drive it. Basically the piston goes in and out. Doesn't matter if you're squealing around corners on an autocross track or drag racing. Slaves usually fail when they rust through due hydroscopic brake fluid and age.However if the clutch fork is not installed properly or has bent, etc. it could be applying too much pressure to the slave piston pushing it too far which is causing it to blow. There are plenty of long time hard core racers on this site who don't go through slave cylinders, because hard driving doesn't accelerate their wear. So you probably won't get much feedback on whether the pathfinder slave is compatible as the OEM one has always been fine. You can mask the problem if you want by installing a different type of slave, but wearing out a slave in 1,500 miles is not normal, so you will probably end up with the problem again sooner rather than later. Good luck.
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