A typical transmission filter: Transmission fluid is nothing more than hydraulic oil designed to produce internal
hydraulic pressure and cool and lubricate the unit. Transmissions by their very nature produce wear material
that has to be filtered out of the fluid. This is the job of the transmission filter. Whenever a transmission
service is done, use an OEM-quality filter to ensure maximum filtration. Transmission filters take various
shapes to fit the pan configuration of a particular transmission.
Oil Filter
The oil filter is the storehouse for dirt that gets into your engine’s oil. It collects
fine dirt and wear-material produced by the engine as well as dirt introduced into
the system by the air intake. When changing the oil filter, always make sure to
use a high-quality oil filter of OEM (original equipment) quality. Some knockoff
and cheap filters omit critical parts such as check valves (which maintain prime
on a cold engine) and fine micron filter media (which are capable of filtering out
the smallest spec of dirt inside the engine). Remember, you get what you pay for.
Change the oil filter every time you change the oil according to the carmaker’s
maintenance schedule, for severe service every 3,000 miles, for normal service,
every 6,000 to 7,000 miles.
Transmission Filter
The transmission filter is the storehouse for dirt in the transmission. Over time,
transmissions drop wear material into the pan. This wear material is sucked up
into the transmission filter to remove it so it doesn’t circulate through the system
and cause trouble. Regular transmission service usually falls within the 25,000-