Tranny Fluid?
Seasoned HDF Member
Joined: Feb 2008
Posts: 22,998
Likes: 11,439
The owners manual had said 32 oz however HD did put out a Service change.
The change was to drain and add 28 oz check then fill to proper level.
It seems some were draining it but not getting enough out dumping in the 32 oz and over filling them.
The change was to drain and add 28 oz check then fill to proper level.
It seems some were draining it but not getting enough out dumping in the 32 oz and over filling them.
Road Captain
Joined: Sep 2011
Posts: 541
Likes: 3
From: Sherwood Park AB Canada
How does that work for you. I was looking at it yesterday but ended up getting the Redline Shockproof that I've been using. I just completed a trip where I spent five of the ten days riding in 90+ degrees for hours. Thought the heavier (140) might be good for that but then thought it might get too heavy in cooler temps.
Road Warrior
Joined: Aug 2009
Posts: 1,432
Likes: 0
From: Central Florida, USA
I did, once, couldn't tell one bit of difference in mpg, noise, ease of shifting or any other factor the butt dyno could discern. Went back to the Syn3 and after 40,000 the tranny's still like new. I'm still convinced there may be miniscule differences in top-tier lubricants and gas, it's more a matter of keeping up with the maintenace at the recommended intervals versus what's going in the hole.
Supporter
Joined: Mar 2008
Posts: 4,419
Likes: 89
From: Vermont
+ 1 Works great for me..........Vermont mornings can range from 39-45F. Never an issue! Tranny is smooth as silk and quiet!
Last edited by Rickr01; Sep 26, 2013 at 10:49 AM.
Extreme HDF Member
Joined: Jun 2011
Posts: 14,731
Likes: 2,535
From: Mountain Top, Alabama
Studies have shown that people who use one quart of Mobil 1 V-Twin 20w50 in the Harley tranny love their Mothers most.
I use Mobil 1 V-Twin 20w50 in all three holes because my Mother said I was special!
I use Mobil 1 V-Twin 20w50 in all three holes because my Mother said I was special!
Ultimate HDF Member
Joined: Apr 2010
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From: Southern Oregon
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Grand HDF Member
Joined: Jan 2012
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From: Oklahoma
A couple of points.
1. If the transmission was properly serviced BEFORE the fluid change and you want it at the proper level after the change, replace the amount that came out. The capacity of a dry unit does NOT necessarily indicate the RE-FILL amount needed. If due to internal contours, only a pint drains out (intentional exaggeration) and you pour in a quart of new juice, the unit will be waay over filled. If the new manual says the transmission has a 32 ounce capacity BUT refill with 28 ounces and then add as necessary to get the proper dip stick reading, the instruction is totally consistent with the idea that not all of the old fluid will drain.
2. Multi-viscosity lubes. A 75W-anything (75W-90, 75W-140, 75W-250) will only get as thick as a 75 lube when cold. The other number says how thin it will get when hot. If you are worried about flow when cold, it is the 75 part of the spec that you want to adjust, not the other number. Second, Gear lube viscosity uses a different scale than does motor oil. Using a viscosity test would show that 20-50 motor oil is about the same viscosity as 75-140 gear oil. That is just the way the SAE does it in an attempt to prevent confusing the lubes so that gear oil doesn't go into engines.
1. If the transmission was properly serviced BEFORE the fluid change and you want it at the proper level after the change, replace the amount that came out. The capacity of a dry unit does NOT necessarily indicate the RE-FILL amount needed. If due to internal contours, only a pint drains out (intentional exaggeration) and you pour in a quart of new juice, the unit will be waay over filled. If the new manual says the transmission has a 32 ounce capacity BUT refill with 28 ounces and then add as necessary to get the proper dip stick reading, the instruction is totally consistent with the idea that not all of the old fluid will drain.
2. Multi-viscosity lubes. A 75W-anything (75W-90, 75W-140, 75W-250) will only get as thick as a 75 lube when cold. The other number says how thin it will get when hot. If you are worried about flow when cold, it is the 75 part of the spec that you want to adjust, not the other number. Second, Gear lube viscosity uses a different scale than does motor oil. Using a viscosity test would show that 20-50 motor oil is about the same viscosity as 75-140 gear oil. That is just the way the SAE does it in an attempt to prevent confusing the lubes so that gear oil doesn't go into engines.
Road Warrior
Joined: Jul 2009
Posts: 1,979
Likes: 2
From: Northern Colorado
Get her good and hot, drain it as best as you can, pour in one quart (32oz) of 75W-140 GL-5 synthetic gear oil of your choice, close it up and forget about it! Change it at 20K miles OR once a year, whichever comes first
Last edited by NoCoLoco; Oct 21, 2013 at 03:42 AM.
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