Key Features
- Custom-built 3.5-inch diameter aluminum tube construction for optimal strength-to-weight ratio
- 51.25-inch overall length sized for Mercury Cougar applications
- Forged steel 31-spline slip yoke for secure transmission engagement
- 1310 series U-joints (3.219-inch width, 1.062-inch cap diameter) installed and balanced
- Reduces rotating mass 10-20 lbs compared to factory steel driveshafts
- Professionally balanced for smooth, vibration-free operation at all speeds
- Corrosion-resistant aluminum construction outlasts steel in harsh environments
- Made in the USA
Description
Factory steel driveshafts add unnecessary rotating mass that your engine has to work against with every revolution. This custom aluminum driveshaft for Mercury Cougar applications delivers a significant weight reduction that translates directly to improved throttle response and quicker acceleration. Because rotating weight is magnified compared to static weight, every pound saved on the driveshaft has an outsized impact on drivetrain efficiency.
The 3.5-inch diameter aluminum tube provides the ideal balance of rigidity and weight savings. Unlike thinner-wall steel shafts that can flex and lose power under hard acceleration, the aluminum construction remains stable at high RPM while reducing parasitic drag on the engine. The forged steel 31-spline slip yoke ensures precise, slop-free engagement with your transmission output shaft, while the 1310 series U-joints deliver proven reliability for both street and performance applications.
Every MDL driveshaft is custom-built to your vehicle's exact specifications. The 51.25-inch overall length is sized for Mercury Cougar installations, but we can adjust length as needed based on your build sheet measurements. Aluminum's natural corrosion resistance also means this driveshaft will outlast factory steel units, especially in areas with road salt or high humidity. Professional balancing ensures smooth operation throughout the RPM range.
This driveshaft requires measurements from your completed vehicle before we can build it. Submit your completed Driveshaft Build Sheet to info@moderndriveline.com to get started. Made in the USA with lifetime technical support.
Kit Includes
- Custom aluminum driveshaft assembly - 51.25-inch overall length
- 3.5-inch diameter aluminum tube
- Forged steel 31-spline slip yoke
- 1310 series U-joints - installed and balanced
- Professional balancing and quality inspection
- Lifetime technical support