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| Cranks and pilots https://slantsix.org/forum/viewtopic.php?t=17162 |
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| Author: | Luthastro [ Fri Apr 21, 2006 8:54 am ] |
| Post subject: | Cranks and pilots |
Apparently there is a problem matching crankshaft ends to traansmissions at some point through the year models. I found the following statement that doesn't make sense to me: Quote: The crankshafts from 1961-1968 used a small pilot 1.960 od/ 1.530 id. They were a forged casting as well. Crankshafts after 68-76 used the large pilot 2.160 od/ 1.805 id and are all forged castings.
Shouldn't "Crankshafts after 68-76" say "Crankshafts during 68-76?"Finally, doesn't this mean that pre '68 and post '68 cranks and transmissions don't mix? Post Finally, I found this on my own hard drive and haven't located where I got it yet. |
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| Author: | DusterIdiot [ Fri Apr 21, 2006 9:19 am ] |
| Post subject: | Hub and pocket.... |
Up to 1967 has the small crank hub and pocket. From 1968 forward uses the larger pocket. This means: 1)1968+ Engines can use any tranny, provided you have the correct flywheel for your crank, or use an annular pocket ring for the crank if using a pre-68 torque convertor . 2)Pre-68 engines can't accept late style torque convertors, you can either swap the crank to a post-67, or get a custom torque convertor (except in the case of the 1978+ Lock Up tranny which is post-67/big pocket only) -D.Idiot |
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| Author: | Luthastro [ Fri Apr 21, 2006 10:34 am ] |
| Post subject: | Re: Hub and pocket.... |
Quote:
This means:
Thanks.1)1968+ Engines can use any tranny, provided you have the correct flywheel for your crank, or use an annular pocket ring for the crank if using a pre-68 torque convertor . 2)Pre-68 engines can't accept late style torque convertors, you can either swap the crank to a post-67, or get a custom torque convertor (except in the case of the 1978+ Lock Up tranny which is post-67/big pocket only) -D.Idiot Oops, I failed to specify that I'm looking about manual transmissions. |
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| Author: | DusterIdiot [ Fri Apr 21, 2006 11:50 am ] |
| Post subject: | Re-edit... |
Early engine use a pre-68 flywheel... Post-68 use a "late" flywheel... Spend some $$$ and have a machinist make a ring so you can 'bush' a late flywheel to use on the early crank (not my first choice for the $$$). -D.Idiot |
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| Author: | Luthastro [ Fri Apr 21, 2006 12:58 pm ] |
| Post subject: | Re: Re-edit... |
Quote: Early engine use a pre-68 flywheel...
Ack. I saw the word pilot and thought they were talking about the pilot on the end of the shaft. I hadn't paid attention to the actual measurements involved.Post-68 use a "late" flywheel... Spend some $$$ and have a machinist make a ring so you can 'bush' a late flywheel to use on the early crank (not my first choice for the $$$). -D.Idiot Apparently all end-of-shaft pilot bearings are the same? |
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