Originally Posted by
party_wagon
Ball diffs are used in 1/10th scale cars because they weigh less. 20 years ago when ball diffs hit the market people needed something light because lighter was faster since power was at a limit. Gear diffs are heavier, but they are more durable. Since people can over power these cars & don't have to worry about power they now want the durable solution that will keep up w/ their li//bl setup.
Not sure what you are comparing here, but Losi was the first to use a balldiff in a production car tranny and I seriously doubt it was any
lighter than what else was on the market. More efficient overall tranny undoubtedly than the AE 6-gears that relied on the spur gear for it's diff action, but the Tamiya/Kyosho plastic gear diffs were just as light (but crap and blew up regularly).
I'm sure the new AE geardiff is a much better mousetrap, but only time will tell.
