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Old 05-17-12, 07:22 PM   #1
nhawlman
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*** How I fixed my one dollar Antique Dana bike transmission ***

If you ever find one of these scarce items, my page may be helpful:

http://www.gardengrapevine.com/Dana3...onRepairs.html
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Old 05-17-12, 07:24 PM   #2
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ooops !!

http://www.gardengrapevine.com/Dana3...onRepairs.html
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Old 05-17-12, 07:25 PM   #3
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Double ooops !!!
Paste two lines together :

http://www.gardengrapevine.com/
Dana3speedBikeTransmissionRepairs.html
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Old 05-18-12, 09:57 AM   #4
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Ah, so you found out what it was! Interesting design, isn't that how automatic geatboxes on cars work?
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Old 05-18-12, 10:04 AM   #5
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That looks like a bicycle product designed by someone who didn't ride bikes. What does it weigh?

Interesting solution to the gear problem. Makes you appreciate derailleurs & sprockets all the more. I want one for my project beach cruiser- thanks for posting.
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Old 05-18-12, 10:04 AM   #6
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Ah, so you found out what it was! Interesting design, isn't that how automatic geatboxes on cars work?
It's a planetary gear set and, yes, that's how most automotive automatic transmissions work but it's also how IG hubs work too. This is basically an IGH installed in the bottom bracket instead of the rear hub.

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Old 05-18-12, 10:08 AM   #7
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Double ooops !!!
Paste two lines together :

http://www.gardengrapevine.com/Dana3...onRepairs.html
You are allowed to edit your posts to fix things, like so ^
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Old 05-18-12, 04:47 PM   #8
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It's a planetary gear set and, yes, that's how most automotive automatic transmissions work but it's also how IG hubs work too. This is basically an IGH installed in the bottom bracket instead of the rear hub.
Correct me if I'm wrong, but don't most IGHs feed drive both ways through the planetary gear to get an increase and a reduction? I'm wondering why they didn't try and do that instead, seeing as it would've eliminated two of the three sets of planetary gears (which I'd imagine are damn heavy), but still provided 3 speeds.
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Old 05-18-12, 05:16 PM   #9
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Correct me if I'm wrong, but don't most IGHs feed drive both ways through the planetary gear to get an increase and a reduction? I'm wondering why they didn't try and do that instead, seeing as it would've eliminated two of the three sets of planetary gears (which I'd imagine are damn heavy), but still provided 3 speeds.
Yes, that's how 3-speed IGHs work.
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Old 05-19-12, 05:21 AM   #10
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Just... wow.
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Old 05-22-12, 07:33 AM   #11
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You are allowed to edit your posts to fix things, like so ^
WOW !!
I'm really impressed;
9,813 posts !
You wrote the Book !

I'm still reading the PREFACE:
"Peter Rabbit Eats Fish, Alligators Catch Eels. - Eels Catch Alligators, Fish Eat Raw Potatoes"
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Old 06-12-13, 08:27 AM   #12
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I know it's an old thread, but I'd love to see a video of that transition working. My brain hurts just thinking about it.
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