clutch problem (i think) really weird

[Undsptddsm]

well guys, once again i am in some real deep trouble with my 2g gst and need some help.....sat night while cruising i got deep in the gas and notice that my clutch got really really hard.....i did it again and it happend again.....i then thought it could be cuz of a hot clutch.....so i tried it this morning and once again...i go deep in throttle and my clutch gets really hard to push on to change gears....someone please help....


Symptoms:

i go deep in throttle and clutch becomes really hard to push on....kinda feels like something is pushing against me when it comes time to shift.....


only happens in heavy throttle....doesn't happen in cruise


p.s i have never changed the clutch so it is a possibility that its still stock...

[gsxboostin]

I would say that you clutch slave cylinder is bad. check that out and let the forum know.
-Matt

[Undsptddsm]

I would say that you clutch slave cylinder is bad. check that out and let the forum know.
-Matt

ok, will do.....whats the best way to check it???

[greenstreak]

Does the car still change gears without grinding or it is tough to push in the clutch and you are having disengagement issues?

[Undsptddsm]

Does the car still change gears without grinding or it is tough to push in the clutch and you are having disengagement issues?


while i'm cruising it goes into every gear no problems at all...once i go deep throttle, i can feel the clutch being pushed out (towards me) and it becomes really really stiff and hard, kinda feels like something is pushing against me... once i let off the gas and i change gears the clutch stays stiff, but it goes into the next gear without any type of grind or anything...

[Undsptddsm]

well guys, i just came back from working on the car.......so i go ahead and bleed the system.....fluid came with no problem no signs of air.....but bled it about 4-5 times just to be sure.....i also tried adjusting the clutch pedal....HERE'S WHERE THINGS GET WEIRD..... i go out after doing all that (keep in mind this is at 23 or so lbs of boost) and my pedal still got hard during heavy boost/heavy throttle.....now heres the mind blowing thing, i turn the boost down to 15lbs and the clutch gets so much softer.... the clutch feels like is suppose to.....i turned it to 18lbs, and it got harder....not as hard as when on 23lbs, but a lil stiffer......i'm stumped...

[91TalonTSi]

Damn, that is kinda weird. Sounds like you may have some sort of pressure plate problem. Either from the tourqe or heat that the extra power makes. I would lean toward the torque idea moreso. possible problem may be that its some how twisting the pressure plate out of round or something to that effect. ??
Boost and or anything else, has anything to do with the hyduralic system of the clutch.

[Undsptddsm]

Damn, that is kinda weird. Sounds like you may have some sort of pressure plate problem. Either from the tourqe or heat that the extra power makes. I would lean toward the torque idea moreso. possible problem may be that its some how twisting the pressure plate out of round or something to that effect. ??
Boost and or anything else, has anything to do with the hyduralic system of the clutch.


thats what makes it so weird.....i dont see and possible way why, i got deep throttle/higher boost levels affecting my clutch :confused: i was thinking about the pressure plate maybe being the cause, or maybe its one of the cheap crappy clutches that might be in there from whoever had the car before me....i dont know, i'm really stumped

[Undsptddsm]

i called shep from shepard racing today and asked him for his thought....he told me to check the cylinder over by the tranny (where you bleed the system) by pushing the rod back into the cylinder by hand, and if the rod goes in smoothly then the cylinders are fine....he went on to explain to me about how the cylinders might have to much pressure on heavy load and heat up the fluid (or something to that affect), just wondering if anyone else has tried this method??

[91TalonTSi]

I suppose its possible, I just dont see how. Ofcourse im not shep and I dont know as much as he does, so I would try it and go from there.

[Super4x4Duty]

Right off the bat you can try to break it down into a hydraulic or mechanical problem. Was the fluid discolored, show signs of overheating or was it very clean and clear? After driving the car is the fluid really, really hot? If the fluid looks great, are you sure the problem is relative to the boost levels or is it just RPM related because you rev your car higher with higher boost levels? If you roll into the throttle and rev the engine to your shiftpoint does the pedal get hard to push when you upshift? I've seen other makes of cars have problems shifting at high RPMs when pressure plates had weighted diaphram fingers and that may be one of the possible reasons in this case. At high RPMs the weights pull the fingers out to raise the clamping force of the pressure plate. Interesting problem, let us know what you find.

[Undsptddsm]

Right off the bat you can try to break it down into a hydraulic or mechanical problem. Was the fluid discolored, show signs of overheating or was it very clean and clear? After driving the car is the fluid really, really hot? If the fluid looks great, are you sure the problem is relative to the boost levels or is it just RPM related because you rev your car higher with higher boost levels? If you roll into the throttle and rev the engine to your shiftpoint does the pedal get hard to push when you upshift? I've seen other makes of cars have problems shifting at high RPMs when pressure plates had weighted diaphram fingers and that may be one of the possible reasons in this case. At high RPMs the weights pull the fingers out to raise the clamping force of the pressure plate. Interesting problem, let us know what you find.

just reviving this thread

thanks for the 411....as far as the liquid, it does look a lil dark....definetly not clear, i went under and did as i was suggested by shep, and tried pushing the rod back into the cylinder....and was able to with ease.....after speaking with shep (really cool guy), we kinda measured out the hydraulic system....although as u mentiond seemed to be a lil dirty.....so now i'm pointing the finger at a bad pp....it has the same symptoms 4x4 .mentioned....so that is going to be my next mission, have to finish moving first.... but will let you guys know as soon as i can, thanks for the help guys. :D :D

[91TalonTSi]

Great, Let us know. :)

[Undsptddsm]

talking of which.....what do you guys recommend....the act 2600, or the sbr 3500......i know theres reveiw and posts about the 2....but thought i'd ask since were on the topic.....which do you guys like better???why??

[0lmytsi]

ACT is proven.

[Undsptddsm]

just thought i'd revive this thread.....i still haven't gotten around to changing the clutch as i'm in the process of moving from my apartment to my new house.....so all my money went there, plus i haven't really had the time to change the cluthc....once i get into my garage and swap it i'll let you guys know how it turns out....thanks for all the help

[Super4x4Duty]

talking of which.....what do you guys recommend....the act 2600, or the sbr 3500......i know theres reveiw and posts about the 2....but thought i'd ask since were on the topic.....which do you guys like better???why??

Depends on what kinda bolt-ons you have. If you're thinking you have a stockish clutch and it's holding and you're not expecting to have a bunch of upgrades soon, I'd say stick with the ACT 2100. It has less pedal pressure, requires less hydrualic pressure (your master and slave will live longer) and will have all the clamping force you will need for a mild combination. Now if you're expecting a front mount, injectors, turbo, etc., in the future, go for the ACT 2600. JMHO.

[Undsptddsm]

sorry for the long delay...well since then i have gotten the car to run smoothly, without any sort of problem....so since then i endedup speaking with a few people and everyone had different opinions....i went through the entire hydraulic system without finding defects, i endedup with the SBR3500 and after about a week or 2, the car was running...we had a big war between us and the car...very big....but finally got it up, had a little problem with no gears but got that worked out....and now the car is running like a champ....so for any of you the experience this problem where the pedal gets hard when deep in the gas/or heavy boost....i'm pretty sure the pp, clutch, tob is the way to try.... thanks for all the help ...