Is there such a thing? I have little knowledge when it comes to transmissions and associated things, but heres the deal....

a couple of friends and I were out at an old abandoned air-field and played around for a few minutes doing some runs from a dig...

I launch fine, but when I go to shift it grinds like crazy and wont let me in until the RPM's come down some. Buddy of mine (who is pretty knowledgable about cars) mentions this "high-speed shift lock-out" that will not allow you to shift until the RPM's come down some. I have no idea. My clutch is great, ACT HDSS thats been in since about just after New Years. This is the first time I have launched my car since I bought it a year ago. It was pretty disappointing, as I smoked a Z06 and an M3 off the line, but that was it. Especially since I slaughter my buddy in his M3 everytime we mess around, its just always from a roll..
I know how to drive (I know someone on here will say something like that...) but am clueless as to what the problem could have been...

Any thoughts or ideas or anything at all?

I apologize if this sounds like some sort of NEWB question....

 

It's lockout search around for ACT and adjust your clutch.

 

Ive been searching for a while now, but I am continuing to do so, thanks for the post though...

 

All I had to do is read you had a ACT clutch.

Those clutches need to have the clutch pedal adjusted. Fixes the high RPM lockout many times. I think it is something you should do regardless of the clutch brand. Some solid shifter cable linkage bushings might not hurt either. https://www.evolutionm.net/forums/sh...dal+adjustment

So how do you shift exactly? Clutch in completely, try to move shifter and then grind? Or does your hand move slightly faster than your foot or vice versa? I've had my share of missed gears from 1-2 shifts because I kept putting it in gear before my foot was ready. Then again, you might be shifting perfect and just have a clutch issue. Did you remove your restrictor pill from the clutch slave cylinder?

 

like above mentioned. i had same exact problem. all i did was adjust pedal out. fixed.

 

Ok first thing here, I did search and found some threads (recent ones) discussing this same thing. I am getting the information about it from there and thats cool, but I want to understand the problem, not just fix it or whatever...thats why I am starting this thread, and I appreciate your guys' help.

I never adhusted the clutch pedal aftger installing because I thought it felt fine, i like the way it is, but there is obviously more to it that just feel, am I right? what exactly is adjusting the clutch pedal going to do?
Burklow-to answer your question, I have put the pedal on the floor when I am shifting, always have. I know what you mean though about have a "hand thats quicker than your foot" and stuff, because I have done that as I am sure every member on here has, but I am confident that it is not me, but the clutch or something associated.
Ok, so I am going to adjust my pedal this afternoon after work. I know how to do it, but what am I looking to achieve here? I am thinking this is a "drive adjust, drive, adjust" thing till its right?

Thanks again gents for the help, I appreciate it.

 

It isn't a problem to help. Adjusting the pedal is just going to change a little bit where the clutch is actually engaging and disengaging. I've heard Exedy twins don't need this step and I believe this is because that clutch mates so well with the flywheel and tranny. The stock clutch is actually an Exedy believe it or not. Same brands, perhaps why no adjustment? Now as for exactly why the ACT needs an adjustment, I don't know. You might want to ask a tranny expert. But you're not the only one experiencing that issue with these clutches. Don't get be wrong, I love 'em. They're inexpensive, grippy, and durable but they do require a bit of work for smooth operation. I sometimes see guys DD cars with 4 puck clutches or something. That isn't an easy task, so it proves with enough adjustment, any clutch is do-able. The pedal adjustment won't move it that much really. Think of it as normal new clutch maintance like resurfacing a flywheel.

Be glad we know that the problem is fixable. If you had this problem with a stock clutch, I'd be worried.

 

my act hd with street disk did the same thing, I adjusted it which helped a little. Shifting into 4th or 5th at high rpm still sucked though. Well I took the tranny and clutch out, tranny was fine, and what I found with the clutch was disturbing... The outer edge of the clutch disk hub and the hub springs had been slightly rubbing on the pressure plate when the clutch would try to release...
no more act for me!

 

Glad i joined this site, becuase I thought it was only me experiencing this.

 

+1 on that, i have learned everything I know from this site and its members, there is alot of helpful people on here....

 

this would explain my problems also...i need to do this adjustment

 

I had the same problem and I adjusted my clutch pedal and everything was fine.

 

wow, im surprised its that common, and that its that simple of a fix

 

Does this apply to the stock clutch?

 

^ JKD,

apparently not. why? r u experiencing similar problems?