<VV> Corvair Fuel Mileage

[Tony Underwood]

At 08:02 PM 4/21/2011, BBRT wrote:
>Well,
>
>I think you can do it IF you are willing to weld up a new cluster gear to
>mate with the overdrive gear in the fourth gear postion. This presumes you
>can find the correct pair from a big car transmission. This may also require
>some mods to the input or clutch gear. This process is similar to making a
>Yenko Close Ratio or Double Close Ratio gear set.
>
>I would guess the best way would be to start with a set of three speed gears
>and cluster and change only one gear. I don't recall if reverse gear is in
>the same place (as a 4-spd) but I think it is. Howaever, you could chooose
>whatever gears you want in pairs, of course, to get the ratios you would
>like.
>
>Can it be done? Yes, I think so.




Yes it can.   Chrysler already did it three decades ago with the 
A833OD 4-speed gearbox.    What you end up with is a std 4-speed 
that's been converted into a 3-speed with an overdrive... with "3rd" 
gear being 1-1 and "4th" being overdriven.   You might be able to 
mix-match parts from 3/4-speed Saginaw gearboxes to pull this off, 
but there's gonna be welding and cutting and rehardening of some 
gears.   Shift forks and linkage might prove daunting unless you 
wanna put up with a funny shift pattern.   Chrysler made theirs work 
by flipping upside-down the shifter link/rod lever on the 3/4 speed 
fork shaft so the shift pattern remained correct.   A 'Vair gearbox 
might not be so easy.

Cubic money could make it happen...




tony..