Tips to Identify and Diagnose Transmission Failure
Sounds associated with gears and bearings vary or disappear depending on the gear position selected and vehicle speed. From those sound clues, the technician may look at the transmission power flow charts to determine which gears and bearings are in operation when the sound occurs. Once the noise has been isolated, it may be time to pull the transmission out of the truck to take a look inside. This is when things get exciting.