The range in the applications it is limited to médium weight and light vehicles of their own italian Brand.
As well as all the mechanic gear boxes in which the power transmission (force) is done through pairs of gears, we can find three critical points:
Oil: see OIL AND DOCUMENTATION tab.
Clutch: we all agree that is the key element. The clutch is the mechanic element that suffer the most wear inside the kinematics chain, because resist all the brake actions and the high temperatures produced during its operation. Its controlled revision and substitution allows a LONG LIFE of the synchronized and so, the gearbox in general.
Air circuit (in case that the selector has an extra help): is dangerous and needs to be controlled because dampness are so critical for the valves. If those valves get rusted, because are not operating normally, the gear changes can be sharp or “hard” instead of going smoothly.