I recall reading somes posts on this issue in the past but can't seem to find any so I don't think I am the only one with this issue.
Anyway, my break fluid reservoir has been leaking. I wipe off in between car washes and there is always fresh fluid on the outside that dirt is sticking too. I can't tell if it's overflowing or something is wrong with the reservior itself. The cap has been replaced once. Break Fluid is not being added during tune ups.
Recommendations?
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Slick
06 Tungsten Prem GT w/ 18" polished bullitts, Mud Flaps,
Hurst Short Shifter (rattles at 3000 rpm plus), JLT II CAI and SCT SCT Xcal-2 Evo tune, Borla Axle Backs, CDC sequential lights, Raptor shiftlite, Sirrus hardwired with PIE adaptor (and added extra RCA jacks in center console), Steeda Sport Springs, Tokico D-Specs
Dealer replaced my cap, they said the seal on the cap was probably bad and they had not heard of it from any other owners.
Normal problem to have with other stangers on the board. Have the cap relaced again, many seem defective.
Otherwise they must fix it if still under warranty.
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'06 GT---Mods---Tunable Inductions Intake, Fully Polished Pypes Violator Mufflers, MAG Mirror Inserts, Sequential Tail Lights, CDC Hood Struts, Powder Coated Valve Covers, Window Tints, Pioneer Premier DEH-P880PRS Head Unit, 8" Kicker Door Subs (SSMB8)
Front: Infinity mids/tweets 6812cf; Rear: Polk db570 mids/tweets------ Awaiting Install ---Eibach Pro Kit, DSpecs
I recall reading somes posts on this issue in the past but can't seem to find any so I don't think I am the only one with this issue.
Anyway, my break fluid reservoir has been leaking. I wipe off in between car washes and there is always fresh fluid on the outside that dirt is sticking too. I can't tell if it's overflowing or something is wrong with the reservior itself. The cap has been replaced once. Break Fluid is not being added during tune ups.
Recommendations?
There is a small slit in the top of the rubber gasket and the fluid is likely coming up through that slit, over and around the gasket.
Mine had too much fluid and I removed ~4oz to bring in down to normal levels and no noticable overflow since.
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05 Windveil Blue GT Conv, LT Grey Int, 5 speed, IUP, Shaker 500, JBA Axle Backs, Sequential Taillights, SS Inserts Stainless Bezels, Shelby GT500 18x9.5 Chrome Rims with P-Zero Nero M+S 255/45-18 (front) and P-Zero Nero M+S 285/40-18 (rear).
Mine leaked too. I had the cap replaced and it too is now leaking. I will get them to replace it again.
I had an 2004 Ranger and 2003 Mach 1 and they both leaked and the dealer replace both of them under warrenty and the problem was fixed on both cars.
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2006 Mustang GT Deluxe 5 speed Vista Blue with 12" white stripes, IUP, Evolution Performance 93 Tune, Hurst Shifter, Flowmaster American Thunder Axle-Back Exhaust, Sequential Turn Signals, CDC Front Chin Spoiler, CDC Shaker Ram Air
No fix, but someone mentioned that because of the leak, the paint under the master cylinder body was starting to peel. Mine was leaking when new,but not since dealer removed some fluid.
Does anyone have details as to the gasket they made. Pics, directions, etc. I am having this problem as well.
Thanks
BC
Go to the auto parts store and but a sheet of rubber gasket material, as thick as they have. Then cut out a circle that fits into the cap. You're done.
Well you do have to screw the cap back on.
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2005 Mustang GT with 04 Cobra iron block, 300 ci, Kenne Bell 2.6l twin screw, P&P S3 Heads, SS valves, Comp S3 cams, Currie 9+ 9" rear end and DS (coming soon), Hurst shifter, BMR K-member, A-arms, LCAs & UCA, JBA long tubes & mid-pipe, Accel COPs, GT500 fuel pumps, much more... 659 RWHP, 598 Tq @ 12 psi & 5800 RPM
why do we have to fix it??...these are not 68's we're talking about..bring it back to your dealer..i'm sure there are tsb's on this problem... if so many of you guys have the same..MAKE THEM FIX IT!
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06 GT PREMIUM Manual, 18's, flowmasters, Hurst billet, Webelectric sequentials, painted 10" stripes, Cervini KR500 hood w/functional ram air kit, K&N air filter, Cervini rear ducktail, quarter panel scoops, and quarter window scoops, Midweat Auto Gear strut tower covers, 1/2 mirror covers, and fuel rail covers. Pioneer touch screeen head unit w/blue tooth, dvd & sirius.Also haves: 1969 Lemans & 1968 Firebird.
Mine leaks too on the 06. I think the gasket is leaking as there shouldent be fluid between the cap and the bladder. I bought a new cap, it is going on tommorow.
I also lowered the level by a bit and it helped. But it sloshed around and leaked a bit after a couple weeks.
If fluid is getting out, dirt and moisture can get in. And it is supposed to be a sealed system.
Mine leaks too on the 06. I think the gasket is leaking as there shouldent be fluid between the cap and the bladder. I bought a new cap, it is going on tommorow.
I also lowered the level by a bit and it helped. But it sloshed around and leaked a bit after a couple weeks.
If fluid is getting out, dirt and moisture can get in. And it is supposed to be a sealed system.
Thats true, if fluid is getting out "moisture" is getting in which is very bad for brake fluid, brake fluid absorbs moisture very fast. and is why you see your fluid get dark, thats corrosion in all your brake components and why master cyl's and calipers go bad. So if you have an 05-06 with dark brake fluid, get it flushed.
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Ordered 7-2-05, T82 GT Coupe Prem, Screaming Yellow, Leather Trim Dark Charcoal, Manual Trans, Active anti-theft, Interior upgrade package. So far VOC, DORA, Clean and Unscheduled.
Cancelled when I found the Exact same vehicle with late availabilty 18" Crager style wheels 64Ws at Five Star Ford, Bought it
Brake reservoir leaks. Fix? 
Hey FORD, why is this such a problem???? It's not just Mustangs, Fords in general are known for their leaking brake reserviors. 
