The lines get clogged because they aren't run in an upward slope. If there are any dips in the line oil WILL pool there and plug the line. If you run the rear axle line to the front of the vehicle, it'll be very hard to avoid having a dip in the line. Run to the rear and always upward and you won't have a problem. Mine has been fine since I re-routed the rear hose about 4 years ago.