Avensis ABS braking syste

My car's braking system is juddering from time to time, the brake shoes are
ok. If I brake hard the brakes seem fine but when slowing down sometimes
and braking softly, the car will judder. The car is 2000 model, can
anyone advise please.

"work3791" <ginajunepritchett@tiscali.co.uk> wrote in message
news:0f5f0b6e1f58ce3bc1230e606f57e569@localhost.ta lkaboutautos.com...
> My car's braking system is juddering from time to time, the brake shoes
> are
> ok. If I brake hard the brakes seem fine but when slowing down sometimes
> and braking softly, the car will judder. The car is 2000 model, can
> anyone advise please.
>
Juddering while braking is generally caused by warped brake rotors ("brake
discs") or warped brake drums, not by shoes or pads.

You can check if the rear drums are warped by engaging the parking brake and
seeing if the juddering occurs. If not, then the most likely cause is the
front brake rotors, which will need to be replaced.
--
Ray O
correct the return address punctuation to reply

I agree, Ray O. If work 3791 had access to a machinist's dial indicator
and a mag base, he (she?) could quickly determine the 'runout' of the rotor.

I'm with Ray on this one, it sounds like you have warped rotors. He suggests
a test for warped drums, but I suspect that test will show the drums are OK.

As Ray suggests, set the parking brake a few clicks until it just begins to
grab, and if the drums are warped, you should feel it. Add a click or two
until you car sure the brakes are round, then get the front rotors changed.




"work3791" <ginajunepritchett@tiscali.co.uk> wrote in message
news:0f5f0b6e1f58ce3bc1230e606f57e569@localhost.ta lkaboutautos.com...
> My car's braking system is juddering from time to time, the brake shoes
are
> ok. If I brake hard the brakes seem fine but when slowing down sometimes
> and braking softly, the car will judder. The car is 2000 model, can
> anyone advise please.
>

I had a Supra for nine years, I soon discovered that if I washed the car
in the driveway on a Sunday afternoon and didn't use it again until I
drove to work Monday morning there would be shiny clean patches on
otherwise rusty brake disks, which would then cause brake judder under
gentle braking. The solution was to always drive the car after had been
washed. (Even at today's prices you can buy a lot of petrol for the
price of the brake disks.) I think later models had a more rigid front
brake assembly which probably helped.
--
Neil J. Harris

This may not be the case, after having 2 Avensis's, both suffered judder.
Does the car have Alloy wheels. If so, remove the wheels and discs (rotors),
clean the hub, disc and alloy wheel mating face's and rebuild. When
tightening the wheel nuts, "cross" torque the nuts evenly or use a torque
wrench. I have seen this many times where the alloy wheel distorts the disc
due to a build up of corrosion between the faces. People happily change the
discs and it cures the fault but only because it has clean faces.

Regards
Steve Cook
Service Manager

steve.cook@truck-services.co.uk
www.truck-services.co.uk


--




"work3791" <ginajunepritchett@tiscali.co.uk> wrote in message
news:0f5f0b6e1f58ce3bc1230e606f57e569@localhost.ta lkaboutautos.com...
> My car's braking system is juddering from time to time, the brake shoes
are
> ok. If I brake hard the brakes seem fine but when slowing down sometimes
> and braking softly, the car will judder. The car is 2000 model, can
> anyone advise please.
>