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2

First, you need to change the brake fluid ASAP. This is an hygroscopic oil with an high boiling point. Even if you are not using the car, it slowly absorbs water and contaminants from small leaks and deterioration of the brake circuit. Water, having a low boiling point, will degrade the performance of the circuit up to making them very low. It is mandatory ...


-2

the only way to reverse while the car moves is if you change from d to n then r but do not accelerate or the car will use its momentum and transfer that physical energy directly to the engine which will cause the transmission parts to suffer greatly (specially the clutch, with standard Automatic transmissions, not CVT.)


4

There are two things I can think of which may be the problem. First - You could start by flushing the break lines with fresh brake fluid. Old fluid in the lines can contain water and air which would not be good and give you the squishy feeling. Getting rid of the old fluid would probably help the pedal feel tremendously. Ensure you are bleeding the brake ...


1

That'd be the handbrake (also known as parking brake or emergency brake), in lieu of a traditional cable-operated brake - the latter can't be used on an air-braked vehicle such as a truck or bus. There will be a valve somewhere, operated by that button, that locks the brakes on when that button is pressed - usually using a spring to apply the brake and air ...


0

This sounds like something is mis-aligned or bent on the brake assembly. A careful comparison of the mountings of the calipers to the vehicle; loose hub bearing allowing wheel free play; twisted brake hoses; metal brake pipes 'flattened' or bent between hose and master cylinder should all be checked.


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As it only happens when wet and cold, I suspect that the friction between pad and disc is increased by the rain water enough to cause the grabbing. One thought is that the the water is turned to steam and effectively increases the brake pressures effect on the brakes as the steam is unable to escape from between pad and disc. You should never the less run it ...


0

A vehicle fitted with a modern brake servo, as the Mazda 3 would have 'servo travel'. To determine how much travel you have: Engine off, pump the brake several times until it is hard and will not increase its pedal height anymore, press the brake pedal and hold it pressed, car in neutral start the engine still holding the brake pedal down with your foot. You ...



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