Jim wrote:
> Please excuse the length of this topic. I am totally stumped and have
> tried just about everything I can think of to solve my problem (hence
> the length). I have a 93 Corvette with the ZF-6 manual transmission.
> The car is totally stock with 50K miles. I've owned it for 18 months.
> Right after I purchased the car I noticed the clutch pedal was
> difficult to depress and it didn't shift well. Two shops said I needed
> a new pressure plate. Last summer I changed the pressure plate, disk,
> throwout bearing and pilot bushing. It approved the shifting. However
> as I drive the car the clutch pedal stiffens up and the car does not
> shift as well. I've changed every possible part I can imagine. Here
> is a list:
>
> Clutch master (twice)
> Clutch slave (three times - did run into a manufactures defeat on two
> of the units)
> Braided clutch line
> Clutch pedal pivot bushings
> Throwout fork
> Pivot ball
> Pressure plate (twice)
> Clutch disk (twice)
> Throwout bearing (twice)
> Pilot bearing
>
> The throwout bearing guide tube is in great shape with no ridge or
> scuffing. I've literally been battling this problem for 18 months. I
> am totally stumped. Has anyone ever come across this scenario or does
> anyone have any advice?
>
> Thanks in advance for your help.
>
> Jim
>
Try bleeding the system, with the car cold. Then wrap the line with
header wrap. You may be boiling the fluid, causing bubbles,which don't
compress good, and the clutch doesn't depress fully. Also use the
highest temperature rated fluid you can get for that system.

--
Steve Walker
(remove wallet to reply)