Update......
I traded that truck for a 99 runner w/ 3.4/5sp. (same r150f) It has the same whine on a lower scale. I also looked/test drove a 95.5 t-100 with the 3.4/5sp ( pre taco r150f) and it had the same wine. I refuse to put a tranny in this runner as I really think it may be the lack of grease on the throwout bearings in these trucks. Any thoughts? Is this a comon problem with this tranny?