did you guys r&r everything in the tranny, or just what seemed to be the affected parts?
hmmm.... strange indeed... makes me wonder if there'* some 'foreign material' in there...
well good luck on getting it right this time - just make sure you take everything out, and make sure that everything that goes back in is as clean as humanly possible, w/o leaving any fibers or material on anything (oh yeah, and soak the clutch packs in tranny fluid for a while before you do it, but i'm sure he knew that one already, since you didn't burn your clutches : ) )
96 LeSabre (L36)
95 Olds LSS (L67)