I have a 1997 Monte Carlo z34 that i just put a bone yard ABS motor and master cylinder in. It works fine and everything is bled out but when i reach 25 mph or higher as i step on the breaks there is a dull ticking that gets faster the more the car slows down and the low trac light comes on and it sounds like the ABS motor engages. Also it feels like the brake booster is a little loose if that could cause it. CAN ANYONE PLEASE HELP!

 

Said you got it from the boneyard...

Did you get it off a wreck?
If so, maybe its defective as well?
Something to consider...

 

Im not sure it was from ebay. Could the wheel speed sensors do it? The right front seemed to be glitching on the tech 2 data display

 

Try replaceing it....
and see if the "data" goes away for sure.
Cant hurt.