Chrome Transmission Filler Plug & Dipstick – Fits Harley FLST / FXD / FLT / FXST / FXR (1987–2006) – Replaces OEM 37075‑87 – Made in USA

OVERVIEW

This chrome transmission filler plug and dipstick acts as a direct replacement for worn factory components while upgrading the mechanical interface of Harley-Davidson Big Twin platforms. Constructed with a durable chrome-plated finish, it delivers precise fluid-level monitoring alongside improved corrosion resistance. Engineered specifically for Touring and Softail families, this hardware piece merges straightforward functional upgrades with clean aftermarket styling.

ENGINEERING & PERFORMANCE

The unit functions as a drop-in replacement that restores accurate fluid checks without requiring system bleeding or adapter fabrication. Clearly marked dipstick graduations prevent misreads, ensuring the transmission stays properly lubricated under heavy loads. The chrome surface shields against road grime and moisture exposure, while domestic machining standards maintain strict tolerance levels for leak-free operation. Installation mirrors the original mounting geometry for immediate readiness.

KEY FEATURES

• Chrome-plated transmission filler plug and integrated dipstick
• Direct replacement for OEM part number 37075‑87
• Precise dipstick markings for reliable fluid level verification
• Clean chrome finish protects the transmission housing appearance
• Manufactured domestically in the United States
• Straightforward bolt-on design with no model modifications required

TECHNICAL SPECIFICATIONS

• Part name: Chrome Transmission Filler Plug & Dipstick
• Part type: Hardware / Transmission Component
• Material: Chrome-plated metal alloy
• Supported years: 1987–2006
• Compatible Harley trims: Touring, Softail, Dyna, FXR
• OEM cross-reference: 37075‑87
• Origin: Made in USA

FITMENT

• Harley Touring (1987–2006)
• Harley Softail (1987–2006)
• Harley Dyna (1991–2005)
• Harley FXR (1987–1994)

WHY HARLEY RIDERS CHOOSE THIS

Maintenance-focused riders select this component because it replaces deteriorating factory dipsticks and corroded filler caps with a single, precision-machined unit. The transparent graduation markings remove guesswork during oil changes, safeguarding transmission internals from premature wear while keeping the work area tidy. American-built construction ensures consistent threading and sealing performance across varying climate conditions. For late-eighties through mid-2000s touring and softtail chassis, this hardware swap delivers predictable reliability alongside a refined, factory-retained aesthetic.