custom tune could help cause traction issues.
I have a custom hemifever tune. Its the crappy 3.55 gears and brand new tires that ensure that I dont have traction issues.
then you probably need a gear swap to have traction issues. your hemifever custom tune should make more power than a canned tune.
your hemifever tune + 4.10 or 4.56 gears should smoke your tires!