Originally Posted by nuclearlemon
most likely aisan cores that have been rebuilt with whatever parts the rebuilder used, not aisan internals.
Good point, if it's rebuilt who knows what the guts are like, maybe cheap, wrong sized Chinese seals. FWIW, I've had good luck getting new Aisin parts through Amazon. I bought a brake master that I still need to put on, Aisin blue box, brand new that was 1/2 what Toyota wanted for same part in a red box.
I think this is the right slave for Rick's truck:
Aisin CRT014 - $26