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.
__________________ I'm a pretty straightforward guy as long as I'm not BS'n ya
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 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