Mon Jul 08, 2013 3:56 pm by Admin

For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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Dirty Clutch Fluid

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Dirty Clutch Fluid

Post  Rich L. on Thu Sep 13, 2012 12:20 pm

After a couple days of hard driving on track, my gears start to clash. It seems like the pedal has less travel and a quick bleed of the clutch fluid fixes the problem. The fluid that I get out is dark and feels different, like it's mixed with grease or oil. Running a half pint of fluid through the system cleans it up nicely and everything works right again.

The setup is a 1" Wilwood master in a Tilton pedal box with a remote mounted reservoir, LS1 throw-out bearing modded by TPC, SPEC fw/pp/disc, Motul RBF600 fluid and a remote bleeder. I pulled the inspection cover and everything looks nice and clean in there, no leaks evident.

Any ideas where/why/how the fluid is getting fouled?

Rich L.

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Join date : 2011-05-30
Location : Seattle

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Re: Dirty Clutch Fluid

Post  zeusrotty on Thu Sep 13, 2012 12:44 pm

Could you have a leaky master? It may be taking some of the dye out of the seals?


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Re: Dirty Clutch Fluid

Post  944-LT1 on Thu Sep 13, 2012 6:52 pm

Yeah, same here. Mine turned blackish after installing and bleeding. That was with the master mounted without an angle on the firewall. After I had an angled mounting plate made, I flushed it out and all is well. Best guess is either the seal is rubbing the inner bore of the master (because the angled adapter fixed mine) or what zeus said and its just assembly material/lube.

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Re: Dirty Clutch Fluid

Post  Rich L. on Fri Sep 14, 2012 12:40 am

Interesting. Thanks for the thoughts, Guys. I have to assume the angles are right given this pedal box I'm using. It's pretty much an ideal mounting situation for the master. I'll just keep bleeding it every couple of days on track and hope it clears up.

Rich L.

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Vetted world

Post  gamman on Mon Sep 17, 2012 12:35 am

This happens ALL the time with c5 vettes. I had a turkey baster for the clutch fluid and a tone of dot3 and dot4 cause the clutch pedal would stick to the floor. This in an area with 68' high summer temps. Redid all fluids didn't help much, used the cheap stuff cause the black would cause the need for a change more than time or heat. Thought that p cars were more immune to it cause nobody talked about it. They analyzed it and said it was clutch disc powder. Look up ranger method.

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Re: Dirty Clutch Fluid

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