I have a strange problem when braking but it only occurs once I slow down to 7 MPH. Above that everything is kosher. Once the speedo hits 7 and I'm on the brakes I get a noticeable moan and push back / pulsating on the brake pedal as if ABS were kicking it. When it happens I get no ABS light or flashing ESP light. Once I slow down to about 3 or 4 MPH it goes away.

This all started last weekend after I had finished replacing my passenger side axle. My pinch bolt was seized so I had to drill it out. This morning I checked that ABS sensor and there was all kinds of metal shavings and rust (if you will) left over from the PB blaster. I thought perhaps the sensor was just dirty and giving a funny reading a low speeds. However, I cleaned things up as best as I could using compressed air and the issue still remains.

Any ideas? I was thinking about replacing the wheel speed ABS sensor but I'm not sure if that is my problem. If the sensor were bad, wouldn't the ABS light illuminate on the dash? I have no codes or warnings.

Thanks for the help,

Andy

 

I figured it out. I pulled the wheel speed sensor (magnet) from the hub and there were metal shavings all over it. They must've worked their way in between the axle and the hub. For a while, i was scared maybe the abs ring on the returned axel was bad, really didn't want to pull that thing again.