71 Datsun 521. short 5spd transmission. clutch slave cylinder is from a 78 620. stock clutch master.
everything was running and working fine until I pulled into a gas station, hit the cluth and had nothing. looked in the res, and it was empty. looked under and could see fresh clean fluid coming from the boot on the slave. all lines were dry.
I walked 3.3 miles, bought a new slave, and installed. went to bleed the system and about when I was done, while my helper was pumping the clutch, I heard and saw a pop. and fluid started leaking form the boot on the new one.
I am curious why I am having this issue and why now when its been running fine for months of daily driving.
my thought is this, the slave cylinder rod is adjustable and maybe vibrated to the point of trying to over engage when I put my foot on the clutch, which then bottoms out on the clutch and the slave still attempts to push more?
anything else I should be looking at? clutch functioned before without any issues.