Blood pressure is usually expressed in terms of the systolic pressure (maximum during one heart beat) pressure over diastolic pressure (minimum in between two heart beats) and is measured in millimeters of mercury (mmHg), above the surrounding atmospheric pressure (considered to be zero for convenience).
Corrosion on the terminals is due to hydrogen gas being released from the acid in the battery. It mixes with other things in the atmosphere under the hood and produces the corrosion you see on the terminals. Generally, if the corrosion is occurring on the negative terminal, your system is probably undercharging.
In fact, thereâs a good chance you just found your transmission problem. Thatâs because nearly every shift on todayâs transmissions is operated electrically through a computer system. And that computer system gets its power from â you guessed it! â the battery. Battery terminals like this can cause a wide range of transmission malfunctions. Even if your engine starts and runs fine you may have a low voltage problem that can affect your transmission's operation. So an intermittent voltage drop from the battery can cause all sorts of interesting problems with transmission operation.