black sut in clutch master cylinder

brianrbhutch · 12-18-2009, 04:53 PM

went to make a run and was checking fluids and noticed clutch was a little low, proceeded to add a little fluid and there was a blackish dark gray substance kind of swirled around in resivoir, i over filled to make it run out adjusted level and went on my way later on pushed clutch felt funny pressed again to the floor it went jumped out to see if fluid was gone, it was still full but almost black double clutched it home, figured needs new master and slave but would like ideas. what would cause the black sut

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myyota · 12-19-2009, 05:59 PM

It wouldn`t be a bad idea to replace both and flush the lines.

4Crawler · 12-19-2009, 06:02 PM

Could be the fluid just got old, it'll turn very dark with time and not flushing it. Or it could be a seal or flex line had started to disintegrate and it was than black rubber residue you saw.

stormin94 · 01-05-2010, 03:18 PM

What kind of fluid does it take? Is it just simply "clutch fluid"?

ToyoTech559 · 01-05-2010, 03:21 PM

brake fluid goes in clutch reservoir
DOT 3 should be fine

stormin94 · 01-05-2010, 03:22 PM

Quote:

Originally Posted by ToyoTech559

brake fluid goes in clutch reservoir
DOT 3 should be fine

Ok, cool. Thanks.

Kiroshu · 01-05-2010, 03:24 PM

A flush is not neccesary and brake fluid does not get "old" It either gets contaminated or dirty. Make sure your reservior is on all the way and make sure its not leaking anywhere. If it was low its prop leaking look at the rubber line down near the trans. Its it saturated? Thats prob the issue. Brake fluid always.

ToyoTech559 · 01-05-2010, 03:29 PM

Quote:

Originally Posted by Kiroshu

A flush is not neccesary and brake fluid does not get "old" It either gets contaminated or dirty. Make sure your reservior is on all the way and make sure its not leaking anywhere. If it was low its prop leaking look at the rubber line down near the trans. Its it saturated? Thats prob the issue. Brake fluid always.

in a sense it does get old, well kinda. even if it doesnt get dirty or contaminated by wear and tear. brake fluid absorbs moisture which is in the air around us. moisture will break down the fluid and its best to change it out every 2 years

stormin94 · 01-05-2010, 03:39 PM

I might have a leak somewhere, since there's some fluid near the top of the trans that's leaking from somewhere. And my clutch pedal was kind of stiff today. I'll have to check that out tomorrow, since it's getting dark out right now.

12-19-2009, 05:59 PM	#2 (permalink)
myyota Registered User Join Date: Oct 2006 Location: GrangeVille, Idaho Posts: 2,484	It wouldn`t be a bad idea to replace both and flush the lines. __________________ 86 Toyota 4Runner Solid Axle Swap, 16'' of lift, 37x12.50-15 GoodYear MTR tires, Trail Gear High Steer, 5 speed manual trans swap, InchWorm Duel Cases With 5.7 Gears, 63'' Chevy Springs In The Rear, 5'' Trail Gear Springs In Front, Marlin Crawler Third Members, 4.88 Gears With A Detroit In The Rear, High Pinion Front With 4.88 Gears And An ARB, Downey Header, AFM Upgrade, Optima Battery, Trail Gear Sliders, Addicted Offroad Front Bumper, Trail Gear Rear Bumper.

12-19-2009, 06:02 PM	#3 (permalink)
4Crawler Contributing Member Join Date: Jun 2002 Location: SF Bay Area, CA Posts: 8,750	Could be the fluid just got old, it'll turn very dark with time and not flushing it. Or it could be a seal or flex line had started to disintegrate and it was than black rubber residue you saw. __________________ 1985 Toyota 4Runner SR-5, 22REC engine, dual t-cases, 4.88 gears, dual ARBs, 33x10.50 BFGs or 35x12.50 MTRs r.c.brown@ieee.org TruckEditor@tlca.org Project: 4Crawler 4Crawler OffRoad Gettin'Off 4WD Club

01-05-2010, 03:18 PM	#4 (permalink)
stormin94 Contributing Member Join Date: Jun 2007 Location: Lake County, CA/Sacramento Posts: 4,202	What kind of fluid does it take? Is it just simply "clutch fluid"? __________________ 1994 Toyota 4Runner SR5 4X4 221,500 miles and counting 3.0 V6, 5 speed 10/15 MPG city/hwy(with 33's) Current Mods Headers, 2.5" Flowmaster custom exhaust, K&N FIPK KC Daylighters, electric fan Ranchos x4, 2" Lift Downey coils 33-12.50 M/T's, 1" t-bar lift, 1" body lift Tow pkg w/ lighthookups Silverstar Headlights, Pioneer Deck w/XM Brushguard 250Watt JLAudio 8" W3 Sub Future Mods 12V Aux outlet-400/800peak inverter roof basket/lights Air locker 4.88 gears H.O. Alternator

01-05-2010, 03:24 PM	#7 (permalink)
Kiroshu Registered User Join Date: Oct 2007 Location: wade, NC Posts: 1,820	A flush is not neccesary and brake fluid does not get "old" It either gets contaminated or dirty. Make sure your reservior is on all the way and make sure its not leaking anywhere. If it was low its prop leaking look at the rubber line down near the trans. Its it saturated? Thats prob the issue. Brake fluid always. __________________ "Why not stay OEM your truck will last longer?" "I love what you do for me Toyota." "Moving Forward." "If a yota can wiggle It ain't stuck." "No matter what you do that timing chain will beat the guidles(Dampers) 1v1." "(TTT) Toyota Tough Truck."

01-05-2010, 03:39 PM	#9 (permalink)
stormin94 Contributing Member Join Date: Jun 2007 Location: Lake County, CA/Sacramento Posts: 4,202	I might have a leak somewhere, since there's some fluid near the top of the trans that's leaking from somewhere. And my clutch pedal was kind of stiff today. I'll have to check that out tomorrow, since it's getting dark out right now. __________________ 1994 Toyota 4Runner SR5 4X4 221,500 miles and counting 3.0 V6, 5 speed 10/15 MPG city/hwy(with 33's) Current Mods Headers, 2.5" Flowmaster custom exhaust, K&N FIPK KC Daylighters, electric fan Ranchos x4, 2" Lift Downey coils 33-12.50 M/T's, 1" t-bar lift, 1" body lift Tow pkg w/ lighthookups Silverstar Headlights, Pioneer Deck w/XM Brushguard 250Watt JLAudio 8" W3 Sub Future Mods 12V Aux outlet-400/800peak inverter roof basket/lights Air locker 4.88 gears H.O. Alternator

01-05-2010, 03:21 PM	#5 (permalink)
ToyoTech559 Registered User Join Date: Dec 2009 Posts: 160	brake fluid goes in clutch reservoir DOT 3 should be fine

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