Transmissions (Need tech help!)

[jpro8071]

Okay - I'm about to get started on the 700cc high-compression engine for Bonneville (gee - three weeks . . . not much time!)
Have a transmission question - can anyone tell me how to differentiate the syncro vs. non-syncro trannie by looking at the internal parts?
I know that the one shifting fork is bigger on one of them - but I'm not sure which.
Also - does anyone know the ratios of the two different manual transmissions? I'm not sure if I've got the correct numbers.
My 1970 Honda Shop and Autobooks manuals shows:
2.529 1st
1.565 2nd
1.000 3rd
0.714 4th
My Honda Coupe manual (smaller white one) shows:
2.470 1st
1.565 2nd
0.967 3rd
0.675 4th
Besides counting teeth on gears, how can I tell them apart?
TIA,
Eric

[Steve]

On the non-synch trans' differential gear there is a line running the
full diameter on side of the gear. The tranny's with synchros are
easy to spt because of the 4 bronze synchronizers. All the USA sold
coupes have synchro.
Miles

[jpro8071]

Thanks Miles - that was the tip I needed. Turns out some parts lists are too old to include the synco trannie . . .

--- In
2cylinderhondas@yahoogroups.com
, "Miles Chappell" wrote:
> On the non-synch trans' differential gear there is a line running the
> full diameter on side of the gear. The tranny's with synchros are
> easy to spt because of the 4 bronze synchronizers. All the USA sold
> coupes have synchro.
> Miles
> --- In
2cylinderhondas@yahoogroups.com
, "jpro8071"
> wrote:
> > Okay - I'm about to get started on the 700cc high-compression
> engine for Bonneville (gee - three weeks . . . not much time!)
> > Have a transmission question - can anyone tell me how to
> differentiate the syncro vs. non-syncro trannie by looking at the
> internal parts?
> > I know that the one shifting fork is bigger on one of them - but
> I'm not sure which.
> > Also - does anyone know the ratios of the two different manual
> transmissions? I'm not sure if I've got the correct numbers.
> > My 1970 Honda Shop and Autobooks manuals shows:
> > 2.529 1st
> > 1.565 2nd
> > 1.000 3rd
> > 0.714 4th
> > My Honda Coupe manual (smaller white one) shows:
> > 2.470 1st
> > 1.565 2nd
> > 0.967 3rd
> > 0.675 4th
> > Besides counting teeth on gears, how can I tell them apart?
> > TIA,
> > Eric