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Old 09-20-2008, 10:54 PM
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David Kirkham David Kirkham is offline
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Join Date: Mar 2001
Location: Provo, Ut
Cobra Make, Engine: Kirkham, 427
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Quote:
Originally Posted by vettestr View Post
David,
I am sure you looked for the reasons the throw out bearing units failed. When the dust settled do you have a thought or two why or what failed. Thanks Jeff C
All of the units failed with bad seals. McLeod told us we couldn't use DOT 4 brake fluid as that would eat their seals. I was dumb and believed them. We then used normal DOT 3 in the clutches and they still failed. No hope. I have seen that milky, dark, nasty fluid many, many times--too many times, in fact. Many of the seals were literally eaten, crumbling, and melting.

We finally called Parker and talked to a seal expert. He told us the seals had to be ethylene-propylene that is "sulfur cured" and that most people didn't do it because it was expensive. I can tell you the seals were not as expensive as pulling the transmission.

David
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David Kirkham, President Kirkham Motorsports
Manufacturer Aluminum Body Kit Cars and supplier to Shelby* for their CSX4000, CSX7000, and CSX8000 289 and 427 Cobra
*Kirkham Motorsports is not affiliated with Ford or Carroll Shelby or any of their trademarks.
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