strange clutch behavior

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englertracing
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strange clutch behavior

Postby englertracing » Tue Dec 20, 2016 12:44 am

I cant think of any logical reason for this to happen

2.3L ford ranger, hydraulic clutch the kind that goes around the input shaft a "doughnut cylinder"
the old truck, a 95 shares its Brake MC reservor with the clutch master
the new(er) truck 97 has its own clutch MC reservor

the old truck
when you would really really ring it out to like 6000
ocasionally, you could feel the clutch pedal rise up from its normal position which was odd
it did this before and after i replaced the clutch (wore the old one out) and replaced the slave cylinder and bleed the hell out of it
it did it before the first clutch went bad (the truck had 180k on it when i did the clutch)
and it did it after (i put another 100k on it)
it would not slip the clutch when the pedal was doing its thing

the newer truck is worse
the clutch pedal goes from its normal position then rises, and the clutch slips sometimes,
thing is it only does this at real high rpm
while
full torque rpm is just fine
climbing a hill at max torque rpm just fine
loaded down with people and motorcycles, just fine

side step the clutch on a downshift, the clutch has a pumped plump up feel and clutch slips like a :-#
and the only time it stops is after you step on it a few times and then it looses its pumped up feel

I figured out it may have air, ive bled some pretty tricky systems of different types,
i ran a half a can of brake fluid through it till it was clean bleeding it,
still does it

i'm posting because i've got no logical explanation on how the pedal can push back on me from its standard position
its easy to say its air, but maybe its some type of trick i don't know about a cheap diaphragm clutch

autogear
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Re: strange clutch behavior

Postby autogear » Fri Dec 23, 2016 12:37 pm

Im assuming the brake pedal doesn't have the same behavior?

englertracing
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Re: strange clutch behavior

Postby englertracing » Fri Dec 23, 2016 4:51 pm

autogear wrote:Im assuming the brake pedal doesn't have the same behavior?


No brakes are just fine.
The brakes are vacuum booster assisted
The clutch is not.
And has its own reservoir on the 97


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