[stp1971]

Maybe the linkage is out of adjustment,, or if it is Hydaulic check the lines and amke sure they are not kinked. If there is any blockage or kinks it could be holding pressure at the clutches and causing it not to relaese the pressure by bleeding back up into the reservoir,, look at the sight glass and see if it might have an air pocket in it,, that would be an indicator that it is low on fluid meaning that pressure might be still applied.

I had a truck that kept wearing the left side pads down twice as fast as the other side. My immediate reaction was that the caliper was sticking,, so I greased everything and put it back together. Still kept doing it,, so the next thing I thought was that the piston in the caliper was sticking,, so I replaced the whole caliper,, still did it,,errrrrr.....

Next thing I thought that the proportioning valve's metering valve was bad,, replaced that,, still doing it. Then I replace the rubber line,, still did it. Finally I noticed an ever so slight bend in the metal line from where it looked like something might have hit it,, replaced that part of the line,, problem fixed..... Luckily it was a company truck and not even my boss could figure it out,, he suggested some of the same things as well so I didn't feel so bad.

So point is,, check the lines to make sure no kinks or bad hoses if hydraulic.