I've tried searching 'ABS' on the forum before and didn't have any luck, if I remember rightly it's because ABS is too short for the search to work properly.
I've just got over a similar problem with mine after messing with the CV joint, in cleaning it off before I started work I must have brushed away too much of a rusty tooth on the ABS reluctor ring on the joint, the teeth on the ring cause a variation in the magnetic field as they pass the sensor so the ABS knows the wheel is turning, if the wheel stops the ABS gets no signal so releases the brake to let the wheel turn, but the same thing happens if there's a missing tooth (or teeth). Fitting a new ring solved my issues. Might be worth having a look at the reluctor rings on yours especially as the driveshaft is from a donor. A new ring will look like the photo below, my old one was significantly more rusty and crusty
We discussed it recently here
Help !! Dither mode on Spending Money