for Ford vehicles, specifically designed for those seeking a high-performance upgrade for their rear end assembly. This 3rd member housing is engineered to house a Posi differential unit with 31-spline output shafts and 4.11 gear ratio, delivering superior traction and power transfer.

Crafted from premium steel, this 3rd member ensures maximum strength and durability to withstand the demands of high-horsepower applications. The 31-spline design of the output shafts provides a larger contact area between the pinion and the shaft, enhancing the overall torque capacity and reliability of the differential.

The 4.11 gear ratio is an excellent choice for those seeking a balanced combination of acceleration and top-end speed. This gear ratio provides ample power for passing maneuvers and merging on the highway, while still maintaining reasonable cruising RPMs for fuel efficiency and longevity.

- Ford Mustang (1965-1970)

- Ford Falcon (1964-1970)

- Ford Fairlane (1962-1970)

- Ford Galaxie (1962-1970)

- Ford Thunderbird (1964-1970)

Installation of this 3rd member is a straightforward process, making it an ideal upgrade for both DIY enthusiasts and professional mechanics. The housing comes complete with all necessary mounting bolts and hardware, ensuring a hassle-free installation experience.

Upgrading to a Speedway Motors 91049345-31-411 Posi Differential 3rd Member offers numerous benefits, including improved traction, enhanced power transfer, and increased durability. Whether you're looking to take your Ford to the track or simply wish to elevate its performance on the street, this 3rd member is an excellent investment for any Ford enthusiast.

The Speedway 91049345-31-411 Posi Differential 3rd Member 31 Spl with 4.11 gears is a crucial component of the Ford differential system. This part is essential for those looking to upgrade their Ford vehicle's performance or restore an older model. Here are some pros and cons to help you make an informed decision about purchasing this product.

1. Improved Traction: The Posi differential provides better traction by preventing the wheels from spinning independently during cornering or acceleration. This results in better control and improved overall vehicle performance.

2. Durability: This third member is made of high-quality materials, ensuring it is strong and long-lasting. The gears are heat-treated and precision-machined for optimal performance and durability.

3. Customizability: This third member is compatible with various Ford models and can be used in both rear-wheel and four-wheel drive applications. It also comes with different gear ratios, allowing users to choose the best one for their specific driving needs.

4. Affordable: Compared to OEM (Original Equipment Manufacturer) alternatives, aftermarket parts like this one are often more affordable, making them a cost-effective option for Ford enthusiasts.

1. Installation Complexity: Installing this third member can be a complex process, especially for those without prior experience. It requires specialized tools and knowledge, so it may be best to consult a professional mechanic for installation.

2. Potential Noise: Some users have reported increased noise levels after installing a Posi differential. This noise can be due to the gears meshing more aggressively, but it may be reduced with proper lubrication and break-in.

3. Potential Vibration: In some cases, installing a Posi differential may result in increased vibrations, especially at higher speeds. This can be due to improper installation or balancing issues. A professional mechanic can help diagnose and address any vibration concerns.

In conclusion, the Speedway 91049345-31-411 Posi Differential 3rd Member 31 Spl with 4.11 gears offers several advantages, including improved traction, durability, customizability, and affordability. However, it comes with potential cons such as installation complexity, potential noise, and vibration.

Considering these factors, it is recommended that those who are not confident in their mechanical abilities consult a professional mechanic for installation. Additionally, those who are sensitive to noise or vibration may want to consider alternative options or take extra precautions during installation to minimize these issues. Overall, for those looking to enhance their Ford's performance, this product can be an excellent investment.

Details:

New open box see photos minor.

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: 9104934531411

general differentialsdepo:

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

returns differentialsdepo:

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

payments differentialsdepo:

• other
• wallet: paypal
• credit card: discover

offer differentialsdepo:

• price: $1027.99
• item condition: New
• availability: in stock
• in stock #: 1
• sold #: 25
• started: june 19, 2025
• options: ship-to-home

seller differentialsdepo:

• rating: 99.0%
• city: morgan, utah
• # reviews: 2954

shipping differentialsdepo:

• service: usps ground advantage
• carrier: usps
• type: fixed
• class: standard
• transit: 5-11 days