Got a 98 Dodge Dakota 4 WD Auto w/ ABS......problem being the front brakes keep locking up...r/r'd both calipers, pads, hoses, M/C & prop valve....problem keeps coming back....flushed and renewed fluid to all four wheels, adj. rear brakes.....No DTC's or ABS fault codes stored...Brake booster & check valve OK....Anybody ever hear of anything like this and know what it is, there will be some Hawaiian goodies in the mail for them if they can make it right! Aloha!

 

Need more info... try and be more explicid, could be a few other things, i.e. Power Booster could be faulty. Could also be a sensor problem. When do they lock up and under what conditions? What does the pedal feel like when Lock Up happens? Any shaking?

 

does it rain a lot cause whenever it rains a lot my dads brakes lock up is ur truck parked a certain way that water might get onto and into ur brakes

 

I've seen cheap POS Tires cause the front wheels to lock-up
Look for dry-rot or an uneven tread wear pattern

 

I'll bet you have an RWAL system, Rear wheel anti-lock ONLY!!!
so it will be normal for the front wheels to lock-up with limited traction.