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10-20-2016, 09:04 AM | #21 |
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Re: 1939 Trans Rebuild - Shafted Again! (with a twist)
Wonder why the manufacturer of those .747 shafts can't just make them .749 instead?
I guess they have hundreds of .747 shafts they now need to sell, no matter what. Where and who makes them? |
10-20-2016, 01:05 PM | #22 |
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Re: 1939 Trans Rebuild - Shafted Again! (with a twist)
Probably because they started with some standard .750 stock material - needed to take of .003 to get to a desired surface finish. (And the finish is NOT very good if you ask me!).
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10-20-2016, 02:23 PM | #23 |
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Re: 1939 Trans Rebuild - Shafted Again! (with a twist)
McMaster Carr catalog shows some precision shaft material with the right diameter tolerance and hardness with machinable ends (2") in lengths from 10" to 36". Might be an option.
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10-20-2016, 03:24 PM | #24 |
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Re: 1939 Trans Rebuild - Shafted Again! (with a twist)
bill, could you post an item number, i couldn`t find the material you referenced.
thanx, tom |
10-20-2016, 03:33 PM | #25 |
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Re: 1939 Trans Rebuild - Shafted Again! (with a twist)
When I rebuilt my '39 transmission for my '37 a few years ago I used Loctite to seal the ends not silicone.The Loctite is green and made for this type of application and yes they can be removed but it does work and has for last 10 years.
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10-20-2016, 04:17 PM | #26 |
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Re: 1939 Trans Rebuild - Shafted Again! (with a twist)
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10-20-2016, 04:56 PM | #27 | |
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Re: 1939 Trans Rebuild - Shafted Again! (with a twist)
Quote:
This is exactly what I used to make these shafts. It is not a cheap material, but when you think about all the other costs (gears, synchros, etc), not a bad way to go. I've found that you really need carbide drills to drill the 1/4" through hole, the center drilling can be done with cobalt bits and the taps were done with normal taps (the centers are not hard). |
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10-20-2016, 04:59 PM | #28 | |
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Re: 1939 Trans Rebuild - Shafted Again! (with a twist)
Quote:
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10-20-2016, 05:21 PM | #29 | |
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Re: 1939 Trans Rebuild - Shafted Again! (with a twist)
Quote:
http://www.mcmaster.com/#steel-preci...hafts/=14omrep Well that link gives you too many options; you have to click on the last item: Linear Motion Shafts with Machinable Ends Last edited by BillM; 10-20-2016 at 05:27 PM. Reason: Added info for link. |
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10-26-2016, 04:21 PM | #30 |
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Re: 1939 Trans Rebuild - Shafted Again! (with a twist)
My machinist (retired machinist neighbor) couldn't tap my shafts, so he silver soldered studs in them. I used the green loctite around the shafts and on the nuts. I put two paper gaskets skimmed with sealant and filled the void at the shaft ends with sealant. Hoping all this together will eliminate the transmission leaks.
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10-26-2016, 08:06 PM | #31 | |
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Re: 1939 Trans Rebuild - Shafted Again! (with a twist)
Quote:
D |
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10-26-2016, 08:13 PM | #32 |
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Re: 1939 Trans Rebuild - Shafted Again! (with a twist)
Now if you can stop the leaking that will eventually come from the bearing retainer and clam area that will be great ; o)
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