"Grabby" brakes
03-10-23, 09:28 AM
#2
Moderator
Do you switch cars? Sedan vs SUV the ball of the right heel has to adjust. Whenever I switch sedan to SUV I have the same issue.
Apart from that, there can be an issue with the brake pads and the surface of the rotors. There is a procedure to burn off the imprint by successive sharp braking [there again the attempt is to heat up the surfaces and not lock up [burn rubber]. Do that on an empty road of long parking lot where you can speed up before applying brakes.
Salim
PS: don't forget to purge fluid from all pipes/hoses/reservoirs/cylinders every other year.
Apart from that, there can be an issue with the brake pads and the surface of the rotors. There is a procedure to burn off the imprint by successive sharp braking [there again the attempt is to heat up the surfaces and not lock up [burn rubber]. Do that on an empty road of long parking lot where you can speed up before applying brakes.
Salim
PS: don't forget to purge fluid from all pipes/hoses/reservoirs/cylinders every other year.
Last edited by salimshah; 03-10-23 at 09:30 AM. Reason: PS
03-10-23, 12:26 PM
#3
Pit Crew
Thread Starter
It grabs more than switching cars would do. THe RX350's I have do not do that.
I was thinking more along the lines of either a problem with the calipers or the ABS unit. So I was checking if anybody else ever experienced the same issue and how did they fix it.
I was thinking more along the lines of either a problem with the calipers or the ABS unit. So I was checking if anybody else ever experienced the same issue and how did they fix it.
03-10-23, 05:16 PM
#4
Advanced
Mine did that when I first got it. I just thought it was normal until I changed the brake pads, then it went away. I also changed the rotors at the same time because it would shimmy when braking at high speeds.
03-10-23, 05:41 PM
#5
First DIY I’d consider is flushing the break lines with fresh fluid. After that new pads/rotors, after that new calipers.
03-11-23, 04:46 PM
#7
Advanced
When it is wet out or snowy, slam the brakes on and it will activate the ABS. Of course you'll want to do this in a safe place, maybe an empty parking lot or a deserted stretch of road. You'll feel it vibrate a little when the system engages. I'm sure there's a piece of equipment that tests the system, but someone else will have to chime in on that.
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03-12-23, 12:59 PM
#8
Moderator
ABS is active all the time. On a dry day [good traction] if you slam the brakes, you should see rubber left on the road in skips pattern. Brakes grab the rotating wheel and they lock up, the abs then release the pressure to let the rotation start and then the brake pedal says ... stop and the pressure bypass is stopped allowing hydraulic pressure to be applied full bore and the wheel locks up and then process repeats. ON-OFF-ON_OFF .... till the vehicle is stopped.The important part is the driver is not supposed to modulate and keep the full force on the brake pedal.If the traction is poor [wet/grave/bald_tires] the the ON time interval is reduced or the OFF steps in early.
If on the other hand you see long continues rubber on the road, then ABS is not kicking in.
Salim
If on the other hand you see long continues rubber on the road, then ABS is not kicking in.
Salim
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