How To Tell If Transmission Is Bad Automatic. Luckily, there are a few blown transmission symptoms to look for that will tell you a transmission is going bad. This is often one of the symptoms of low transmission fluid.
With an automatic transmission, you may hear a sound or some humming, or even buzzing sounds. A bad transmission solenoid can negatively affect many components of your automatic transmission. Many times there will actually be a burned, smoky smell to the fluid as well.
What are signs of a bad transmission?
With a manual transmission, you know you have issues when you grind into every gear. If your transmission and torque converter have suddenly changed their performance profiles, check the stator tube during a full disassembled inspection to make sure this sometimes overlooked component is operating properly. How do you know when your automatic transmission is about to fail you? Internal mechanical failure is the root cause of transmission ‘slippage’.