My Tahoe stopped moving on the freeway and we had it towed to Cottman Transmission. After testing, they said it had an internal transmission problem and after several days they said they had fixed it by replacing the torgue converter and giving the transmission a complete overhaul. This repair was stated to have a 6 month guarantee. My request for the old torgue converter parts was refused saying "they had been picked up by the "removal" people." I paid $2900 for this repair. After two days, the car did exactly the same thing... read full review »