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> Hyduralic Throw-Out Bearing
alpha434
post Aug 13 2007, 11:32 PM
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Ok. He's got everybody's recommendation about it being a failure point.

Now. If you want to comment any further, lets make it about where to get one or how to go about doing it. Repeating over and over again about what a bad idea it is doesn't help anything and it may piss the asker off.

It's not like he's talking about making it out of titanium or anything. And he may have a good reason for wanting to do that over an external hydraulic slave cylinder. Maybe a reason that he doesn't care to disclose.

And on the other hand, if the recommendations in regard to the throw-out bearing being a failure point have helped. The asker should state so, so that it would be reasonable to give advice in that direction.
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Downunderman
post Aug 14 2007, 02:31 AM
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Don't get it Krusty, the link is to the Tilton concentric throw out bearing. The only failures I have heard of is in formula type race cars where the thing is surrounded by the oil tank cast into the bell housing. In which case you have to use a different seal which will handle the higher temperatures. All manner of Saabs have used them for years without problem.
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TimT
post Aug 14 2007, 03:07 AM
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So jeep used a crap concentric hydraulic throw out bearing....no real surprise there.

FWIW we own a GT3RS which was run at LeMans a few years ago. This car came from Porsche with a Tilton clutch and hydraulic t/o bearing. I suppose if Porsche supplies there racecars with that equipment it should be some pretty good shiznits. You know to survive basically 24 hours of full throttle numerous upshifts/downshifts abuse.... The t/o bearing clutch are pretty bulletproof.... thought the axles are another thing alltogether ( and at $5000 (IMG:style_emoticons/default/blink.gif) )

Tilton used to make a 901 specific t/o bearing along with a 6 bolt flywheel... but those items have disappeared from there selection. Wevo now makes the hydraulic t/o bearings.
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Loser_Cruiser
post Aug 14 2007, 03:59 AM
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QUOTE(Cap'n Krusty @ Aug 12 2007, 08:07 PM) *

90s Jeeps had 'em, and they were a weak point. The Cap'n


I own a 91' jeep wrangler renegade and just this last year had to replace the throw out bearing, but this was after 16 years and about 125k miles. More than half of its life spent in L.A. traffic. Other than being a PITA to change when it does fail. it seems like a good enough design. and in a 914 it wouldnt be that tough to fix. Sounds like less time trying to fabricate a way to use the slave cylinder as well.
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Downunderman
post Aug 15 2007, 01:24 AM
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Tim,

It seems that Porsche sell the same axles up there as they do down here. We use the used ones for practice starts, then toss them. For a race car about as useful as legs on a snake.

Cheers,

H
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