ok so i have this 88 GXL n/a, 5 lug, 5 speed, 85k original miles. ever since i bought the car i was having this problem. the clutch would grab and engage fine within the first say 45 minutes of driving the car, then after it started to get pretty warm when it was engaging i would get this hardcore chatter, so i thought it was the flywheel warped a little or something clutch related. this weekend i went ahead and put a racing beat aluminum flywheel in with a 4 puck racing beat clutch with a factory pressure plate (for streetability) drove it to work a couple of times and it worked great (10min commute) then last night me and a bunch of friends went up to kent to spectate at the races, and sure enough it started to do the same horrible chatter. when i was in there i also did the pilot bearing and throw out bearing too. but now i am just dumb founded. i made sure not to get any grease on any of the mating surfaces and sprayed them down with brake cleaner to make sure. i put new polyurethane tranny mounts in too, so where i am at now is just dumb founded. it works great until it gets real warm (30-45min) could it be the slave or clutch master? anyone experience this problem too? HELP!!! oh and i also put dot5 fluid in and blead the system.

Check your motor mounts. A torque brace for the motor solved my problem. I got mine from racing beat.

Dave

I'll check the motor mounts tomorrow, but i would think if it was the motor mounts i would have the problem all the time not after 45min.

motor mounts are fine... any other thought? i read that if your front U-joint is going out you get a shutter when starting out... any thoughts though?

Might be slave cylinder is weak. I assume you replaced the pressure plate? All rubber in drive line is solid. Heat sounds like the main issue, how does the pedal feel when this happens?

its at the top... its pretty high always though....

I have the same problem. Once it start shaking its pretty scary. Feels like its rattling apart! I figured I needed a torque brace as well but looks like I have to change my slave and master anyway. My Clutch engages really low to the floor so I'll do it all in one shot.

Are you using any fluid at all in the system? Pull back the dust boots to see if either cylinder is wet.

im not using any fluid.

in an unrelated note about your choice of using DOT5.



You're going to have a problem down the road, DOT5 is not compatible with ANY other fluids. unless you replaced the master, slave and clutch lines there will be a mix of DOT"whatever you had before" and DOT5, which is not good.



as for the chatter issue. If it was your ujoints it wouldnt feel like chatter, it would be a loud knock, also on these cars if the ujoints go, generally the rear one will go, plus youd be able to feel it without having to shift.



I'd consider new engine mounts as a possibility especially since it seems to be connected to heat.



kevin.