SUPPORT OUR SPONSOR

Go Back   Club Cobra > Club Cobra Tech Areas > Transmission Talk

Welcome to Club Cobra!  The World's largest non biased Shelby Cobra related site!

  •  » Representation from nearly all Cobra/Daytona/GT40 manufacturers
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and nearly 1 million posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

Keith Craft Racing
Nevada Classics
Keith Craft Racing
Main Menu
Nevada Classics
Nevada Classics
MMG Superformance
MMG Superformance
Advertise at CC
Banner Ad Rates
MMG Superformance
MMG Superformance
MMG Superformance
November 2024
S M T W T F S
          1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30

Kirkham Motorsports

Reply
 
LinkBack Thread Tools Rate Thread Display Modes
  #1 (permalink)  
Old 06-17-2014, 11:08 AM
rodneym's Avatar
Full Blown Member
Visit my Photo Gallery
Premier Contributor
 
Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
Not Ranked     
Default Clutch fluid boiling?

When I take my Cobra out for a good drive (1 hr, 75 degree ambient temp), I notice that if I get off the fwy and into traffic, where water temps hits 100 C, the clutch gets a 'rub' feel close to the floor. I can also sometimes hear it, as a rub, not squeal. My pilot bushing was replaced recently. It only happens when I'm up to a 'good' temp.

The clucth fluid is indeed getting tinted, so I believe the fluid and/or hose is degrading due to heat, but what about the feel?

Does my description sound like the fluid could be boiling?

Clutch adjustment?
__________________
rodneym
Reply With Quote
  #2 (permalink)  
Old 06-17-2014, 11:44 AM
CC Member
Visit my Photo Gallery

 
Join Date: Oct 2003
Posts: 4,078
Not Ranked     
Default

Rod-I had that happen on the road one day and the pedal just went limp to the floor, got no gears. Pulled over, hood up and let it cool 20 minutes. All normal after and I rushed home.
Bled fluid, and installed Firesleeve over the line. Notoriously close to header on an ERA-dunno where on yours.
Firesleeve is good....also use a 550 + fluid.
__________________
Chas.
Reply With Quote
  #3 (permalink)  
Old 06-17-2014, 11:48 AM
Rick Parker's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: May 2001
Location: California, Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
Not Ranked     
Default

Rodney: Your concerns may be justified. Replace the hose with a Teflon lined steel braid type -3 or -4 brake hose (I have -3 in OEM Shelby application). If you feel its necessary cover it with a heat sleeve. It will not degrade.
__________________
Rick

As you slide down the Banister of Life, may the splinters never be pointing the wrong way
Reply With Quote
  #4 (permalink)  
Old 06-17-2014, 12:07 PM
scootter's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Sep 2003
Location: San Jose, Ca
Cobra Make, Engine: SPF #1436 514
Posts: 1,488
Not Ranked     
Default

I covered the clutch line that runs along the frame with an aluminum heat shield that I made, and also changed the fluid to DOT 3&4 synthetic. It stays light colored now, when before it would be dark brown/black in no time.
Scott
Reply With Quote
  #5 (permalink)  
Old 06-17-2014, 12:20 PM
rodneym's Avatar
Full Blown Member
Visit my Photo Gallery
Premier Contributor
 
Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
Not Ranked     
Default

Thanks for the replies, friends.

Chas - DOT5? I suppose this would require a complete flush, and not just empty the reservoir and add?

Rick - That's what I'm afraid of - that the tint is degrading rubber, not necessarily 'burning' the fluid. Again,

Chas, Rick and scooter - I'm definately covering the clutch line. Also, I'll empty and replenish what's in the reservoir with DOT3 and just see what happens.

Hopefully those 2 quick fixes will do the trick. If not, I'm taking everybody's advice, BUT...

The feel? Is the feel I described related to boiling? Adjustment, maybe?
__________________
rodneym
Reply With Quote
  #6 (permalink)  
Old 06-17-2014, 12:32 PM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,001
Not Ranked     
Default

Quote:
Originally Posted by rodneym View Post
Thanks for the replies, friends.

Chas - DOT5? I suppose this would require a complete flush, and not just empty the reservoir and add?
No. He meant really high temperature (+500) fluid, NOT DOT-5.
Reply With Quote
  #7 (permalink)  
Old 06-17-2014, 12:53 PM
rodneym's Avatar
Full Blown Member
Visit my Photo Gallery
Premier Contributor
 
Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
Not Ranked     
Default

AH. I didn't realize there was better stuff until I googled hi temp brake fluid.
Now my grocery list is complete.

But there's still the feel?! Related?
__________________
rodneym
Reply With Quote
  #8 (permalink)  
Old 06-17-2014, 01:01 PM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,001
Not Ranked     
Default

Quote:
Originally Posted by rodneym View Post

But there's still the feel?! Related?
You'll only know after you flush and fill with the new stuff. If you still have the same "rubby" feeling when it gets really hot, then the answer is "no."
Reply With Quote
  #9 (permalink)  
Old 06-17-2014, 03:26 PM
rodneym's Avatar
Full Blown Member
Visit my Photo Gallery
Premier Contributor
 
Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
Not Ranked     
Default

Was that a Zen Master type lesson?
Not quite as helpful as the 'Clean Your Air Bleeds - GGMS'.
__________________
rodneym
Reply With Quote
  #10 (permalink)  
Old 06-17-2014, 03:31 PM
patrickt's Avatar
Half-Ass Member
Visit my Photo Gallery

 
Join Date: Jun 2005
Cobra Make, Engine: ERA #732, 428FE (447 CID), TKO600, Solid Flat Tappet Cam, Tons of Aluminum
Posts: 22,001
Not Ranked     
Default

Quote:
Originally Posted by rodneym View Post
Was that a Zen Master type lesson?
Not quite as helpful as the 'Clean Your Air Bleeds - GGMS'.
Personally, I'm betting it's not just the fluid... but I won't come out and say that.
Reply With Quote
  #11 (permalink)  
Old 06-17-2014, 04:35 PM
rodneym's Avatar
Full Blown Member
Visit my Photo Gallery
Premier Contributor
 
Join Date: Sep 2008
Cobra Make, Engine: KMP 427 S/C, Twin Paxton 511 FE
Posts: 2,594
Not Ranked     
Default

I know, I know.
I was just hoping for another quick fix, and not another pilot bushing or something else.

Why only when hot?

BTW, yesterday I down shifted once and the tranny was still spinning/clutch dragging. Now that could be boiling/air in the line or a clutch adjustment, no?
Or am I being stubborn?
__________________
rodneym
Reply With Quote
  #12 (permalink)  
Old 06-17-2014, 04:48 PM
CC Member
Visit my Photo Gallery

 
Join Date: Oct 2003
Posts: 4,078
Not Ranked     
Default

For once Sheldon is right I meant 550-ATE Blue or Gold 200. Everybody's clutch junk is different- can't say for sure what your rub symptom means. Just make those changes and test again.
Two Paxtons should make things hot fast...
__________________
Chas.
Reply With Quote
  #13 (permalink)  
Old 06-17-2014, 10:41 PM
MaSnaka's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2006
Location: Thousand Oaks, CA
Cobra Make, Engine: Classic Roadster
Posts: 1,367
Not Ranked     
Default

You can split the heat sleeve down the length and wrap it over the hydraulic line and use lots of cable ties to secure it. Saves having to disconnect and re-bleed the line. I also put an aluminum sheet as a shield between the brake/clutch lines and headers. My symptoms of hot fluid were a mushy pedal if in stop and go traffic for any length of time.

John
Reply With Quote
  #14 (permalink)  
Old 06-18-2014, 02:21 AM
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2010
Cobra Make, Engine: SPF 2234 Diamond Edition, Roush 427R
Posts: 145
Not Ranked     
Default

Hi!
Had the same problems at my Superformance and decided to try it from cheap to more expensive - thought it was the fluid because the problems started only when the engine was hot.

1. check the clutch adjustment and change to a high boiling brake fluid like ATF super blue or Willwood or castrol SRF, bleed very carefully..when you are not sure..bleed once again (sleeve and master cylinder)
...if problem is not solved

2. Replacing Rubber Clutch lines with teflon ones and add heat shields to the lines where they are near to the headers
....if not solved...

3. pull the tranny and check your clutch

Of course in my case it was No. 3 ...a totally worn clutch...but had no slippery so i did not expected it.

Greetings from overseas
Peter
Reply With Quote
Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 12:07 AM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: CC Policy