Complex sentence: It's Ford's 3-speed ATX that was used in the 1980's and early 1990's, mainly the Ford Tempo and Mercury Topaz with the exception that it's controlled by electronic solenoids instead of hydraulics and now has a 4th-speed overdrive.
Split into simpler sentences: It's Ford's 3-speed ATX that was used in the 1980's and early 1990's. Mainly the Ford Tempo and Mercury Topaz with the exception that it's controlled by electonic solenoids instead of hydraulics and now has a 4th-speed overdrive.