Don’t Stop Suddenly. Like fast starts, sudden stops can damage drivetrain components like engine and transmission mounts. These can lead to transmission damage. After any sudden emergency stop, it would be wise to have your mounts checked.

10. Don’t Play Transmission “Doctor”. Over the counter additives that are supposed to stop leaks or make the transmission shift better many times contain chemicals that may cause worn seals to swell. This can interfere with the function of these operating rubber parts and lead to severe damage.