Ok, thanks. I didn't see anything about changing the bias on the thread. Maybe I missed it? But so you're saying you could set it to up t0 80% to the rear? How does that work?According to the 156 Crosswagon and 156 Sportwagon Q4 brochures, the torque split is 58/42, the diffs can apportion up to 80% of the power to one axle using (mechanical) torsen diffs (although this is nothing to do with the cars age - electronically controlled torque apportioning has been available since the 80s). Acab fitted the Q4 drivetrain to a 1750 engine from the 159/Brera (the Giulietta/4C blocks wont fit), the rear suspension is different on Q4 156s and there are no lowering springs available you could get some custom made, most of your questions are already answered in the thread or the other threads about this.