from my understanding from the inspector that inspected my truck and my buddys friend that used to inspect said it wont fly, and that both WHEELS need a brake.... just think about it... if your u joint brakes your driveline wont hold your truck... yes your hydrolics can go out and loose the braking power but you still have that mechanical connection to the e brake at the wheels.... yes it is a bunch of bs in my opinion but sometimes stupid stuff eventually makes sense... and i serched real quick about the driveline and everything i saw said they werent legal....