The Persona's auto gearbox is Mitsubishi's F4A42 4-speed automatic transmission. It's a conventional torque converter type auto gearbox. This transmission first appeared (as far as Proton is concerned) in the Waja, but has since continued to see usage in all the Campro-powered models.
INVECS-II refers to the control system used by the transmission. In most applications by Mitsubishi, the INVECS-II system comes with Tiptronic-style manual overriding.
From personal experience, this gearbox has quite an aggressive shifting programme.
Here's some official info on the INVECS-II from Mitsubishi UK:
http://www.mitsubish...ures/invecs.aspgreat info from the gunnerz.
let me add some. invecs is designed to adapt to an individual driving style. the original invecs actually comes with 4WD and 4WS from prototype HSR and HSR-II. if not mistaken the Lancer GT and Colt is using Invecs III with tiptronic function.
* INVECS = intelligent vehicle control system
Mitsubishi was one of the pioneer in adaptive auto transmission, designed to enhance driver control over the car - similar to a manual back in 1992 (if not mistaken it first appeared in the Mitubishi Galant Eterna 2.5 V6)
even though the waja, gen2 and persona shares the same auto gearbox but the TCU is tweaked differently. out of the three, gen2 has the most aggresive gearchanges. even a slight slope also it will drop a gear or two on its own which gets a little irrititating when we drive leisurely. and the worse is that the gearchange feels snappy.
in the persona, the problem was recitified so the response is a lot better and smoother.
the waja has the most relaxed and mild gearchange - it doesnt distract at all.