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 Post subject: Driven shaft
PostPosted: Sat Jan 24, 2015 7:33 pm 
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Joined: Sat Jan 29, 2011 5:48 pm
Posts: 873
Have a project I've been working on and ran into a small problem.. The driven shaft which is my
Forward/reverse set up is buggered. Probably a ton of money for a new one but was looking
For input on who might make a new one. IF anybody knows any other options please let me know. Here are some pics.


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 Post subject: Re: Driven shaft
PostPosted: Sat Jan 24, 2015 7:43 pm 
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Joined: Tue Jan 17, 2012 3:19 am
Posts: 7698
Location: Hope, B.C Canada
No problem , sort of. The same thing happened to my racecar transmission.
What I did was take my dog rings and gears to a grinding shop.
The gears on a ft200 gearbox had 7' of angle ground on the dogs.
Not sure what the angle is on a oddy gearbox.
Unfortunately your gear has the corner almost knocked off but there is still some left. It might be ok.
They should be able to grind back about 1/3 and be ok.
Otherwise you are screwed. No one makes parts for these anymore.


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 Post subject: Re: Driven shaft
PostPosted: Sat Jan 24, 2015 8:34 pm 
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Joined: Sat Jan 29, 2011 5:48 pm
Posts: 873
The pic doesn't show it well but the shaft splines are also hurting. It's not out of an oddy but if that is what it looks like maybe I can get oddy trans parts. I will try for some better pics. I have a video I will upload to YouTube. The selector doesn't go all the way to reverse.


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 Post subject: Re: Driven shaft
PostPosted: Sat Jan 24, 2015 9:06 pm 
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Joined: Sun Dec 24, 2006 5:58 pm
Posts: 2319
Location: near NJ rider
What's it out of?

Hard to tell how big it is?

Was it allowed to pop out of engagement? Should be locked, so it cant slip.


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 Post subject: Re: Driven shaft
PostPosted: Sat Jan 24, 2015 9:23 pm 
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Joined: Mon Dec 15, 2003 2:40 pm
Posts: 22512
Location: Chicago
I am just looking at parts in a pictures but tell me if I am viewing this properly or not, in the below pic the splines damage is completely irrelevant the damage was caused to the splines by the bent shifting dogs rotating over the splines, the gear on the left never slides on the damaged part of the splines, the gear on the right slides over to meet up with the left gear? so you could repair the parts that contact each other to shift gears and it will then work again?

Image

If I am correct the splines don't matter and all that needs addressed is the shift dogs that damage looks to be out of my capabilities so I would be calling on our good friend Speedchaser to see if his expertise could save those parts. If the damage was less I might try to dress up the damaged ends a little.

Someone abused those poor gears, what are they out of ?


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 Post subject: Re: Driven shaft
PostPosted: Sat Jan 24, 2015 9:31 pm 
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Joined: Sat Jan 29, 2011 5:48 pm
Posts: 873
I've been told it's a chenowth hear box out of a mini mag. Somebody else said a name I can't remember. I will look for the pic. Here is what the internals look like and a pic of the outside.


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 Post subject: Re: Driven shaft
PostPosted: Sat Jan 24, 2015 9:38 pm 
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Joined: Sat Jan 29, 2011 5:48 pm
Posts: 873
The gears on either side are stationary the piece in the middle is attached to a fork and moves up and down to shift from forward to neutral to reverse. It won't move all the way into reverse from damage on the splines. I will post a short video it might explain it better.


http://youtu.be/8peNjaJ4ED8


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 Post subject: Re: Driven shaft
PostPosted: Sat Jan 24, 2015 9:42 pm 
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Joined: Sun Dec 24, 2006 5:58 pm
Posts: 2319
Location: near NJ rider
Oh..you can totally fix that!

It looks like either it was allowed to pop out,(shifter not positively locked) or tried to put into gear with the input still spinning.

Like Hoser said, once the dogs where damaged it damaged the splines.

Was it Coleman?

Dremel it back together and lock the shifter....ride.


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 Post subject: Re: Driven shaft
PostPosted: Sat Jan 24, 2015 10:11 pm 
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Joined: Sat Jan 29, 2011 5:48 pm
Posts: 873
That sounds good. I'm thinking it popped out of gear as there was no spring behind the ball in the detent(sp) on the shifter mechanism. I'm also thinking I have to disassemble the parts to do the job thoroughly?? Those gears on either side have in and out play, does that sound right?those videos didn't work let me try again.


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 Post subject: Re: Driven shaft
PostPosted: Sat Jan 24, 2015 10:20 pm 
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Joined: Mon Dec 15, 2003 2:40 pm
Posts: 22512
Location: Chicago
Rppjr wrote:
That sounds good. I'm thinking it popped out of gear as there was no spring behind the ball in the detent(sp) on the shifter mechanism. I'm also thinking I have to disassemble the parts to do the job thoroughly?? Those gears on either side have in and out play, does that sound right?


Remove a bearing look at the end of the gear it has snap rings on the shaft holding the gears in place?


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 Post subject: Re: Driven shaft
PostPosted: Sat Jan 24, 2015 10:28 pm 
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Joined: Sat Jan 29, 2011 5:48 pm
Posts: 873
http://youtu.be/fG-JW9j0GdM


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 Post subject: Re: Driven shaft
PostPosted: Sat Jan 24, 2015 10:30 pm 
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Joined: Sat Jan 29, 2011 5:48 pm
Posts: 873
I will remove a bearing and check and see.
Bob


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 Post subject: Re: Driven shaft
PostPosted: Wed Jan 28, 2015 11:29 pm 
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Joined: Sat Jan 29, 2011 5:48 pm
Posts: 873
Took the bearings, gears and selector off the shaft. One of the brass bushings was not seated in the gear. You can actually slide it in and out of the gear. Also on the shifting mechanism the detent the ball goes in doesnt line up. It is so far off the ball actually started to wear a spot where the hole should of been drilled. Am going to clean up all the parts and reassemble. Some good news is I found a guy on minibuggy.net who may have some parts for this transmission. Some updated pics.


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 Post subject: Re: Driven shaft
PostPosted: Thu Jan 29, 2015 12:30 am 
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Joined: Tue Jan 17, 2012 3:19 am
Posts: 7698
Location: Hope, B.C Canada
It just hit me right between the eyes when I watched the first You Tube video link you posted.
If those two gears are the same number of teeth then just switch the gears and flip the dog ring.
Then all the good mating surfaces will mate.
If the gears are different number of teeth you will have to get them ground at a grinding shop.
The splined shaft can be dressed with a file and some patients.


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 Post subject: Re: Driven shaft
PostPosted: Thu Jan 29, 2015 12:50 am 
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Joined: Sat Jan 29, 2011 5:48 pm
Posts: 873
Yep, I had the same idea. Gears have the same number of teeth and are the same dimensions. If the member on the other forum comes through I will pick up spare parts as well. As far as the brass bushing what would be the reason behind it coming loose?? Wear?? The selector has color changes on one side of it, so something got very hot.


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 Post subject: Re: Driven shaft
PostPosted: Thu Jan 29, 2015 12:55 am 
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Joined: Tue Jan 17, 2012 3:19 am
Posts: 7698
Location: Hope, B.C Canada
Rppjr wrote:
Yep, I had the same idea. Gears have the same number of teeth and are the same dimensions. If the member on the other forum comes through I will pick up spare parts as well. As far as the brass bushing what would be the reason behind it coming loose?? Wear?? The selector has color changes on one side of it, so something got very hot.


Possible the yoyo ran it out of oil.


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 Post subject: Re: Driven shaft
PostPosted: Thu Jan 29, 2015 10:33 am 
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Joined: Sat Jan 29, 2011 5:48 pm
Posts: 873
Quite possible, the kid wasn't the best at maintenance, the rest of the buggy was pretty hammered. Never bought one that had so many problems. I have been going through it and I've found that if I don't tear into a part of it then it will bite me in the a$$ later on.


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 Post subject: Re: Driven shaft
PostPosted: Sun Mar 01, 2015 11:57 am 
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Joined: Sat Jan 29, 2011 5:48 pm
Posts: 873
I had the gears and shaft cleaned up. I also found a guy in Northern Ca. Who has parts for these transmissions. I ended up getting the two gears and the sliding piece for 70$.
He has a Triple E Desert Star 2 for sale as well. Comes with a Rotax 670 a spare 440 Engine , dune and desert tires. The desert tires are mounted on 10" Champion Bead Locks. He has two complete transmissions like mine but is selling them with the car. He also explained to me that he has fitted VW diffs in the cases as well. All the parts are there the buggy needs to have some reassembly. He was going through it and life got in the way. I have some pics and contact info if anyone is interested.


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 Post subject: Re: Driven shaft
PostPosted: Sun Apr 19, 2015 10:12 pm 
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Joined: Sat Jan 29, 2011 5:48 pm
Posts: 873
Transmission is back together and in. Forward and reverse both work.


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 Post subject: Re: Driven shaft
PostPosted: Sun Apr 19, 2015 11:01 pm 
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Joined: Sun Dec 24, 2006 5:58 pm
Posts: 2319
Location: near NJ rider
Cool, Good luck!


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