Harley-Davidson Milwaukee-Eight Gloss Black Transmission Top Cover 34800031

This engine cover is the perfect start in converting your powertrain to an elegant “tuxedo black” look.

• Gloss black

• Manufactured from Original Equipment components to ensure a perfect fit

• Coated with temperature-resistant paint to ensure a long-lasting finish

• Critical surfaces are masked to provide good gasket seal

• Complete the look with matching primary covers, rocker housings, rocker covers, cam covers and transmission covers (sold separately)

Fits ’18-later Softail® and ’17-later Touring and Trike models. Harley-Davidson Milwaukee-Eight Gloss Black Transmission Top Cover 34800031

Harley-Davidson Milwaukee-Eight Gloss Black Transmission Top Cover 34800031

The Harley‑Davidson Milwaukee‑Eight Gloss Black Transmission Top Cover (Part # 34800031) is a genuine engine trim accessory designed to enhance both the appearance and durability of select Milwaukee‑Eight motorcycle transmissions. This top cover replaces the standard factory unit with a sleek gloss black finished piece that contributes to a coordinated “tuxedo black” aesthetic — a popular styling theme among riders seeking a more aggressive and refined look for their powertrain. (Harley-Davidson) Harley-Davidson Milwaukee-Eight Gloss Black Transmission Top Cover 34800031

Premium OEM Quality & Fitment
Manufactured from Original Equipment components, this transmission top cover ensures a precise fit as intended by Harley‑Davidson’s engineering standards. Because it uses OEM‑level materials and tolerances, it seamlessly integrates with the transmission housing without requiring modifications, maintaining proper alignment and sealing with the rest of the drivetrain. (Harley-Davidson) Harley-Davidson Milwaukee-Eight Gloss Black Transmission Top Cover 34800031

Gloss Black Finish
The standout feature of this accessory is its deep gloss black finish, which elevates the motorcycle’s visual appeal by adding a contrast to other engine components or continuing a darkened trim theme across exposed parts. The finish is not merely cosmetic — it is coated with temperature‑resistant paint that helps the cover withstand heat cycles, road debris, and environmental exposure encountered during regular riding. This coating enhances longevity and keeps the gloss sheen looking sharp over time. (Harley-Davidson) Harley-Davidson Milwaukee-Eight Gloss Black Transmission Top Cover 34800031

Critical Surface Masking for Seal Integrity
During manufacturing, critical sealing surfaces are carefully masked to protect them from overspray and to ensure that proper gasket contact and sealing are maintained when the cover is installed. This attention to detail helps prevent leaks that could otherwise occur if paint or coating interfered with the mating surfaces, preserving transmission fluid integrity and reducing the risk of post‑installation issues. (Harley-Davidson) Harley-Davidson Milwaukee-Eight Gloss Black Transmission Top Cover 34800031

Style Coordination with Other Trim Pieces
Part #34800031 is ideally used as the foundation of a cohesive “tuxedo black” engine appearance package. It pairs well with other gloss black Harley‑Davidson engine trim components — including primary covers, rocker housings, rocker covers, cam covers, and other transmission covers — most of which are sold separately. Riders aiming for a unified, high‑contrast look across their softail, touring, or trike build often start with this cover for the transmission and then add additional matching pieces. (Harley-Davidson) Harley-Davidson Milwaukee-Eight Gloss Black Transmission Top Cover 34800031

Fitment & Compatibility
This transmission top cover fits a broad range of Milwaukee‑Eight‑equipped motorcycles:

• ’18‑later Softail® models
• ’17‑later Touring models (with some exceptions, such as the ’25‑later FLTRXRRSE)
• Trike models powered by the Milwaukee‑Eight engine configuration
  It’s important to note that the cover does not fit center‑cooled models, so riders should confirm fitment for their specific bike before purchase. (Harley-Davidson) Harley-Davidson Milwaukee-Eight Gloss Black Transmission Top Cover 34800031

Installation & Considerations
Installation is straightforward for experienced mechanics or dealers; however, because transmission covers interface with gaskets and sealed components, riders may need to purchase a new gasket when installing this cover to ensure a leak‑free fit. Consulting a Harley‑Davidson dealer or service manual is recommended to verify correct gasket part numbers and torque specifications. (Harley-Davidson) Harley-Davidson Milwaukee-Eight Gloss Black Transmission Top Cover 34800031

In summary, the Milwaukee‑Eight Gloss Black Transmission Top Cover (34800031) is a practical yet stylish accessory that upgrades the visual presence of the transmission area while maintaining OEM fit and protective functionality — making it a smart choice for riders customizing their Milwaukee‑Eight motorcycle’s appearance. (Harley-Davidson) Harley-Davidson Milwaukee-Eight Gloss Black Transmission Top Cover 34800031