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Found My 9N Transmision Problem

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Sean (TX)

10-01-2007 14:55:07




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This is what I found when I pulled the main shaft and then the counter shaft....The idle gear shaft was sliding out and rubbing on the counter shaft gear.

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If you look at these diagrams you will notice that the reverse idle gear is mounted to the reverse idle gear shaft and transmission housing with a part #26. Shaft Lock Pin....Well I didn't find the pin when I drained the oil. The gear looks like its a bit chewed up. Not the teeth but the inner part around the bushing.

Looks like I need to shop for some parts.. Going to replace bearings and seals while I am in here. All a bit pitted and not to bad considering it is 66 years old.
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Sean (TX)

10-01-2007 19:29:09




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 Re: Found My 9N Transmision Problem in reply to Ed S. (IL), 10-01-2007 14:55:07  
I can see the bolt in this pic.
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Sean (TX)

10-01-2007 19:24:37




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 Re: Found My 9N Transmision Problem in reply to JMOR, 10-01-2007 14:55:07  

Tex - Driftwood said: (quoted from post at 21:50:12 10/01/07) Good find!!

so im looking at the diagram trying to figure out how everything worked and what was happening without that pin in there?? and then what would have happened eventually had you not taken the thing apart?


Im pretty sure that pin sheared off. Ill look at the tranny housing Tuesday. Im pretty sure the bolt is there. That shaft should be centered under the idle gear(its sliding out in the pic). The gear spins on the shaft.. Not sure what might have happened the gear it was rubbing on was keeping the shaft from falling out.

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Sean (TX)

10-01-2007 19:09:48




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 Re: Found My 9N Transmision Problem in reply to Chris S., 10-01-2007 14:55:07  

Joe (IN) said: (quoted from post at 20:26:01 10/01/07) Huh! What do you know about that? Looks like my guess was wrong! Have you taken a little 1/8" pipe plug lookin' sort of thing out of the left side of the transmission at any point? If so, that was your missing pin. It is installed from the outside and more than one guy has made the mistake of thinking it was the place to check the trans. fluid level and pulled her out. If the shaft happens to move just a little while the pin is out, you've got problems. If the teeth and bushing on the gear are OK, don't worry about it. The web of the gear can have some scars and not cause a problem. While you're there, definitely replace the bearings and races. After you do, you won't have to worry about that transmission again in your lifetime. If you need the pin, John Smith can hook you up for $10.
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Now that you mention it I remember some one taking that out in a old post. No wonder I didnt find it. Im going to have a look at the case Tuesday. I stuck a nail in there and it was a dead end. It could have sheared off....Ill find out.

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Tex - Driftwood

10-01-2007 18:50:12




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 Re: Found My 9N Transmision Problem in reply to Sean (TX), 10-01-2007 14:55:07  
Good find!!

so im looking at the diagram trying to figure out how everything worked and what was happening without that pin in there?? and then what would have happened eventually had you not taken the thing apart?



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Joe (IN)

10-01-2007 17:26:01




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 Re: Found My 9N Transmision Problem in reply to Sean (TX), 10-01-2007 14:55:07  
Huh! What do you know about that? Looks like my guess was wrong! Have you taken a little 1/8" pipe plug lookin' sort of thing out of the left side of the transmission at any point? If so, that was your missing pin. It is installed from the outside and more than one guy has made the mistake of thinking it was the place to check the trans. fluid level and pulled her out. If the shaft happens to move just a little while the pin is out, you've got problems. If the teeth and bushing on the gear are OK, don't worry about it. The web of the gear can have some scars and not cause a problem. While you're there, definitely replace the bearings and races. After you do, you won't have to worry about that transmission again in your lifetime. If you need the pin, John Smith can hook you up for $10.

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