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Asymmetrical hub update kit for 915
Is the Asymmetrical hub update kit the way to go on a 915/40 transmission? I'm at the point of ordering parts for my rebuild Im doing and wondering if this is worth the extra money? The transmission will be with a highly modified early MFI engine, short gears, and will be used for both street and track.
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Mark Jung Bend, OR MFI Werks.com |
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10-27-2007, 08:36 AM
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I think this is a good question. Anyone ?
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Mark Jung Bend, OR MFI Werks.com |
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10-28-2007, 07:45 AM
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Registered
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
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See:
915 Trans rebuild-internal diagnosis However, I recall another discussion (but can't seem to find the thread) that the earlier symmetrical first was superior for some race applications. The symmetrical first does have a less robust 1/2 operating sleeve (shifting sleeve) - sliding sleeve (three-armed "spider") set up as the "spider" arms have more section in the later assymmetrical first arrangement. |
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10-28-2007, 08:51 AM
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Join Date: Oct 2003
Location: Sacramento, CA
Posts: 666
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I would update. I recently rebuilt a 915 with an early symmetrical setup. One arm on the spider hub was broken. Apparently quite common. If you have to spend money, why put the old version back in? I'm not sure if you can even buy a symmetrical 1-2 shift sleeve anymore but I could be wrong.
My tranny shifts great now and it was worth the money for the upgrade.
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Paul S "Those who say it cannot be done should not interrupt the people doing it" |
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10-28-2007, 09:21 AM
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Thank You Paul & Jim.
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Mark Jung Bend, OR MFI Werks.com |
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10-28-2007, 10:25 AM
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1957 Porsche 356 A Coupe 2.7 Short Stroke
1972 Porsche 72 Coupe
