Brakes Problem

[garett]

i've never had that problem. but i'm dealing with 2 inch lift most of the time. it ain't right. what size tyres are you running?. will it happen from cold stationary ? the fluid level stays the same... which rating fluid.
don't think it would be air unless there is lots of air. my wag has a load valve for the rear. (it's a gq) by all means try bleeding it. (i upgraded the rear from drums to disc didn't have any issues bleeding it)(but then again i did the slave on my clutch and never had issues bleeding it)

[mudski]

Bloody hell, that's not too brilliant.

The other week I was travelling home, a guy towing a Dunny door on a trailer got into trouble coming down hill (this is 100kmh both ways, country road), I was going up hill. He fishtailed until the trailer began to steer the car, he crossed both sides of the road and a bit more, I planted my foot on the brakes and the damn pedal just kept going to the floor and I was getting closer and closer to this guy.

Anyway, I'm still here.

Jesus! Well maybe mines not as bad as yours as my Patrol stops really well, in the dry. But if I am sitting at the lights and push hard on the pedal it does slowly sink in. I can't say I have experienced it whilst on the move. Rubber brake lines are known to expand when old, yours should be ok still. But having said that, braided lines are worth every penny in my opinion. Im not sure if a vacuum leak would exasperate the issue or not.

[10G]

Im not sure if a vacuum leak would exasperate the issue or not.

Funny you should mention that. When @bigguwesty was helping me with the Dawse install, he wondered if I may have a vacuum leak at one stage.

How do you look for a vacuum leak?

[BigRAWesty]

A vacuum leak makes the pedals feel heavy, it won't make it bypass.
Id be maybe looking at the abs unit.
Pretty sure they have a bleed off so the can take full control of each wheel / axle.
But they can only supply the pressure recived by the master..

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[JME_GU]

Bleed / test the LPV. Every mechanic (even brake specialists) miss that.

What's an LPV?

[Touses]

What's an LPV?

Load Proportioning Valve. It regulates the amount of "braking" in the rear of the vehicle, depending on load.

[BigRAWesty]

Yes wagons have the LPV unless you have a later model with all 4 wheels seperate threw abs system.

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[Turtle_au]

Load Proportioning Valve. It regulates the amount of "braking" in the rear of the vehicle, depending on load.

It has a lever arm that changes the rear brake pressure depending on the height of the rear suspension. That should be adjusted when a suspension lift is done, otherwise it will always think there is no weight on the rear and your rear brakes will be doing nothing.

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[10G]

Yes wagons have the LPV unless you have a later model with all 4 wheels seperate threw abs system.

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When I replaced my brake hoses post lift, I had to get 4 due to ABS. What's your brake pedal like Kallen??

[BigRAWesty]

When I replaced my brake hoses post lift, I had to get 4 due to ABS. What's your brake pedal like Kallen??

Mine is good. Have no faults with it.
My rear axle is off one line still threw a LPV, only front axle is split.

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