this is a slave cylinder story , not a master cyl one
but anyway
back in the Old Days, I had to hone out my FJ40 clutch slavecylinder every couple years or so because water would get in behind the piston, causing rust and leaks
THen I got the idea to try something: After honing and peening the cylinder bore once again, and putting everything back together, I put grease behind the piston to coat the cylinder walls and keep water away from them.
That was in 1988, and I have had no more problems with the clutch on the FJ 40.
Now when I got the FJC, there was some chatter in the clutch slave piston so I got some moly disuflide lithium graphite grease, and, using a hypo, gave a few squirts behind the clutch slave piston, right through the boot. No problems since
I think this was the same problem area of mine. It was the cylender at the foot pedal, it just kept getting louder and louder t othe point of completely annoying, they took it apart supposedly and changed some seals then also mentioned some white grease of some sort. I'm just happy it's gone. I hate rattles and squeaks, just bug the crap out of me. lol I'm gonna be nuts in a few years I'm sure.
My 05' Taco has the same issue. They'll lube it up at the dealer and it comes back eventually. Fj is doing it yet.......
__________________ 2007 Titanium Metallic and YES I wheel it! TLCA#16880, Gotham City Land Cruisers, Northeast Crew
6 SPEED MANUAL Donahoe suspension lift with UCA"s, Body Mount Mod/ K&N Drop in, Real Wheels Lightbar w/4 PIAA 520SMR XT Lights, AllPro Front and Rear Bumpers w/Warn M8000 winch, AllPro HD Front Sway links, AllPro Trailing Arm skids, All Pro sliders, TRD CAI
Weld Dune 6 Pro Loc, Toyo MT's 35x12.5x17
RASTA Aluminum Skids Daily Driver:2005 Toyota Tacoma C cab