Don't have a V6 so can't tell you, but it does sound high.
You have a 4ECT Automatic transmission
Can you feel it shift from 3rd to 4th(OD)?
From a stop watch the tach and see how many times it drops, i.e. shifts to a higher gear.
I think the 1993 had a button on the shifter to turn OD on/off, OD is 4th gear, overdrive
Google: Electronic Control Transmission (ECT)
The autoshop101 site has Toyota workshop reprints, PDF, not large downloads.
Good info on how to test these electronic shift transmissions
Last edited by RonR; 11-21-2012 at 12:40 PM.