Automatic Transmission Torque Converter problems of the 2018 Chevrolet Silverado 1500

Transmission started shifting weard contacted dealership. They state this unit is not under recall but it is an 6l80 and it is all over you tube and the internet about failures that start with the pm valve and/or the torque converter housing that is stamped but mounting brackets are welded to it causing harded steel to meet stamped steel causing friction and wear that polutes the remainder of the transmission and causes failure before 100000 miles; usually just after 50000ish. When transmission fails it can cause loss of propulsion or collion.

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that the vehicle was vibrating abnormally while driving 45 mph. There were no warning lights illuminated. The vehicle was taken to an independent mechanic who determined that the brake pads and rotors needed to be replaced. The mechanic later determined that the torque converter needed to be replaced. The local dealer was contacted, and determined there were no recalls on the VIN related to the failure. The vehicle was not diagnosed or repaired. The manufacturer was contacted and confirmed that there was no recall coverage for the failure. The failure mileage was approximately 75,000.

The contact owns a 2018 Chevrolet Silverado 1500. The contact stated that while driving approximately 55 mph, a warning light indicating that the transmission was overheating illuminated. The contact pulled over and turned-off and restarted the vehicle and continued driving. The warning light disappeared. The contact took the vehicle to pendarvis Chevrolet company, inc. (650 augusta rd, edgefield, SC 29824, (803) 639-8117) who flushed the transmission and removed the thermostat and plugged one line directly to the transmission. The failure recurred and the contact took the vehicle back to the dealer who then repaired the torque converter. The failure recurred whenever the contact would attach a load to the vehicle and the vehicle was returned to the dealer a third time however, the mechanic was unable to identify the cause of the failure. The vehicle had not been repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 59,000.

Transmission problems including slipping, shifting harshness, clunking, especially on downshifts and slipping when towing. Clunking noise/feel when slowing down/stopping. Especially noticeable on hills, but present on flat and downhill roads at surface streets as well as freeways and highways. Problem first brought to Chevrolet's service dept at 7000 miles and told it's normal. Again brought to service dept attention at approximately 12000 miles and again told it's normal. Problem continued to worsen severely and again brought to service dept attention at approximately 15000 miles. Problem diagnosed as failing torque converter. This was replaced. Problem with transmission continues after replacement and at 16197 miles it is now back at the service dept. Transmission is the 6 speed automatic.