Steve,
Just my two pence worth.
As far as I'm concerned , final drive and rear axle are the same
thing....so a car has only one final drive ratio .
If the car has a four speed gearbox , plus reverse , with overdrive
on three forward gears , then the car has eight "overall ratios".
Cheers,
Mike....on the east side of the pond .
http://mikek.9online.fr/index.htm
> Calculating the ratios including an
> overdrive is simply a matter of multiplying all the ratios together
> to establish a final ratio per gear.
>
>
> Jonmac,
> Thanks for the great response. I'm in agreement with your take on the
> terminology. Final ratio is the product of the transmission gear ratio
> times the rear axle ratio. They're only the same when applied to a
> 1:1 transmssion gear. What's so confusing is the use of the term
> "Final Ratio" to mean the rear axle alone.
>
> Regards,
>
> Steve
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