Harley Three-Hole Service: Oil, Transmission & Primary | 2017 Softail Slim S | Ep. 03

Time to give the Slim S some fresh fluids! In Episode 03 of the Devil's Own Slim S Build, I walk through a complete three-hole service on my 2017 Harley-Davidson Softail Slim S, changing the engine oil, transmission fluid, and primary fluid. Follow along as I work through each fluid change on the Screamin’ Eagle 110, showing the process from draining to refilling. This series follows my Slim S build with maintenance and step-by-step installations. I’m filming the work so we can do this build together. Drop a comment with your favorite fluids or tips for a three-hole service, and subscribe to Devils Own for the next episode! Always consult the service manual for your motorcycle’s fluid specifications, capacities, and torque values.