Loose bearing race in my 915, what to do?

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Loose bearing race in my 915, what to do?

Postby gocart on Thu Aug 18, 2011 9:37 am

OK, I pulled out my '72 915 trans to replace fifth gear. Uh- oh, the bearing race in the center housing will spin when turned by hand. What are my options?
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Gordon Carter
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Re: Loose bearing race in my 915, what to do?

Postby Dave Diamond on Tue Aug 23, 2011 12:46 pm

Ambitious project Gordon - I'm sure one of the experts will reply, but I'm curious about whether you felt this rebuild was a manageable job? Or do you have special expertise in this? I have thought about trying to do something about my 915 synchros, but I have visions of having to take a basket of parts to somebody to put it back together. Good luck in any case.
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Re: Loose bearing race in my 915, what to do?

Postby gocart on Wed Aug 24, 2011 8:29 am

I'm no "expert" by any means, but I do have a bit of experience with Porsche mechanicals. I have had my Porsche's last transmission apart several times for refreshes over the years. I've rebuilt several VW transmissions as well. I also have all the special tools needed to do the job. This is probably not a job to learn on, unless you have an experienced friend to help you. Porsche transmissions are unique, complex, specialized pieces of machinery and require a certain expertise.

Look here for everything you want to know about rebuilding one. http://porsche.wikidot.com/system:page-tags/tag/tutorial
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Re: Loose bearing race in my 915, what to do?

Postby JERRY B on Thu Aug 25, 2011 2:06 pm

LOCKTITE 603 Will be your Huckle Berry, Make sure to use the recomended Cleaner & Primer with it, will fill a .005 gap
If it's worse than that they make other products to do the job :beerchug:
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Re: Loose bearing race in my 915, what to do?

Postby CoryM on Fri Nov 11, 2011 8:35 pm

Wevo has a fix for this, California Motorsports in Lake Havasu does too, both require machining of the case. They basically machine out an "8" shaped recess and insert a single machined steel piece to replace both bearing bores. Some other shops machine a ring and pin it in place. Maybe some of the transaxle shops that work on Desert buggies in El Cajon have a fix if you want to stay local. If it were my trans I'd pay to get it fixed right once...
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Re: Loose bearing race in my 915, what to do?

Postby LUCKY DAVE on Fri Nov 11, 2011 9:57 pm

I'm with Jerry on this one. The right glue will work fine.
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