pulsation when breaking.
July 18th, 2018, 6:31 PM
#1
pulsation when breaking.
My 01 Suburban 1500 has an issue when stepping on the brakes. It pulsates to a point that I can see my foot moving while on the brake pedal. The ABS light comes on when starting the engine, but turns off and stays off. My first guess was that it was a warped rotor, so I replaced the front ones along with the pads, but the pulsing continues. The rear brakes have 34,000 miles on them but look OK, but I will probably take them off next. But this guesswork is costly with no return so far. What else could it be?
July 18th, 2018, 9:42 PM
#2
What do you have; rear rotors or drums?
warped front rotors transmit primariliy thru the steering wheel and some thru the brake pedal
warped rear rotors transmit thru the brake pedal...Its possible to be something other than rear rotors but warped rotors are the most common cause. I've seen warped rotors and out of round drums right out of the box. 30 000 is plenty of time for runout to occur.
warped front rotors transmit primariliy thru the steering wheel and some thru the brake pedal
warped rear rotors transmit thru the brake pedal...Its possible to be something other than rear rotors but warped rotors are the most common cause. I've seen warped rotors and out of round drums right out of the box. 30 000 is plenty of time for runout to occur.
July 21st, 2018, 10:06 AM
#3
Also, when you replaced the rotors, did you check or replace the caliper guides? Calipers are supposed to float as there is always a little bit of runout even on new rotors. Sticky or stuck guides can cause pulsation. You may be able to tell if it’s coming from front or rear by feel on steering wheel. It’s not likely a problem on front would be identical on both wheels and you may feel the steering wiggle with the pulsation when coming to stop if problem is on front.
July 23rd, 2018, 11:54 AM
#4
What do you have; rear rotors or drums?
warped front rotors transmit primariliy thru the steering wheel and some thru the brake pedal
warped rear rotors transmit thru the brake pedal...Its possible to be something other than rear rotors but warped rotors are the most common cause. I've seen warped rotors and out of round drums right out of the box. 30 000 is plenty of time for runout to occur.
warped front rotors transmit primariliy thru the steering wheel and some thru the brake pedal
warped rear rotors transmit thru the brake pedal...Its possible to be something other than rear rotors but warped rotors are the most common cause. I've seen warped rotors and out of round drums right out of the box. 30 000 is plenty of time for runout to occur.
July 23rd, 2018, 9:21 PM
#5
can you not just unbolt mount without axle removal? I tack welded the bracket in place and was going to repair it later. the tack weld held up so I never replaced or extracted the broken bolt.
