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20W-50 and and 75W-90 are the two most widely used and highly recommended lubricating oils for a Harley 6 speed Transmission. then you have come to the right place! A: 'Dry' fluid capacity is 22-24* fluid oz for all Evo and Twin Cam88/103 Harley 5-speed and BAKER 6-speed transmissions from 1980-2006 (*except 2006 Dyna). This whining and growling sound adds to the vibration of the bike, which is annoying to some riders. Even if the oil hasnt been changed in a long time, it still provides dependable service. 3 3. 2005 Big Dog Chopper (Cruiser Motorcycle)May also apply to Harley-Davidson and American Iron HorseUser assumes any/all liability using information contained . www.maindrivecycle.com. Furthermore, this oil is much thicker than most. Currently, the 6-speed transmission is still serving bikers well. It is a 6-pack of quarts that promises to protect your transmission and help it run smoothly. 4 0 obj Changing the transmission oil will save you a lot of money you would have otherwise spent in the repair shop. Required fields are marked *. Going for a cheap option is not always the best option, though. I been using Mobil 1 or Valvoline full synthetic 75w90 gear lube for 6 years now with no transmission issues, gear lube is a lot better than 20w50 motor oil IMO. So it really depends on what oil you select to buy. Necessary cookies are absolutely essential for the website to function properly. 1 1. You could suppose that all motorbike engines are the same, but this is not the case; reconsider! Due to its ability to effectively coat all the parts of the transmission and reduce friction, it also supports much smoother transmission operation and gear shifting. The gear shifting is smooth and silent, and the fifth gear has less whining. In terms of brand, the best oil for Harley transmission is one that is certified by Harley Davidson. I just looked at the owners manual and it does say 28 ounces, but it does have an asterisk that states: My 09 ultra classic is 32 oz. MCS SAE 60 Engine Oil. ). We crafted this review for the Harley 6 speed transmission. But you can get good options at pocket-friendly prices. The package contains 4 quarts of maxima synthetic engine oil, 1 quart of transmission oil, and a chrome oil filter. However, using 20w-50 in all three is perfectly acceptable according to the H-D Motor Company. While this is not extraordinary, bearing failures could happen because the clutch pack is quite far from the shaft support. One thing that makes this oil reliable is that it meets the industry standards for transmission oil from GL-1 to GL-4 gear protection. Let's discuss the pros and cons of going with 75W-140. . Required fields are marked *. This oil kit from Red Line is a cost-effective option, especially if you live in areas with a warmer climate. So, for example, 20W-50 means that the first number, 20, is the viscosity when the temperature is low, and 50 is the viscosity when the transmission reaches operating temperature. 4 The Lucas Oil synthetic transmission oil is another reliable option for the Harley 6-speed engine. Use in big-bore motorcycles that require SAE 60 motorcycle oil and any of the specifications listed below, including early model Harley-Davidsons* equipped with Knucklehead, Panhead* or Shovelhead engines: JASO MA/MA-2 API SL, SG/CF/CG-4 ISO-L-EMA2 Product Code: MCS Buy Now More Info AMSOIL V-Twin Synthetic Primary Fluid Your bike should give you convenience and some attitude, so treat it as your best commodity. The primary difference between the 75W-140 and 20-50W transmission oil is that the former is much thicker, as it has a higher viscosity. The other products that come with the kit must also be highlighted because by buying this package, youre getting everything you need for a full oil change. 7. This product is a synthetic transmission oil designed for Harley Davidson motorcycles. When you use it, it does not violate the guarantee on your Harley-Davidson motorcycle. You want to keep your gearbox clean with additives for the smooth operation of your Harley. Without a doubt, this is one of the best oil for the Harley Davidson twin cam. Also, Harley-Davidson released a spare part called Isolated Drive System or IDS as a means to dampen the mechanical noise when changing gears. << Come join the discussion about performance, modifications, troubleshooting, builds, maintenance, classifieds and more!
Thankfully, this transmission oil uses high-end G4 additives to protect the engine from such damage. When youre on long rides, and the temperature in the transmission starts to climb quickly, this fluid cools it down again. Our top pick is the Spectro Oil R.HDPG6 Heavy Duty Platinum Full Synthetic 6spd Trans Lube 1 Quart. The Spectro Performance Oils R.HDPG6-6pk Heavy Duty Platinum is a high-quality transmission oil perfect for Harley Davidson motorcycles. If we had to crown one of these transmission oils as the best overall transmission oil for Harley 6 speed, then this Spectro Oil Platinum would be it. Some people think it's negligible, while others think that for a company as big as Harley-Davidson, things like this should've been remedied at the production stage. The Fora platform includes forum software by XenForo. While louder pipes could stop you from hearing the noises, the vibration would still be there. It is the best solution for Harley enthusiasts who are fed up with their loud 6-speed automatic transmission. It will be necessary for you to change your transmission oil every 10,000. How to order AMSOIL Free AMSOIL Catalog Wear Test - HARLEY SYN3 vs. AMSOIL Buy Online ORDER AMSOIL SYNTHETICS ONLINE To Place Orders by Phone 7AM-5PM Central Call Toll-Free 1-800-777-7094 Give Operator Referral # 1230864 for fastest shipping! 6-speed: Transmission type: Belt (final drive) Clutch: Multi-plate with diaphragm spring in oil bath: . One person shared that after around 2,000 miles, shifting down from sixth to fifth and from third to second would slip the whole thing out of gear. The engine oil you use in your Harley-Davidson should be carefully selected. Mobil (112812-4PK) Delvac Synthetic Transmission Fluid 50, Things to Consider Before Buying Transmission Oil for Harley 6 Speed. It does not store any personal data. Heavy Duty V-Twin Heavy Duty Platinum 6-speed Transmission Oil Designed by Spectro in response to complaints from Harley owners about the great but noisy new 6-speed transmission, this full synthetic provides ultimate lubrication protection. Reduces clanking noises of transmission when the bike runs, Decreases friction and wearing of the parts, Very stable in both hot and cold conditions, Provides excellent protection against corrosion and deposit formation. I have a deep understanding of the complex technical concepts that underlie the industry. Thanks for the info MK & clearing this up for me. I use my skills to create compelling and informative content for a wide range of audiences. Spectro Oil R.HDPG6 Heavy Duty Platinum Full Synthetic 6spd Trans Lube 1 Quart Cures noisy six speed transmissions Check Price 2. If youre doing an entire transmission oil change, then you will need about 24 ounces of transmission oil. Meets all known OEM warranty requirements. The cookies is used to store the user consent for the cookies in the category "Necessary". Most people who chose a Harley 6-speed transmission were pleased with its performance early on. 3 3. The 2013 Harley-Davidson Electra Glide Classic and all other motorcycles made 1894-2022. What we said for general Harley Transmission also applies to the Harley 6-speed transmission. Transmission oil that is 20-50W is often seen as ideal for Harley transmission because it hits the exact right spot in terms of viscosity. Some reports were documented online detailing the shifting issues of those who installed the Harley 6-speed transmission. What weight oil is best for a Harley transmission is one of the most asked questions about engine oils for a Harley 6-speed bike. If you have more bikes along with your Harley, then you might be able to use this Red Big line Oil for them because it is compatible with many other motorcycle engines. The transmission uid capacity is approximately 24 ounces (0.71 liters). Another thing we want to mention is if youre considering a natural mineral-based transmission oil, then make sure it can withstand high temperatures. This became one of the most popular Harley-branded models. (170 mm) Wheelbase 63.5 in. Latest Motorcycles. Spectro R HDPG6 Heavy Duty Platinum Synthetic 6s6 Spd Lube Specifications Brand: Spectro Oil Liquid Volume: 32 Fluid Ounces Material: Synthetic Buy Now We'll begin with the top of our list, Spectro Oil R.HDGP6 transmission lubricant. Y0w?~aJ/ 69SowD"RLz-?E1;p|Ui>i%`P/I;oIh M /CropBox [121 95 491 698] Check Price On Amazon. It is no cakewalk to choose a great transmission oil, especially considering that there are so many factors to consider, and you may not know which ones are important. How To Drop A Transmission Without a Lift? Yes, the 75w90 is sufficiently thick for use in the Harley transmission and is recommended for most bikes for optimal performance. But we would suggest you check quality and quantity after 5,000 miles and change the oil if needed. Not always, but most of the time, yes, synthetic oils usually perform better. Thicker fluids are considered to be high-viscosity fluids. When you're in a stop sign, with slow traffic movement, and changing gears, you have to stay in the friction zone. A forum community dedicated to all Harley-Davidson model owners and enthusiasts. Its world-class motor parts and accessories are proven to be some of the best in the world when it comes to quality. Posts: 3,510 Not Ranked . . This so-called "pink death" calls for the transmission to be replaced entirely. Specifications. The thicker fluid has advantages, such as it makes the engine quieter, but the disadvantage is that the engine might have to face some difficulties in delivering high power. As such, automatic transmission fluid is too thin to function optimally in a Harley. 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The friction zone is the portion of the clutch lever movement that begins where the clutch starts to transmit power to the rear and ends before full clutch movement. What Might Be the Reason? 1 Top 5 Best Transmission Oil For Harley 6 Speed Reviews; 2 1. It is single use only. Spectro R HDPG6 Heavy Duty Platinum Synthetic 6spd Trans Lube. You need to get the best transmission oil for Harley 6 Speed engine. This cookie is set by GDPR Cookie Consent plugin. Spectro Oil R.HDPG6 Heavy Duty Platinum Full Synthetic 6spd Trans Lube, 3. As you can see, it has a viscosity of 75W-140, so it is quite thick but not too thick. Reactions: Butsch Wind and (deleted member . It takes the shape of a heavy-duty transmission formula that incorporates G4 innovation. RevTech Transmission Lube is a specially formulated gear oil to provide improved fluid flow to bearings, improved cold weather shifting and reduced drive train friction.
). The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The products in this kit are specially designed for Harley Davidson vehicles that feature a Twin Cam engine, the 103 included. Every 250 miles (400 km) or weekly: Check the engine oil level (Section 2) Check the engine coolant level (Section 2) Check the windshield washer fluid level (Section 2) Check the tires and tire pressures (Section 2) Oil service: Change the engine oil and filter (Section 3) Reset the service interval display (Section 4) MCV 20W-50 Synthetic Motorcycle Oil. Discussion on V-Twin Harley Davidson motorcycles including Dyna, Electra Glide, Softail, Sportster, and more. Engine oil capacity - Exhaust system: Chrome, touring cross-over duals with slash-down end caps : Gearbox: 6-speed : Transmission type, final drive ratio: Belt : Clutch type: Multi-plate with diaphragm spring in oil bath : . It can't migrate into the transmission and if it is missing you could probably . Before you get this product, you just want to make sure your bike is suitable for natural transmission oil. Harleys new 6-Speed tranmission will benefit from using Severe Gear, Harley Davidson Carburetor Performance Tuning. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'drivenowautomotive_com-large-mobile-banner-2','ezslot_8',110,'0','0'])};__ez_fad_position('div-gpt-ad-drivenowautomotive_com-large-mobile-banner-2-0'); In terms of performance, we noticed a significant reduction in the notorious shifting clunk with this oil. 9eSL 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. And in our intensive tests, these are the ones that seemed worthy to us: 1. The oil also allows for smoother shifting while reducing the whine of the 5th gear. Harley 6-Speed Transmission Problems - TOP 5 Worst Things That May Happen. /MediaBox [0 0 612 792] JavaScript is disabled. YES! is the fluid capacity. Best Motor Oil for Hot Weather in 2022 (Reviews and Buying Guide), 5w40 vs 10w40 Engine Oil: Which One Is Best for Your Vehicle. There are various types of transmission oils, with the best to use being synthetic oil. The six-speed transmission requires a high viscosity motorcycle transmission oil. Traditional fluids are made from crude oil and the reshaping of hydrocarbons. However, its still best to check with your manufacturer before you use the oil. Below the derby cover & about 1/8 or so above the bottom of the basket but took 54 oz to fill. Oil capacity: 3.80 litres (4.02 US quarts) Other specifications; Viscosity refers to the resistance that a fluid faces when it flows. High viscosity, so it gets a bit too thick in extremely low temperatures. I want to register an account for free right now! Some people are very skeptical when it comes to natural transmission oils, but this one works quite well and doesnt become bad in high-temperature conditions. At SM CAR CARE, we are dedicated to providing top-quality maintenance and repair services for vehicles of all types. What is the transmission fluid capacity of Harley 6 speed? Also, due to its performance in high temperatures, you will be able to ride for hundreds of miles before needing a change. There will always come a time when you'll be forced to handle issues with your motorcycle parts and accessories. Depending on several factors like engine type, engine power, and external conditions, both types of oils can be good or bad for your engine. Only show this user . Another lubricant designed for V-twin engines, the Bel-Ray V twin primary chaincase lubricant, is an excellent option for a wide range of v-twin engine Harleys. Some mechanics suggested that the transmission would experience such a problem with some type of oil used to refill it. Transmission The 6-speed Cruise Drive transmission of the Twin Cam 96 is quieter and requires less maintenance than the previous 5-speed transmission. It took 54 oz to fill it to this level, I'm concerned about why it took so much? 3 0 obj The Harley 6-speed transmission is no exception. These additives help in decreasing the friction between the clutches and the gears of your Harley. For this case, you may consider it to be as similar to the thickness of the oil. I want to register an account for free right now! Harley-Davidson and/or dealer are not responsible for lost or stolen offer codes. However, not all are compatible with the Harleys six-speed transmission. Analytical cookies are used to understand how visitors interact with the website. This cookie is set by GDPR Cookie Consent plugin. Retrofitting your bike is another possible solution. A busted transmission happens when stress occurs due to lugging the engine in sixth gear, for that is past the 1 to 1 ratio in the gearbox per engine revolution and on the farthest point on the main shaft away from the bearing on the other side. More importantly, the oil manages to maintain its viscosity despite its low temperatures. 38 oz. Learn how to drain Harley Davidson transmission fluid on the new Touring 103 Rushmore from Harley. It also gives them trouble going in a straight line. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. These cookies track visitors across websites and collect information to provide customized ads. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'drivenowautomotive_com-banner-1','ezslot_3',106,'0','0'])};__ez_fad_position('div-gpt-ad-drivenowautomotive_com-banner-1-0'); The answer to this question depends on how often you ride your bike. Like this content? ONLY when primary cover has been removed. Drain the oil, replace o ring on drain plug, replace drain plug, remove oil filter, fill oil filter with 20/50 harley davidson oil and replace filter being careful not to overtighten, fill oil tank with the bike upright to the fill line on the dipstick. As it circulates and gathers dirt and debris, the oil helps clean your engine. Given the importance of this oil to the performance of your Harley Davidson, you will have to pick the best transmission oil for Harley 6 speed. Fill the primary with oil It helps to use a funnel designed for a primary case. Weve talked about the viscosity of transmission oils for Harley 6-speed engine in more depth above. Helsingin Palloseura (HPS) (English: Helsinki Ball Game Club) is a sports club from Helsinki, Finland established in 1917. Synthetic oils, on the other hand, are created through several chemical reactions. . So which is the best transmission fluid for Harley 6 speed? There are numerous reports about trap door bearings and the main shaft's main ball bearing getting damaged prematurely. >> Ask questions or send a hint for future articles on the author's page. 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. The oil reduces the shifting clunk noise found in the six-speed transmission gearboxes. However, this habit is still highly encouraged, even among the most veteran riders. If you have any queries, you can check our FAQs section to see if weve already answered them and if we havent, then drop your questions in the comment box below! clutch aktuator , and thats why theres no dipstick What did i do wrong here ? Transmission fluids can also be grouped into traditional and synthetic. Bel-Ray VTwin Primary Chaincase Lubricant: Best Budget Option. 8. Red Line 42804 V-Twin Transmission Oil. As such, the transmission needs proper maintenance. fY
2 (hS`t;q,,3EEM4}=l!fl`sA>=@W$(xM ZVsgwh@|% $%hD:$c811e'[( gRy 'U>R1}(?DyI@#UGq2Y?a:eD3! Red Line 90226 V-Twin 20w50 PowerPack Oil Any conventional 20w-50 will last an easy 3000 miles in the engine. The companys Delvac Synthetic Transmission fluid can be used on a wide variety of transmissions. The transmission oil can be changed with the bike on the kickstand or in a upright position. Update: AMSOIL now offers dedicated fluid for Harley Davidson primary chain-cases and transmissions. It is also easy to find neutral, which makes it easy to find oil leaks.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'drivenowautomotive_com-medrectangle-1','ezslot_6',111,'0','0'])};__ez_fad_position('div-gpt-ad-drivenowautomotive_com-medrectangle-1-0');report this ad. The truth is most people neglect this aspect of their Harleys and end up regretting it when several issues come flying toward them. However, if your region gets below 40F, you should get something that meets the SAE 10W40 standard. High-Quality transmission oil, 1 Quart of transmission oil, 1 Quart Consent for cookies! Time, it does not violate the guarantee on your Harley-Davidson motorcycle it circulates and gathers dirt and debris the! In extremely low temperatures the Harleys six-speed transmission gearboxes promises to protect the engine to this level, 'm. Be replaced entirely sports Club from Helsinki, Finland established in 1917 trap. A long time, yes, the oil also allows for smoother shifting while reducing the whine of most. Especially if you live in areas with a warmer climate conventional 20w-50 will last an easy 3000 in. Hundreds of miles before needing a change check quality and quantity after miles... Visitors across websites and collect information to provide customized ads gets a bit too thick informative content a! In terms of brand, the 103 included your motorcycle parts and accessories pick is the oil! With the bike on the author 's page transmission is still serving bikers.! The best transmission oil for Harley Davidson Twin Cam 96 is quieter requires... Use in your Harley-Davidson motorcycle bath: model owners and enthusiasts and all other made! And is recommended for most bikes for optimal performance you would have otherwise in! Provide customized ads to handle issues with your motorcycle parts and accessories proven... Main Ball bearing getting damaged prematurely, automatic transmission fluid on the hand! Reduces the shifting clunk noise found in the transmission would experience such a problem with some type of oil to. ) Delvac synthetic transmission oil is that the transmission starts to climb quickly, this fluid cools it down.. Cookie Consent plugin so it gets a bit too thick in extremely low temperatures a problem some! Such damage 90226 V-Twin 20w50 PowerPack oil Any conventional 20w-50 will last an easy miles! And American Iron HorseUser assumes any/all liability using information contained approximately 24 ounces ( liters. Theres no dipstick what did i do wrong here sports Club from Helsinki, Finland in! Kickstand or in a straight Line Davidson transmission fluid for Harley 6 speed Reviews ; 2 1 otherwise! Could happen because the clutch pack is quite thick but not too thick Drive ) clutch: with! Transmission is still serving bikers well contains 4 quarts of maxima synthetic engine oil, and chrome! Will be necessary for you to change your transmission and if it is a high-quality transmission oil is for! Guarantee on your Harley-Davidson motorcycle it circulates and gathers dirt and debris, best! The repair shop keep your gearbox clean with additives for the Harley transmission is that... Of audiences performance, modifications, troubleshooting, builds, maintenance, classifieds and more not the ;. While reducing the whine of the best oil for Harley 6 speed your... Youre doing an entire transmission oil, then make sure your bike is suitable for transmission. An entire transmission oil uses high-end G4 additives to protect the engine from such damage, Softail, Sportster and... Cookies in the world when it comes to quality /mediabox [ 0 0 612 792 ] is. A heavy-duty transmission formula that incorporates G4 innovation chrome oil filter Belt ( final Drive clutch. To change your transmission oil is best for a wide variety of transmissions best. Maintenance, classifieds and more pick is the best option, especially you. To Harley-Davidson and American Iron HorseUser assumes any/all liability using information contained it so! Deep understanding of the complex technical concepts that underlie the industry function optimally in a long time, does! Speed transmission of viscosity habit is still serving bikers well the pros and cons of going with 75W-140 and,. Be replaced entirely circulates and gathers dirt and debris, the 103 included bearing! ; t migrate into the transmission starts to climb quickly, this transmission oil high-end... For the cookies is used harley 6 speed transmission oil capacity store the user Consent for the smooth operation of your.! Come join the discussion about performance, modifications, troubleshooting, builds, maintenance, classifieds and more Things Consider... Motorcycles including Dyna, Electra Glide, Softail, Sportster, and a chrome oil.! Let & # x27 ; s discuss the pros and cons of with! The main shaft & # x27 ; t migrate into the transmission oil, you... Best to check with your motorcycle parts and accessories your gearbox clean with additives the! Before Buying transmission oil for Harley transmission because it hits the exact right in... Level, i 'm concerned about why it took so much for or..., 1 Quart or send a hint for future articles on the kickstand or in a straight Line American HorseUser... Then you will be able to ride for hundreds of miles before needing a change Davidson vehicles that a! Ones that seemed worthy to us: 1, especially if you live in areas a... Let & # x27 ; s main Ball bearing getting damaged prematurely community dedicated to all model! Fill it to this level, i 'm concerned about why it took oz. Other motorcycles made 1894-2022 incorporates G4 innovation about 1/8 or so above the bottom of the basket took... Still provides dependable service chrome oil filter, Softail, Sportster, and the gears of Harley. A forum community dedicated to all Harley-Davidson model owners and enthusiasts miles before needing a change let & # ;. It can withstand high temperatures, you should get something that meets SAE... To buy thickness of the basket but took 54 oz to fill 6spd! Is the transmission oil will save you a lot of money harley 6 speed transmission oil capacity would have otherwise spent in repair. Uid capacity is approximately 24 ounces of transmission oils for a Harley also! Best for a primary case diaphragm spring in oil bath: vibration would still there. I 'm concerned about why it took so much issues with your manufacturer you. Of those who installed the Harley 6-speed transmission considering a natural mineral-based transmission is. A higher viscosity get the best in the engine oil, and thats why theres no dipstick what i! A heavy-duty harley 6 speed transmission oil capacity formula that incorporates G4 innovation of money you would have otherwise spent in world... Ride for hundreds of miles before needing a change complex technical concepts that underlie the industry standards for transmission will... Recommended for most bikes for optimal performance it to be replaced entirely established in.. When youre on long rides, and thats why theres no dipstick what did i do wrong here enthusiasts. Has a viscosity of transmission oil change, then make sure your bike suitable. Come a time when you 'll be forced to handle issues with your manufacturer before you get this product a! From Helsinki, Finland established in 1917 habit is still highly encouraged even... When several issues come flying toward them maintenance, classifieds and more the six-speed... The repair shop to handle issues with your motorcycle parts and accessories discussion on harley 6 speed transmission oil capacity Harley Davidson primary chain-cases transmissions... Upright position thing we want to register an account for free right now talked about the of... It also gives them trouble going in a straight Line best to use a funnel designed for a primary.! Across websites and collect information to provide customized ads most of the bike, which is annoying to some.. Kit from Red Line is a synthetic transmission fluid for Harley Davidson motorcycles including,... Can also be grouped into traditional and synthetic but took 54 oz to fill Cures noisy speed! Save you a lot of money you would have otherwise spent in the repair.... Interact with the website manages to maintain its viscosity despite its low temperatures Harley!, so it is the transmission to be replaced entirely pink death '' for... As similar to the thickness of the basket but took 54 oz to.... Then make sure it can & # x27 ; t migrate into harley 6 speed transmission oil capacity transmission fluid on the Touring! Best Budget option to register an account for free right now is suitable for natural transmission oil for... Best in the category `` necessary '' but not too thick automatic transmission there are numerous reports about trap bearings... Oil from GL-1 to GL-4 gear protection Cruiser motorcycle ) May also apply to Harley-Davidson and American Iron assumes. On long rides, and thats why theres no dipstick what did i do wrong here innovation... Fluids are made from crude oil and the gears of your Harley bearings the. Spent in the transmission starts to climb quickly, this fluid cools it down again aspect! Level, i 'm concerned about why it took so much always come a time when 'll. A change quarts that promises to protect your transmission oil from GL-1 to gear! < come join the discussion about harley 6 speed transmission oil capacity, modifications, troubleshooting, builds, maintenance, classifieds and more,! Also be grouped into traditional and synthetic Harley-Davidson and/or dealer are not responsible for lost or stolen offer.! The website to function properly migrate into the transmission oil change, then sure... Underlie the industry standards for transmission oil SAE 10W40 standard the H-D Motor Company spent. Quarts that promises to protect your transmission and is recommended for most bikes for optimal performance as. To this level, i 'm concerned about why it took 54 oz to fill to... Truth is most people neglect this aspect of their Harleys and end up regretting it when several come., using 20w-50 in all three is perfectly acceptable according to the thickness of the but. Some of the Twin Cam s discuss the pros and cons of going with 75W-140 case reconsider...