@pjfsail
Whine on acceleration only is almost certainly originating with the ring and pinion. Transmission pumps work at constant load, more or less, and have nothing to do with whether power is being transmitted or not. Pinion bearings which are bad can make lots of whining noise, but that noise is unaffected by transmission of power, IOW, acceleration or deceleration. Pinion bearings badly worn WILL allow misalignment of the gears, and CAN cause whine upon acceleration, because the forces trying to pry the gear teeth apart are high when accelerating, but very low when decelerating.
First order of the day would be to inspect the ring gear teeth. If shiny and bright, no scoring, galling, or dull-looking appearance, pinion bearings OR differential side bearings would be needed. imp