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Re: [FlyRotary] Fw: [FlyRotary] Re: Dodge vs Ford
Ken,
Thanks for that info:
62/28 = 2.21+1 =3.21 - your correct, yet
again!
Sun gear 28 against 42 that's
interesting, 1.5 times the size teeth, that does make it
stronger.
Point taken on the planet gear speed as
well.
I think the bigger teeth will give less contact
area, but the greater load transfer is compensated with the increased sized
teeth.
Thanks Ken - I hope I helped eliminate the
confusion!
George
The tooth count for the dodge is 62 on
ring 28 on the sun and 17 on the planets.
Comparing the C-6 gears that are used in the
2.17 and 3.17 ratio to the Dodge 3.21 ratio the Dodge gears have much bigger
teeth, the sun gears are the same outside diameter but the C-6 has teeth and
the Dodge has 28 teeth, this is do to the larger teeth on the
Dodge.
Also the ring gears have the same inside
diameter but the C-6 has 74 teeth and the dodge has 62 teeth do to the larger
teeth on the Dodge.
The surface speed remains about the same but
the teeth are bigger, sounds stronger to me.
I have built off road race car transmissions
for years and although manual not stick and always the gears with bigger teeth
were always stronger.
Another thing that I noticed when I was
looking at gears at the tranny shop is that the C-6 set that gives 2.85 ratio
has a bigger sun gear and the planet gears were real small do to the larger
sun gear so that would raise the planet gear rpm.
Here is a shot of both gears side by side, its
clear to see the difference.
Ken Welter
Ken,
Some
additional info!
I look at the
planetary as I look at a external toothed gear engaged to a drive
gear.
The smaller
drive gear has to travel ( with the E4D) 2.85 times further
than the larger gear ( the larger gear has 2.85 times additional
teeth).
The planetary gears
( in my mind ) merely transfers the loads. Their not involved with varying
the Ratio!
No matter how it's
used in a Vehicle/ Truck, we will use it the same as we use the other
planetaries, so the assessment is the same as the other
planetaries.
So I'm figuring
that the ring gear must be about 84 for the ring gear and about 38 for the
sun gear e.g. 84/ 38 = 2.21 +1 =3.21
If you can give me
the tooth count we can evaluate from there - no pressure and no
confusion.
George ( down
under)
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)
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