well this is the kicker since supra is fat pimp the lock up is not harsh at all  and is smooth in gauge ment 
i remmber i had 1.5 way in my rx7  and the lock up in that car was crazy  but it was 1.5 way  weight play big factor  whne it come sot lock up 
if i down shift and drop the cluthc i get chrip and that is all
i have tried clutch drop skid the supra just wonte do it cause it is far to heavy of a car 
but i am happy wiht my car and my 2 way i plan to use it for road race and auto x 
i have beaton my record down the windy pass wiht this 2 way so i am happy 
and if you don't like it clock it to a 1.5 way  easy as that once the perload is asjut you can pop the diff in and out when ever you want 
i highly recommend this thou 
  
http://www.marlincrawler.com/htm/diff/pickup_diff.htm
Solid Spacers
Solid pinion spacers replace the factory crush sleeve. These spacers reduce the need to retighten pinion nuts and reduce R&P failure due to excess backlash.
MC-14692, Solid Pinion Spacer, V6 & High Pinion, $29