Consideration on All Wheel Drive Design

In case of all wheel drive construction with automatic trans-axle,
active torque split, the torque distributed changes occasionally.
So, the wheel alignment and constructive geometry must be more firmly established compared with two wheel drive automobiles.
Otherwise the steering reaction changes all the time according to the torque distribution F/R.
In short, the adjustment of wheel alignment is not an easy task for the engineer if compared with ordinal automobiles.

According to my experience, more than ten times the adjustment procedures were performed for these ten years.
Though difficult as it is after the establishing of alignment and geometry, the straight running performance is above words, just like an arrow it goes straight, of course this is because of all wheel driving train.