2:1 Internal & Spur Gear

[Tom Sharpe]

Dan Llewellyn2 wrote:

> This is not exactly EFI related - but my local sources have
> been unable to help me.
>
> I am trying to build an experimental transmission.  It uses
> an internal gear (teeth on the inside) and a spur gear (teeth
> on the outside) that rotates inside the first gear.  My only
> requirement is that the internal gear needs to have exactly
> twice the teeth of the spur gear (and mesh, of course).
>
> I went some automatic transmission shops, but all the sets
> of internal and planetary gears won't work because the planets
> are too small.  I was hoping internal and planets from different
> sets might work,  but haven't found a match.  I figured that
> buying some used automatic transmission gears would be
> the cheapest way to get some quality gears.

You can get 1.82/1 planetaries from Powerglides. (or a Lenco)  Tom