The car is a 2002 Volvo s40, automatic, and 150k miles.
The car needed new front brake pads and a wheel bearing. I broke the wheel speed sensor while trying to remove it, so I ordered a new one. Got the car all buttoned up. We just drove the car with out the speed sensor (no abs or speedo) for a few days until the new sensor came in the mail. Everything worked just fine apart from the ABS and speed0. Braking was fine.
New sensor arrived, installed in 10 minutes. Took it for a drive and now when you do a normal braking to a stop, just before you stop, say 5 mph the pedel drops a bit, vibrated like abs is kicking in, and you loose a bit of braking power. If you get up to 25mph, do a hard (slam) stop, no problem. Slow stop = weird funkyness at the end of the stop. Feels very wrong and odd since it seems to loose braking power there.
I pulled the ABS fuse and drove it to see what would happen, brakes just fine (sans the lack of ABS). No weird vibrations or odd pulling or diving. Just “normal”
So whats the dealo? I am going to try bleeding the brake lines tomorrow to see if that has anything to do with anything. But really, its a shot in the dark.