they stink
- The low gear feature is pointless. It'd be nice if low gear affected torque at all - but it doesn't. You can get the exact same effect by shifting into Low+ and reducing throttle (or so-called throttle)
- Auto is a never-ending hell of automatic gearshifts. The tightened up gear ratios cause automatic to mash through gears that can't possibly be sustained before stalling out and lurching back to first to start over again. It's horrible. The best gearboxes in this game have wide gear ratios because this avoids the flawed automatic transmission as much as possible
- They waste a ton of fuel compared to other options
Without a better gearbox system they're just really bad