Originally Posted by
Fudgey
You're thinking of a dog engagement box, like a seqential gear box.
A straight cut gear is exactly that, straight accross the mating surface. A helical gear kit is tapered to one edge to make it quieter as it has less surface area in contact than than a straight cut gear - hence a straight cut being stronger as there is more metal to metal contact.
A straight cut box will still have sycros, so wont change gear as fast as a dog box.
Pics
Helical top, straight cut bottom
https://www.google.co.uk/search?q=st...3n1brHnyeQjFM:
Syncro left, dog right
https://www.google.co.uk/search?biw=...MiN8jAPy2nDXM:
Thanks fudgey, obviously getting my syncros mixed up, I understood the straight cut part, but miss information was that the straight cut meant they slid together easier
I'm guessing what I know now I should of taken a more logical approach and realised my error
So the reason a dog leg works without the need of a clutch is due to the large spacing between teeth allowing the gears to mesh quickly without issue?