Mitsubishi vehicles are equipped with 4-speed, 5-speed, or 6-speed automatic transmissions depending upon model year and engine application. Using a planetary gear arrangement and a series of clutch assemblies, an automatic transmission allows the engine, to provide a range of speed and torque outputs necessary for vehicular travel.
The clutches in an automatic transmission are operated quite differently from a single clutch in a manual transmission. These clutches consist of several elements of plates and discs that are actuated by hydraulic pressure. The hydraulic pressure is formed by the automatic transmission fluid being pressurized and controlled to apply the clutches, which then shift and hold the transmission into other gears.
The lack of fluid or dirty fluid can affect the hydraulic pressure, causing clutches to slip and fail.
The Continuously Variable Transaxle (CVT) has been designed to provide excellent fuel economy and smooth acceleration at all vehicle speeds. The CVT is comprised of two pulleys and a steel belt which delivers ratios from low gear through overdrive without feeling shifts points as with a conventional automatic transmission.