Andrews Manual Transmission Gear

Andrews Manual Transmission Gears: Precision-Built for Harley-Davidson Powertrains

When it comes to manual transmission gear components for Harley-Davidson motorcycles, few names carry the weight that Andrews Products does. Manual transmission gears are the mechanical heart of any powersports drivetrain, and Andrews has spent decades engineering parts that meet the demands of both street riders and serious competitors.

Founded in 1972, Andrews Products quickly made its reputation in the Harley-Davidson performance community. As one source notes, the brand started “making performance-enhancing camshafts and transmission gears whose quality was quickly recognized.” That legacy continues today: Andrews is widely acknowledged as one of the largest suppliers for OEM replacement and motorsport transmission components, combining deep application knowledge with modern manufacturing.

What Sets Andrews Transmission Gears Apart

The construction of Andrews transmission gears reflects a commitment to durability that goes beyond stock specifications. Each gear is manufactured from high-nickel alloy steel, then heat-treated and shot-peened for maximum wear resistance. Shot peening, in particular, significantly improves the durability of drive edges and load-bearing surfaces—two areas that take the most punishment in any hard-shifting motorcycle transmission.

Andrews also puts its products through computer-controlled inspection, ensuring consistent tolerances across every part that leaves the facility. All Andrews Products parts are proudly made in the USA, a point of distinction in an increasingly global aftermarket.

4-Speed and 5-Speed Options for a Wide Range of Models

Andrews offers a comprehensive lineup covering both 4-speed and 5-speed Harley-Davidson transmissions, spanning decades of model history—from classic Big Twin Flatheads and Panheads all the way through Evolution and Twin Cam platforms. Specific product lines include:

• 5-Speed Gear Sets (EV80 / Evolution Big Twin) – Individual gears, complete mainshaft and countershaft sets, and full gear set kits for 5-speed transmissions
• Close-Ratio 5-Speed Gear Sets – Designed for FXR and Touring models, these tighten the gaps between gear ratios for more responsive power delivery on the road or track
• 4-Speed Big Twin Gear Sets – Available in stock-replacement and close-ratio configurations (2.60:1 and 2.44:1 ratios), covering Big Twin models from 1937 onward
• 4-Speed and 5-Speed Sportster Gears – Individual gears and complete sets for XL Sportster transmissions spanning 1957 through the mid-1990s
• Complete Gear Set Kits with Forks and Clutches – All-in-one rebuild solutions that simplify installation and ensure component compatibility

Street Reliability and Racing Performance

Andrews develops its transmission gear ratios with real-world performance in mind. Their close-ratio first gear sets, for example, provide a higher first gear and help eliminate the notorious 2nd-gear “clunk” common to Harley-Davidson big-twin transmissions. The result is smoother, more confident shifting—whether you’re navigating city traffic or pushing through the gears on an open road. Andrews’ use of alloy steel stronger than stock specifications means these gears are built to outlast OEM components under comparable or harder use.

For riders restoring a vintage Knucklehead or upgrading a modern Twin Cam, Andrews manual transmission gears represent one of the most trusted choices in the Harley-Davidson aftermarket. Browse the full selection and find the right gear set for your application.