How does the park function work on a autobox?

[chrisJDM]

just trying to troubleshoot a problem where my rear brakes are sticking on a bit, i have tried loosening off the handbrake with no effect. also the brake light stays on the dash.  How does the park function work??? just wondered if its related.

[m1tch]

I believe that the park function on the auto box locks all the gears in the box so nothing can move. It might be a seized caliper that is binding though, what does the brake light look like?

[chrisJDM]

well its the light that usually goes off when you take off the handbrake.  i have undone the nut on the side of the handbrake and comes loose nd had no effect.  the rear brakes seem to be rubbing badly both sides

[steve garbutt]

The hand brake light can also come on when the brake fluid is low.
If your working on the brakes on an auto, pop it into neutral, then you can rotate the wheels.

[chrisJDM]

thanks steve i need to check the fluid, assumed it was ok as changed not long ago but need to have a look.  :Thumbsup!

[chrisJDM]

Just checked the brake fluid and it\'s just below MIN so gonna top it up and see wot happens

[L18M]

if the car is in park, the hand brake light shouldn\'t be on.

[chrisJDM]

Topped up the brake fluid and the light now goes off so that problem is sorted, also bought myself a re- winde tool for thebrakes so next weekend will try unwinding them a bit and see if that stops them rubbing

[steve garbutt]

Remember your rear wheels wont spin like your front wheels as there is drive train resistance.
It almost feels like your hand brake is stuck.
Do you have the same resistance on both rear wheels ?

[chrisJDM]

I have not actually jacked the car up when I drive it you can hear the rear brakes rubbing badly, also really hard to push on the flat