2003 LR Disco SE7 - replaced steering pump. 2 different gearboxes installed. Repl 1st steering pump and gearbox as box was pouring PSF and ruined pump. New Pump and reman gearbox. Now, steering loose in straight position and intermittently while making right turns, the steering wheel will "stick" and "pop" into turning when you force the wheel past the sticking point. Was told gear box bad, but be missing a tooth in the gear itself, so replaced the box today with another. Doing the same thing now, only a little further into the right hand rotation than before. HELP!!!

 

Is mechanic doing the work "centralizing" the steering, then following the adjustment procedure in the RAVE? Both boxes rebuilts?