The shuttle shifter on my MF FEL/BH is all hydraulic with a slushpot (fluid coupling) between the engine and the wheels. The factory manual encourages shuttling forward to reverse and back without taking your foot off the throttle, even at full speed. For FEL work, this can make a big difference. The hydraulics are cleverly designed to engage the fwd/rev gear clutches gradually. If you have a full loader and are backing up at speed, and shift into forward, then the front wheels lift and you feel like yelling "Hi Ho Silver, Away!!", or at the very least "YeeeHaa". My wife looks at me funny when I do that.
k2