I've never heard of O'Reilly brand anything except for the guy on the
radio. Volvo lists some caveats deep in the literature mumbling about a
license number that should be stamped on the bulk drums or somwhere n
the case box for quart bottles that authenticates the formulation of the
fluid. If the license number exists it's pretty much the same as motor
oil meeting the SAE flavor of the year. If the old trans fluid was well
spent and there was some wear in the transmission friction parts then
the new fluid with a fresh friction modifier package can provoke a
different shift feel. I use Dextron III from Pennzoil or Quaker State
(same company now) and it indeed does have a license number on the
product, for what it's worth, but I seldom have any problems on a car
that was shifting fine to begin with.
Bob
