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Old 03-08-2013, 02:40 PM   #1
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Rear shift-lever oil leak

Can these be fixed? I read that this means new trans housing, but find that difficult to believe.

Thanks.
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Old 03-08-2013, 02:55 PM   #2
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It sound like you went to a friendy porsche dealer, I'd get a second opinion from a good Indy garage.
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Old 03-08-2013, 03:11 PM   #3
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The reason this type of leak is expensive to fix (requires a new tail housing unit) is because Porsche used a blank pressed in bronze plug in the side of the tailhousing that is then machined in place to accept the shaft. There are no aftermarket replacement bushings available, and machining out a new plug requires a lot of specialized tooling fixtures that you simply cannot buy.
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Old 03-08-2013, 03:23 PM   #4
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The reason this type of leak is expensive to fix (requires a new tail housing unit) is because Porsche used a blank pressed in bronze plug in the side of the tailhousing that is then machined in place to accept the shaft. There are no aftermarket replacement bushings available, and machining out a new plug requires a lot of specialized tooling fixtures that you simply cannot buy.
That's a bummer. I wonder if slathering the bushing with a heavy petroleum product like cosmoline might stem the tide a bit...
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Old 03-08-2013, 05:41 PM   #5
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Not really, they start to leak because the shaft has worn the bushing out of round, so smearing something over it will only slow it for a bit before it starts again. And because of the wear, shaft movement will only get it more out of round with time and use.

Fix it.
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Old 03-08-2013, 08:24 PM   #6
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It sound like you went to a friendy porsche dealer, I'd get a second opinion from a good Indy garage.
Do you work on these leaks? I'll ask around but there's only a couple import mechanics here I would trust with a Porsche.

Bummer!!
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Old 03-08-2013, 09:59 PM   #7
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Awesome.

The more I see this kind of stuff, the more I think either someone was asleep at the wheel over in German land or Porsche let the interns have a crack at designing a car when they decided to do the Box.

I've got this leak too and there is absolutely no way I'm replacing a transmission case to "fix" a pressed in bushing that someone thought was a legit idea to machine in place. Last time I checked, a bushing, by design, is a wear product. What were they thinking?!?
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Old 03-08-2013, 10:05 PM   #8
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The best picture I have right now. I guess I'm going to have to start looking for a solution (thats doesn't involve throwing away a perfectly good case)
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Old 03-08-2013, 10:06 PM   #9
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Old 03-09-2013, 12:23 AM   #10
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Maybe GBox has a fix. Give them a call and see if they can help, you never know until you try.
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Old 03-09-2013, 05:40 AM   #11
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Please post a pic of the other side with the shift levers. Yours does not look like the shift lever from the pic with the orange box.
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Old 03-09-2013, 06:30 AM   #12
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Was going to say I'd grab a better picture today but just realized I've already scrubbed the transmission down to get it ready to go back in. Is there some way other than leaking that one could determine if that bushing is on its way out?
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Old 03-09-2013, 08:08 AM   #13
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Can these be fixed? I read that this means new trans housing, but find that difficult to believe.

Thanks.
If caught in time maybe a new bushing can be made.
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Old 03-09-2013, 09:16 AM   #14
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If caught in time maybe a new bushing can be made.
Problem is that the way the factory machines the bushing uses fixtures rather than the opening in the case to locate center of the shaft opening. Basically, Porsche designed the tailhousing to be tossed if the shaft starts to leak.
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Old 03-09-2013, 03:06 PM   #15
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Anyone have a source for a new or rebuilt housing besides Pelican? It's a 6-speed.
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Old 03-09-2013, 05:43 PM   #16
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Anyone have a source for a new or rebuilt housing besides Pelican? It's a 6-speed.
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Old 03-09-2013, 07:34 PM   #17
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Old 03-09-2013, 08:15 PM   #18
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Originally Posted by sam c. View Post
Was going to say I'd grab a better picture today but just realized I've already scrubbed the transmission down to get it ready to go back in. Is there some way other than leaking that one could determine if that bushing is on its way out?
My shift lever wobbles quite a bit if I grab it and move it. Shifts great, but its a pretty decent leak at this point. If yours is not leaking, I would not even look at it cross and show it the respect it needs.
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Old 03-10-2013, 01:09 AM   #19
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Thats good advice. At the same time tho, I think I'll keep an eye out for one with a trashed bushing and the owner has already replaced (one thats just a paper weight in someone's garage). I know some guys that do some pretty great things on CNC machines that can prob come up with some extremely cost effective solutions. Maybe a bushing removal kit like the parts that were developed for the IMS bearing.
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Old 03-13-2013, 05:08 AM   #20
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Just the facts.....

New tranny housing from Porsche.....$750.00

Tranny exchange from Porsche........$6600.00

New shift lever if shaft has wear......$407.00

When calling a few local trans shops two said they work on old & obsolete trannys all the time, and were sure they could size & replace the bearing since the outer seal is available. They said it's typical for some parts to not be available, and they match parts like that up by size and ream them to fit.

A few said Porsche???? Hell no!!!!!

All I gots to do is pull it!
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