Quite rare I believe.... reverse gear is helicoidal
 

I believe most MT have a straight toothed reverse gear. The GT86 has helical gears. That's why our cars reverse relatively quietly....


PS: no question here... just noticed this while browsing the repair manual....

Interesting, I never thought about it, but is quite while reversing. Where did you find that in the manual?

It all makes sense now!! Never thought about the fact that we get no reverse whine..

My GTI is like that, I think it's a lot less common in Japanese cars.

lol I actually was kinda sad when I first put the car in reverse and didn't hear (what I call) the Honda whine... :bonk:

Why?

Pretty interesting stuff. Generally straight cut gears are tougher than helical or spiral toothed gears but are noisier and less costly to manufacture (on average). Reversed hardly gets used and is geared the lowest so in most cases it makes sense. Race cars have straight cut gears for the heavy demands or track and what not and noise really is not an issue ;-)

Can see it here (in the manual transaxle components section of the repair manual) :


http://i39.servimg.com/u/f39/18/86/19/63/helica10.png

Am I missing something or does that diagram omit the actual reverser gear?

no, the Arrow points to it, unless I'm wrong!,

.. straight cut gears because they are stronger and thus can be skinnier in size which was a huge deal in the subaru 5 speed. not so much with the 6

http://na.techinfo.toyota.com/t3Port...C266433E02.png

http://na.techinfo.toyota.com/t3Port...C266434E02.png

Thanks for the information.

I've often wondered why my neighbor's honda sounds like an old model model A when it is backing up .... :popcorn:


humfrz

You need a third gear to reverse the direction. Usually goes in between the input shaft reverse gear and an output shaft gear.