Calgary Jeep Association

Author Topic: brake issue  (Read 951 times)

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Offline JackstandJohnny

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brake issue
« on: September 03, 2013, 01:06:57 PM »
noticed this on the weekend.
brakes don't feel right.  initial pump of the brakes it feels ok but then the pedal slowly starts going to the floor. so if i come to a stop at the light the jeep stops but then it will start to creep forward (as there is no brake pressure)
i first noticed it on a hill this weekend when i was on the brakes, cause instead of stopping it crept forward (and into a tree) by the end of the weekend i was pretty much pressing pedal to the floor just to stop on downhill parts.  road its not as bad but again, at a stop light the pedal goes down and jeep creeps forward.
fluid levels are perfectly high, and theres no visible leaking at calipers.

master cylinder crap the bed?

edit: upon further investigation i can see some weepage from teh master on the brake proportioning valve and the booster.  new master cylinder is on the way
« Last Edit: September 04, 2013, 09:28:22 AM by JackstandJohnny »
~ rescue green JKUR on 35s.  typical rubicon build

Offline TL-Iguana

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Re: brake issue
« Reply #1 on: September 07, 2013, 03:54:08 AM »
pull the vacuum line off your booster and clamp it off. Try that. Will revert to manual brakes but you will then rule out the booster. Ive had 2 go in the past...
I did a Google search for "hot trannies" but nothing came up about oil coolers  :o

Worrying too much about mpg with a Jeep is similar to worrying about your sister's virginity. An ok thing to be concerned about but...

'01 XJ on 35s, '11 Jk DD