Clutch sticks to the floor

[2012 Boss 302]

My '12 Boss has had this issue since probably the second time I got on it. At 3/4-WOT between 5k-7k rpm the clutch pedal will not return to the top. This results in missed shifts or over revving.

I thought I would try to start a clearing house area where we can post what fixed the problem if anything.

Please, if it's been fixed please tell us what fixed it....

 

[Laztug]

http://www.svtperformance.com/forums/2011-mustangs-354/710327-2011-5-0l-clutch-pedal-issue-fix.html

 

[2012 Boss 302]

Yeah I read that. Seems like the replies after the OP were a mixed review...

 

[01bluesnake]

This thread is kind of pointless as this has been discussed over and over and over.

Buy a braided clutch line / thread....



If you choose not to do that, shift lower than stock redline and don't raise the rev limiter over stock.



My '12 has done this a few times, but only if i shift to close to 7K

 

[2012 Boss 302]

This thread is kind of pointless as this has been discussed over and over and over.

I understand that. I have searched 4 different forums and have not found a definitive fix or a pattern fix.

 

[BPatterson]

Braided clutch line does not fix everyone's problems. There are those of us who have replaced everything, and it still happens.

 

[truebluedevil02]

start with the cheaper mods first and work your way up, that's the best advise I can give. Not one specific thing fixes these issues, it can be several things.

 

[cbaty08]

Braided clutch line does not fix everyone's problems. There are those of us who have replaced everything, and it still happens.

Agreed!!!!!!!!!!!

 

[seank]

Braided and DOT 4 not? Isn't the issue overheating the fluid? Just a line will not solve the issue of the hydraulic fluid having too low of a boiling temp.

 

[BPatterson]

The orifice in the stock line is too small, that's the reason for the line upgrade.

 

[r.barn]

There is a video on YouLube from one of the performance shops that shows what the problem is. The new 5.0 Mustangs got a different pedal spring return design that is flawed and can bind.

The fix is to replace the clutch pedal box and spring system with a GT-500 unit.

This
Clutch Pedal Spring Issue - YouTube

 

[96svtdriver]

My '12 Boss has had this issue since probably the second time I got on it. At 3/4-WOT between 5k-7k rpm the clutch pedal will not return to the top. This results in missed shifts or over revving.

I thought I would try to start a clearing house area where we can post what fixed the problem if anything.

Please, if it's been fixed please tell us what fixed it....

I ended up doing the Barton Shifter bracket, DOT4 fluid, Redline MTL and GT500 pedals recently. Huge difference now. The slop is out of the shifter, the pedal feels firmer and the DOT4's higher boiling points make it much more manageable. I was thinking of adding the Boss' transmission cooler too at a later date, but I don't hard shift it much at high RPMs so possibly not.

 

[Davey]

There's no option in the poll for "I've never had that happen."

 

[rsnyder]

Maybe I missed reading this somewhere, but why wouldn't the dealer fix this under factory warranty???? I felt this in my car only once at high rpm when I was shifting between 2-3. The pedal felt dead, and took a few seconds to return up.

 

[twistedneck]

Yes, its a warranty fail. Yes i've had it happen too after a high rpm pull on rare occasions. I think its just the factory clutch not prepared for big rpm.. i like Valeo, i like the clutch feel and its pretty tough.

 

[ReefBlueCoupe]

There is a video on YouLube

Is that some new porno tube site?

 

[YLYCYOT]

A 2012 gt500 pedal assembly, jhr line and a Mcloed rxt clutch fixed my problem. Its like a totally different car and the pedal never sticks to the floor. Pedal feel is great without any spongyness. Its not a fun project but it was wll worth it.

 

[timpryor]

There's no option in the poll for "I've never had that happen."

Ditto

 

[2012 Boss 302]

There's no option in the poll for "I've never had that happen."

^^^^ funny....

I looked at my clutch pedal assembly. I have two horizontal springs next to each other, and a third vertical spring next to the clutch pedal.

I took the vertical spring off leaving just the two horizontal springs. Looking at the GT500 clutch pedal it now looks identical.

So far three 7000+rpm blast have been event free. One pull was from a stop in 1st to 7K and 2nd to 7.5K. :thumbsup:

I am going to replace the clutch line with JHR's high flow piece.

Question, for those who have replaced the clutch line, how did you bleed it ???? op:

 

[BPatterson]

Take the top off your master cylinder, and pump the clutch pedal about 100 times.