Primary and Transmission Oil
Thread Starter
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Intermediate
Joined: Jul 2013
Posts: 47
Likes: 3
From: Flushing
Primary and Transmission Oil
I just recently purchased a 02 Fatboy and was wondering about how to change the transmission oil and the primary oil. And what do yall recommend for brands?
Outstanding HDF Member
Joined: Feb 2012
Posts: 2,298
Likes: 0
From: BC
here you go - all info you need is there 
http://www.dudeworld.com.au/HOWTO.PRIMARY.HTML
http://www.dudeworld.com.au/HOWTO.GEARBOX.HTML
http://www.dudeworld.com.au/HOWTO.ENGINE.HTML
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http://www.dudeworld.com.au/HOWTO.PRIMARY.HTML
http://www.dudeworld.com.au/HOWTO.GEARBOX.HTML
http://www.dudeworld.com.au/HOWTO.ENGINE.HTML
.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,605
Likes: 6,438
From: Honah Lee
Do it what Harley has figured out and you won't be wrong. Just get you a couple quarts of Harley formula +. Not worth fretting about saving a couple bucks or paying a few more for little benefit. Plus you can look at a new piece of chrome when you get it. If this a first Harley and first time oil change, get you a manual since it can be a little confusing under there. Check out my post 51 over here for a little hint on the transmission.
midgard attachments are great, but I would not use ATF in the primary since it does not provide the protection for that large inner primary bearing roller (even the maker of ATF says that) and also a quart is about 5 oz to much for your primary. also,your primary like mine probably has a tapered pipe thread that needs sealer or teflon tape.
https://www.hdforums.com/forum/softa...ils-oil-2.html
midgard attachments are great, but I would not use ATF in the primary since it does not provide the protection for that large inner primary bearing roller (even the maker of ATF says that) and also a quart is about 5 oz to much for your primary. also,your primary like mine probably has a tapered pipe thread that needs sealer or teflon tape.
https://www.hdforums.com/forum/softa...ils-oil-2.html
Last edited by Jackie Paper; Aug 1, 2013 at 06:38 PM.
Seasoned HDF Member
Joined: Mar 2007
Posts: 66,948
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From: TOAK western branch
They use engine oil in the tranny.
Thread Starter
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Intermediate
Joined: Jul 2013
Posts: 47
Likes: 3
From: Flushing
Gosh like 20-50 vr1 in the transmission? I am just looking to see what you guys have had success with as far as viscosities.
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Outstanding HDF Member
Joined: Feb 2012
Posts: 2,298
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From: BC
If you want to keep it simple just use Mobil1 v-twin 20/50 or the Valvoline v-twin 20/50 in all 3 holes (if you are wanting something heavier in the trans - use RedLine Shock Proof)
or..... you can continue reading the next 30 some posts of different opinions lol
cheers
or..... you can continue reading the next 30 some posts of different opinions lol
cheers
Last edited by Midgard; Aug 1, 2013 at 05:58 PM.
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Tourer
Joined: Jul 2012
Posts: 341
Likes: 0
From: Kendallville, IN
I'm not a fan of Formula+, it's just a 50 weight oil with little additive. I've had very good results as far as shifter feel, 1st gear clunk when cold and finding neutral, with Shell Rotella 15w40 in the primary and Redline heavy with shockproof in the trans. I love oil discussions. Lol. I'm obsessed with finding the best oils. Maybe I need a hobby...
