Calcium compounds are widely used. There are vast deposits of limestone (calcium carbonate) used directly as a building stone and indirectly for cement. When limestone is heated in kilns it gives off carbon dioxide gas leaving behind quicklime (calcium oxide).
How to Change Transmission Fluid. Transmission fluid needs to be changed from time to time in order to extend the life of the transmission, usually every 30,000â60,000 miles (48,000â97,000 km) (sometimes more â check your owner's manual for service intervals).
Transmission fluid pump This pump is the key to saving you time and money when you change transmission fluid. You should change your automatic transmission fluid according to the manufacturerâs recommendationâ whether thatâs 30,000 or 100,000 miles.