[Shotimes] Intermittent clutch trouble

[David Carmean]

Hi,

I've had my 1990 SHO about 13 months now.  Within a month after 
I got it, I had to replace the throwout bearing, so while we were 
in there I had the following installed:  SHO-Shop 8-lb flywheel, 
IPT Stage-2 clutch kit, and ShoNut ceramic-upgraded throwout bearing 
(along with the ancilliary parts).  

Over the past few months, I've been having intermittent trouble with 
not being able to disengage the clutch completely.  Some days, with 
the pedal jammed to the floor with 100lbs of force, the clutch still 
drags and I can't get into gear at a stoplight.  And when I do, 
the car wants to creep.   Other days, it's fine.  "Fine" meaning 
that the release point is still down about two or three inches off 
of the floor, which is low compared to other SHOs, I gather?

Thursday, it was particularly bad, so I called up my mechanic 
(hi Nick! Don't know if you're on the big list or not) and drove 
over; he discovered that the automatic cable adjuster quadrant 
was not doing it's job for some reason.  He manually manipulated 
the pawl/quadrant and managed to get four clicks worth of tightening 
out of it.

That worked great.  For a day.  But by the end of my commute back 
home the next day, it was as bad as ever.  (My commute is about 
25 miles each way, often in stop-and-go traffic.)  But the 
freaky thing is that when I went out this morning to move it into the 
driveway to have another look, it was fine again!

I'm beginning to think it's somehow related to the length of driving 
time, and perhaps engine temperature?  I'm going to go back out and 
do some driving to test that, but I can't think what the mechanism would 
be that would cause that much of a change in the release point.

In fact, I was prepared to change my cable today, thinking that it must 
be in the process of breaking.  But how could it get *better* over 
night?  At no point did it feel like the adjuster quadrant had 
slipped....

Any  ideas?

Thanks.