DT 540


Grease catcher than mounts behind the rear brake shoes but on top of the backing plate.  This keeps axle bearing grease and gear oil (if you have a leaking inner axle seal) from contaminating your brake shoes by channeling grease or oil to the exterior side of the backing plate. 

The part is symmetrical so it works for either side but the axle has to be pulled to replace this part.  Nissan.