Most bikes require 1.4 quarts of primary fluid, and thus you may have to purchase an additional quart of primary fluid. It is also easy to find neutral, which makes it easy to find oil leaks.ĭespite its many pros, we feel that 1 quart of transmission oil isn’t enough for most people. In addition to the oils, you also get a versatile funnel as well as a hat. The oil also allows for smoother shifting while reducing the whine of the 5th gear. This makes it ideal for long-distance riding and for a heavy load. More importantly, the oil manages to maintain its viscosity despite its low temperatures. In terms of performance, we noticed a significant reduction in the notorious shifting clunk with this oil. So what exactly is included in this package? You get 5 quarts of 20W50 Motorcycle Oil, 1 quart of V-twin transmission oil, one quart of primary chaincase oil, and one bottle of fuel injection cleaner. This oil kit from Red Line is a cost-effective option, especially if you live in areas with a warmer climate. While this oil is a bit pricier compared to other options, it is worth every penny you spend on it. The title of the best transmission oil for Harley Davidson has to go to the Specto oil HDPG6 heavy-duty synthetic trans lube.
Spectro Oil R.HDPG6 Heavy Duty Platinum Full Synthetic 6spd Trans Lube 1 Quart Do not put more than the required amount. It is essential to know how much transmission fluid your bike requires. Use the long funnel to pour the transmission fluid. Use the ⅜ inch ball end Allen wrench to remove the transmission cover and dipstick. After reinstalling the plug, it is time now to add the fluid. Once the new O-ring is in place, use your ⅝ inch socket and an extension to reinstall the drain plug. Take the new O-ring and slide it into the transmission plug. Once removed, check the drain plug for any damage and remove any debris. These are a torque wrench, a drain pan, a new O-ring for the drain plug, a ⅝ inch socket with a socket wrench, a ⅜ inch ball-end Allen wrench, a funnel, and the fluid.įirst, you will need to remove the transmission drain plug located between the shock absorbers and the transmission. There are several tools you will need for this project. How To Change Transmission Oil In A HarleyĬhanging the transmission fluid in a Harley Davidson is relatively easy. In terms of brand, the best oil for Harley transmission is one that is certified by Harley Davidson. There are various types of transmission oils, with the best to use being synthetic oil. What Kind Of Transmission Oil Can I Use On My Harley On the other hand, if you use your Harley Davidson occasionally, the fluid change will be less frequent. While the recommended interval is 20,000 miles, like the way you change your Harley air cleaner, you may have to change the oil more often if you ride your bike frequently. The answer to this question depends on how often you ride your bike. How Often Should I Change The Transmission Fluid On My Harley Davidson? Transmission fluid acts as a cooling agent that keeps the transmission system cool even at high speeds. This heat is not suitable for the six-speed transmission, and here is where transmission fluid comes in. And since the bikes are air-cooled, they heat up quickly, especially when traveling at high speeds for an extended period. The Harley Davidson 6 speed transmission allows for improved acceleration. Also, we considered the impact of each fluid on the gear noise. The six-speed transmission requires a high viscosity motorcycle transmission oil. In our selection, we considered several key things, among them viscosity. How We Picked The Best Transmission Fluids? We then compiled our findings and narrowed them down to 6 transmission fluids ideal for the six-speed transmission. Therefore, we tested the different fluids to see how they performed on different Harley Davidson models. We crafted this review for the Harley 6 speed transmission. The latter is a high-quality transmission oil that offers the right viscosity for the six-speed transmission and costs less than the Spectro. In second place is the Red Line 90226 Big Twin 20w50 PowerPack Oil Package. However, it offers exceptional performance for its cost. This is one of the pricier options out there. Our top pick is the Spectro Oil R.HDPG6 Heavy Duty Platinum Full Synthetic 6spd Trans Lube 1 Quart. In addition to reviewing the eight best transmission fluids for the Harley Davidson, we have also included a buying guide on selecting the best.