1999 Jeep Grand Cherokee tires problems

Left rear tire had tread separation and sidewall circumferential disintegration, with loss of control of the SUV. It was dry road, daytime, outside temp about 55f, speed about 42 MPH, and car had been moving for about 10 minutes from cold start. Car careened side to side of 2 lane medium speed highway, finally stopping in about 1/4-1/3 mile. Required extremely vigorous muscle to limit lateral travel and torque roll of vehicle.

Dt*: the contact stated while driving 70 MPH on a normal highway, a tire failure was noticed. No warning signal alerted the contact. The rear left tire blew out after tread separation and the vehicle sustained body damage. The vehicle was taken to the dealership who determined the rear right tire's tread had separated. The manufacturer had not been contacted. The tire was a dunlop p235/70r16.