Dirty and old clutch fluid can cause your clutch to slip, but it also depends on how many miles you have on it. How many miles are on the clutch? While your bleeding the clutch do your brakes as well, it's a simple process. I'm sure you can find a diy on this forum if not I'll post up the steps.kaedachef wrote:Hey guys, my clutch in my s13 just started slipping yesterday and my clutch fluid is black, could this be the problem, and how would I bleed the system completely.