In January 2015 started hearing growling noises from my rear differential at low speeds. Received a warranty enhancement notice in January 2016 regarding issue. Took to local dealership (only one within a 100 mile radius of me) was advised they could not check mechanics of car unless I was willing to buy new tires. Stated my tires keep them from checking the other parts of the vehicle. What a crock. Attempted to contact Toyota on 04/16/2016 to no avail.