Tranny and Primary Oils - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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Old 05-23-2011, 09:51 AM   #1 (permalink)
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Tranny and Primary Oils

Just wondering what other oil could be used instead of the Harley Formula+ in the tranny and primary. I want something with the equivalent standards or better ofcourse. Looking for a product I could find closer to home instead of running to a Harley store 50 miles away. I do see some in the local parts stores but I want to know more about it before I start using it. Any knowledge of this would be appreciated.
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Old 05-23-2011, 09:59 AM   #2 (permalink)
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Some use transmission fluid in the primary. Some use gear lube in transmission. Go to the oil section and read posts till you decide what you want to use.
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Old 05-23-2011, 10:06 AM   #3 (permalink)
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Sorry, kind of new to the site and saw the oil section after i posted. Thanks!
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Old 05-23-2011, 10:23 AM   #4 (permalink)
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There is a search function at the top of the page also.
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Old 05-23-2011, 12:02 PM   #5 (permalink)
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A non-energy converving 20w50 oil is fine. Synthetic or dino. If running trans fluid, Dextron-III is best. Don't recommend using Type-F, as it lacks lubrication qualities and you have bearings in that primary. I've run most if not all of them, and just use 20w50 motor oil or Dextron-III.
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Old 05-23-2011, 03:11 PM   #6 (permalink)
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im running castrol vtwin 20w-50 synthetic in the engine & primary and royal purple 75-90 synthetic in the tranny. any of these can be bought at your local auto parts store. (autozone,pepboys,advanced etc.)
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Old 05-23-2011, 03:18 PM   #7 (permalink)
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belray in tranny and primary here
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Old 05-26-2011, 10:22 PM   #8 (permalink)
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Mobil 1 v twin 20w50 in all 3 holes.
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Old 06-05-2011, 10:25 PM   #9 (permalink)
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Quote:
Originally Posted by Gliderider View Post
Just wondering what other oil could be used instead of the Harley Formula+ in the tranny and primary. I want something with the equivalent standards or better ofcourse. Looking for a product I could find closer to home instead of running to a Harley store 50 miles away. I do see some in the local parts stores but I want to know more about it before I start using it. Any knowledge of this would be appreciated.
I've used Amsoil in bikes since the late 60's and have had good mresults. You can buy amsoil at dealers but costs more.I joined amsoil as a member and order on line and gets ups to me in a couple of days and less expensive than at dealer cost. Hope this helps. vrod.
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Old 06-13-2011, 11:39 PM   #10 (permalink)
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Well doin MY first oil change on this bike since I bought it. its a 08 road king with almost 21K miles now..
I finally decided with
AMSOIL SYN 20W50 for the Engine
Redline Shockproof Heavy for Tranny
AMSOIL 75/90 for Primary

I've heard great this about this RedLine shockproof, so I thought'd give it a try.
I'm taking a trip up to Indiana from Texas starting July 1st, So thought I'd service her a bit for a 1200 ride.
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