Sounds like the CV's are at too much of an angle. Try installing a diff drop.
One thing that doesn't make sense is you say you have an LX470 but "lowered the torsion bars to lower the front end" on an LX the TB have nothing to do with ride height unless you've swapped your suspension. Maybe you've done that and I've missed that post. Either way...the front end of your truck is too high, maxing out the CV angle, causing the vibration. If you haven't swapped your suspension, adjust the height sensors to lower the front end enough.
One thing that doesn't make sense is you say you have an LX470 but "lowered the torsion bars to lower the front end" on an LX the TB have nothing to do with ride height unless you've swapped your suspension. Maybe you've done that and I've missed that post. Either way...the front end of your truck is too high, maxing out the CV angle, causing the vibration. If you haven't swapped your suspension, adjust the height sensors to lower the front end enough.