[sdspeed]

Hi,
Ok I'm baffled. Clutch pedal will go all the way down to the floor after depressing it only about half way. The pedal will just smoothly drop to the floor so tight I can't even get a toe under it. master and slave were both replace appox. 10k miles ago. Acts like there is a vacuum in the hydraulics or at 165k miles the pressure plate is shot,

Shifts fine but will scare the tar out of ya when the pedal doesn't return.
Pedal bracket ass'y and return spring are new, only 10k miles ago too.

Any ideas?

THX

 

[BamZipPow]

Hmm...if the pressure plate was bad, wouldn't you be slipping, too?

Any leaks? How's that hose looking? Did you bleed it correctly? Post up some piccies of yer clutch pedal assembly as well as the engine and transmission areas.

 

[sdspeed]

Thats the strange thing, No clutch sllippage, no odd smells, all componets and lines are dry and up until just recently all was good. It's a crazy thing to watch, With the truck turned off you can depress the clutch pedal eith by hand or foot down where it is just past the free play and then let go and it will then just pull away from your hand and smoothly go all theway to the floor. like the invisible Man is in the seat depressing the pedal for ya.

I can take some pic's, what are we looking for?

 

[BamZipPow]

Not exactly sure just yet.

Have you tried bleeding the clutch again to be on the safe side? I'm still gonna lean towards the master cylinder being bad even though it's fairly new.

 

[sdspeed]

Not exactly sure just yet.

Have you tried bleeding the clutch again to be on the safe side? I'm still gonna lean towards the master cylinder being bad even though it's fairly new.

Well just got back from bleeding the system! I'm now leaning towards a collapsed pressure plate. After bleeding the system I then had NO clutch resistance at all, you could pump the pedal by Hand with no effortt at all, kinda like when a line is open (not that you would be pumping it of course) but you get the idea.
tried adjusting the rod going into the Master in both directions with no real change, minor improvement with the rod a little longer but even then you depress the pedal , Oh half way and remove your foot and it still sucks the pedal to the floor!

 

[BamZipPow]

Have someone help you by pressing the pedal. You'll have to crawl under the truck and see if the clutch fork moves with the slave unit.

 

[sdspeed]

fixed

Well I replaced both the Clutch master and slave cylinders, and checked all the other componets. Truck runs and shifts fine. Best I can conclude is that the pedal spring after it goes over center it becomes an assiting spring instead of just being a pedal return spring. So when the cylinders get weak or corrode internally there is enough force to colapse the master cyclinder .

Thx for the input everyone!:thumbsup:

 

[ChipNOreo]

My brother had a similar problem with his 4runner recently. His clutch pedal would randomly fall and have to be pulled up to shift so he replaced the master and slave cylinders. A few months later the clutch started acting up again.....

Glad you got it fixed!

 

[JK1940]

Well I replaced both the Clutch master and slave cylinders, and checked all the other componets. Truck runs and shifts fine. Best I can conclude is that the pedal spring after it goes over center it becomes an assiting spring instead of just being a pedal return spring. So when the cylinders get weak or corrode internally there is enough force to colapse the master cyclinder .

Thx for the input everyone!:thumbsup:

I belive your clutch assem. bracket is craked http://www.4x4wire.com/forums/showflat.php?Cat=&Number=231519&page=&view=&sb=5&o=&fpart=all&vc=1

this is your problem

joe
jk1940