1996 Chevrolet S10 transmission problems

On highway, billows of smoke appeared from underneath truck; engine stalled. When started up again, would not go over 35MPH. Mike at gerry lane chevy in baton rouge, la (repairing dealer) stated 'major internal failure' that at his best guess was from a loose part from the factory, which finally freed itself and caused failure. He described the underside of my truck as 'black' from the incident. I paid 1890.00 for a new transmission...mike sd failure was not due to driving habits or any neglect.

Tl*the contact owns a 1996 chevrolet s-10. While driving approximately 70 MPH the vehicle stopped accelerating and the rear wheels locked up. The vehicle was towed to an independent mechanic where he was informed that the transmission locked. The vehicle was not repaired. The failure and current mileages were 99,000.