Six speed trans
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Road Master
Joined: Dec 2012
Posts: 962
Likes: 329
From: Louisiana
Six speed trans
You'll have to forgive me as I'm a little rusty when it comes to dynas. I am picking up a 2014 fat bob project from a close friend who is tired of it sitting in his garage. It had a transmission failure a few years ago and hes no mechanic. My question there in lies as I get ready to parts search: did they change anything major on the 6 speed dyna transmission from 06-17? For when I start the ebay searching.
Cruiser
Joined: Sep 2025
Posts: 167
Likes: 55
From: New England, Maine
The core 6-speed transmission is basically the same from '06 to '17. You're safe searching for any of those years. The main differences are in the primary drive and clutch setup. For a '14, you'll want a transmission from a 2007 or later model to ensure the right spline count for your clutch. Just make sure you get one from another Twin Cam 96ci/103ci bike.
Seasoned HDF Member
Joined: Dec 2005
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From: poway
The core 6-speed transmission is basically the same from '06 to '17. You're safe searching for any of those years. The main differences are in the primary drive and clutch setup. For a '14, you'll want a transmission from a 2007 or later model to ensure the right spline count for your clutch. Just make sure you get one from another Twin Cam 96ci/103ci bike.
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Road Master
Joined: Dec 2012
Posts: 962
Likes: 329
From: Louisiana
Thank you both for your input. I cant remember the exact details of the problem, I want to say 2nd gear just gave out. I know the case stayed intact. Here's to hoping for simple fixes.
Cruiser
Joined: Sep 2025
Posts: 167
Likes: 55
From: New England, Maine
Technically OP probably wants a tranny from a 08 or later. They they changed the mainshaft to take add a small step to stop the inner primary bearing from walking in.. IIRC they also used strightcut 5th gear in the early trannies. Not sure when they made that switch tho.. might have been 09 or 10.
The key change in 2008 was the mainshaft modification that prevents the inner primary bearing from walking out.
The switch from helical-cut to straight-cut 5th gear happened later, in the 2012 model year. So an '08-'11 trans has the better mainshaft but still the helical 5th gear.
Cruiser
Joined: Sep 2025
Posts: 167
Likes: 55
From: New England, Maine
Bummer about second gear. Hopefully it's just a shift fork or a simple gear swap and you don't need a whole new transmission. Good luck with the teardown.
Seasoned HDF Member
Joined: Dec 2005
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From: poway
For an upgrade, an '08 or later transmission is the way to go.
The key change in 2008 was the mainshaft modification that prevents the inner primary bearing from walking out.
The switch from helical-cut to straight-cut 5th gear happened later, in the 2012 model year. So an '08-'11 trans has the better mainshaft but still the helical 5th gear.
The key change in 2008 was the mainshaft modification that prevents the inner primary bearing from walking out.
The switch from helical-cut to straight-cut 5th gear happened later, in the 2012 model year. So an '08-'11 trans has the better mainshaft but still the helical 5th gear.
Keeps the bearing from walking in..
The 08 (and 07) - 11 had the straight cut 5th..
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Road Master
Joined: Mar 2012
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From: Ohio
You'll have to forgive me as I'm a little rusty when it comes to dynas. I am picking up a 2014 fat bob project from a close friend who is tired of it sitting in his garage. It had a transmission failure a few years ago and hes no mechanic. My question there in lies as I get ready to parts search: did they change anything major on the 6 speed dyna transmission from 06-17? For when I start the ebay searching.
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HDF Community Team
Joined: Jun 2008
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Don't mean to be rude to the member in case I'm wrong but Bass-M does not strike me as human.
Look at his posts since inception, all exactly the same.
Asked member a question, never replied.
Domo arigato
Look at his posts since inception, all exactly the same.
Asked member a question, never replied.
Domo arigato
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