You can disable ESP traction control on a Diablo Tuner,
that sure made a difference to mine ....Here's my Trinity screen....
Heavy 305/50R20 all terrain Nitto Grappler tires almost 100 pounds per corner on stock 20's
I can literally melt the rubber from a stand still on BOTH rear tires, and I have an OPEN rear diff with 3.55's!
Full power is delivered equally to both sides of the rear axle if traction on both tires is equal...Proof:
...and yes, those are my Donut marks too
<click pic for vid>
and that was with just intake/exhaust and Diablo Trinity 93 tune
Since adding an Edge 2800 stall torque converter (flashes to 3000 rpm)
I can smoke the rear tires at will with just half throttle.
I have to set my transfer case on AWD (4-Auto)
to full throttle launch it now or it just sits and smokes the tires off
Recently installed a RIPP supercharger, 9psi boost and 500WHP, TC flashes to 3300 rpm now
Keep in in 4WD all the time now and it even Chirps into second gear
I'm probably going to install a Detroit TruTrac (Helical Gear Limited Slip carrier)
as soon as there's room in the budget, got a few other things to take of first.
Transmission, Water/Meth Kit and Aeromotive Fuel pump install this weekend,
then hopefully I can raise my shift points from stock (5600)