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[FlyRotary] Re: Dodge vs Ford
Ken,
The ratio is ring gear tooth (numbers) divided
by sun gear teeth( numbers).
If drive is taken out of the planet (turning
RH) = A divided by B = 2.21+ 1 = 3.21
If drive is taken out of the ring gear ( turning
LH) = A divided by B = 3.21
EG the E4D is 78 toothed Ring gear divided by the
42 toothed sun gear =1.85:1+1 = 2.85:1
and the 2.17 is a LH turning planetary
with ring gear held can't remember the tooth count.
It doesn't matter 'what drives what' in the Truck -
just count the teeth.
George ( down under)
Ok I was wrong on that one, on the trucks the sun gear
is held solid to the case, the power is put into the planet and the power is
taken off the ring gear, now what the hell ratio that works out to be I don't
know as I am confused.
I would
like to add that in the truck the planet is held solid to the case, the
power in is put into the sun gear and the power out is taken from the ring
gear so the ratio comes out to 2.21 rather than 3.21 as I am using
it.
The Dodge
overdrive is is a 3.21 and it comes from a 518 and 618 transmission, is that
the gear use you were asking about ??
Ken
I am not familiar with the Dodge
transmission but an overdrive gear with a ratio of 3.17 : 1 is
astounding! Every other OD gear I've come across has a ratio
something like .707 to 1. Are you sure about that gear's
use? I'm always up for learning a new wrinkle.
Tracy
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