Gs300 Sport (ii) Brake Wear Problem

[FastLemon]

:duh: Hi

Can anyone shed some light on a problem that seems to be happening on my 2000 GS300 Sport (Series II)?

Both front and rear discs were replaced and new pads fitted in May last year. After a gentle bedding in period, the brakes felt ok but are not particularly exceptional. However, the rear brakes pads wore out far sooner than the fronts, which still had around 50% left. Also, the rear tyres showed significantly more wear than the fronts again, both were replaced at the same time.

Is there any form of adjustment that could explain this imbalance, i.e., bias to the rear brakes? Has anyone experienced the same problem? If so, how can it be fixed?

Hoping someone knows the answer.

:duh:

[P4UL T]

The bias is not adjustable and the braking force is distrubited via the ABS system. So that will not be your problem

Maybe the rear calipers may be binding or sezed, with the wheel off the ground, do the wheels spin freely?

[FastLemon]

The bias is not adjustable and the braking force is distrubited via the ABS system. So that will not be your problem

Maybe the rear calipers may be binding or sezed, with the wheel off the ground, do the wheels spin freely?

Hi Paul

The calipers are all fine - all checked by a friendly Toyota dealer. However they mentioned something about the possibility of a fault with the "brake weight compensator" causing unequal braking between front and rear, which they couldn't check. Do you or does anyone out there know anything about that?

Looks like I'm being forced to go to a Lexus dealer for the usual high cost affair!!! :duh:

I hope not...

Cheers...

[ironduke]

I don't know right now what the brake problem could be - and therefore, if the rear tyre wear is linked

but, on a rear wheel drive car the rear tyres should and will wear quicker than the fronts.

I am assuming that toyota stuck the car on rollers and checked that all the brakes where working properly individually - if not, check the effectiveness of the front brakes or, as previuosly stated, check if back are binding.

Also, maybe a long shot, but check that the pad fixings - metal clips (top and bottom for each pad) and metal 'V' springs (one per caliper) are fitted correctly.

[LexAzur]

Hi

I have a 2001 GS 430 and my does the same, so far I have had 2 new sets of rear pads and still on the same front pads.

The wheels spin freely on mine too

[The Bold Boy]

Hi

I have a 2001 GS 430 and my does the same, so far I have had 2 new sets of rear pads and still on the same front pads.

The wheels spin freely on mine too

I may be wrong but I seem to remember reading about a sensor on the car that assists braking when you have four or more occupants in the car at once and there for needing less pressure on the brake pedal.This sensor may be sticking .

[BigCliff]

Hi

I have a 2001 GS 430 and my does the same, so far I have had 2 new sets of rear pads and still on the same front pads.

The wheels spin freely on mine too

I may be wrong but I seem to remember reading about a sensor on the car that assists braking when you have four or more occupants in the car at once and there for needing less pressure on the brake pedal.This sensor may be sticking .

Yep, some cars have a hydraulic valve/regulator that regulates rear braking force depending on how much weight there is in the back of the car from passengers and luggage. If the rear brakes are applied too hard the rear wheels can lock up as weight goes forward on braking and that can cause a skid/crash.

[P4UL T]

Hi

I have a 2001 GS 430 and my does the same, so far I have had 2 new sets of rear pads and still on the same front pads.

The wheels spin freely on mine too

I may be wrong but I seem to remember reading about a sensor on the car that assists braking when you have four or more occupants in the car at once and there for needing less pressure on the brake pedal.This sensor may be sticking .

Yep, some cars have a hydraulic valve/regulator that regulates rear braking force depending on how much weight there is in the back of the car from passengers and luggage. If the rear brakes are applied too hard the rear wheels can lock up as weight goes forward on braking and that can cause a skid/crash.

Correct, but NOT on a car with ABS fitted

[BigCliff]

Hi

I have a 2001 GS 430 and my does the same, so far I have had 2 new sets of rear pads and still on the same front pads.

The wheels spin freely on mine too

I may be wrong but I seem to remember reading about a sensor on the car that assists braking when you have four or more occupants in the car at once and there for needing less pressure on the brake pedal.This sensor may be sticking .

Yep, some cars have a hydraulic valve/regulator that regulates rear braking force depending on how much weight there is in the back of the car from passengers and luggage. If the rear brakes are applied too hard the rear wheels can lock up as weight goes forward on braking and that can cause a skid/crash.

Correct, but NOT on a car with ABS fitted

[BigCliff]

Hi

I have a 2001 GS 430 and my does the same, so far I have had 2 new sets of rear pads and still on the same front pads.

The wheels spin freely on mine too

I may be wrong but I seem to remember reading about a sensor on the car that assists braking when you have four or more occupants in the car at once and there for needing less pressure on the brake pedal.This sensor may be sticking .

Yep, some cars have a hydraulic valve/regulator that regulates rear braking force depending on how much weight there is in the back of the car from passengers and luggage. If the rear brakes are applied too hard the rear wheels can lock up as weight goes forward on braking and that can cause a skid/crash.

Correct, but NOT on a car with ABS fitted

Hence the word SOME

[Big Den]

I think its fair to say that since asbestos was taken out of the pads they and the discs do not last as long as they used to, it seems almost par for the course to have to replace discs every 2-3 years. I also think the quality of the disc metal is not what it used to be either.