torque to the left...
as in Roll left or,
yaw left??? those are 2 different things.
If u feel roll to the left, check motor mounts and tranny mount; and.
if you feel yaw to left, then yes, check u-joint, and differential oil(u might be low on oil so that the gears dn't "rock" as they should inside the diff..
other than that.. i wd look at alignment, tire pressure,and if it's been going on for sometime... then check tread wear. they can tell u what it is thats happening ;-)
let us know..