> > > >George Lendich wrote:

 > > >>
 > > >>  Thanks Ken,
 > > >>
 > > >>   I am now fully versed in the planetary i.e. ring gear divided by
 sun gear
 > > >>  (+1 for same direction turning).
 > > >>  Or RING gear (78 teeth) divided by SUN gear (42 teeth) = 1.85
 > > >>
 > > >>  I can't see how the hell Ross could have got 1.7 out of that matey -
 however
 > > >>  I don't have the overdrive planetary to check to see if it's this
 one.
 > > >>
 > > >>  Has anybody got the overdrive so that they can give us an answer on
 that one
 > > >>  ?
 > > >>  In the mean time I will ask my contact at Slausons!
 > > >>
 > > >>  BTW the answer to your last question on the pressed metal for the
 Housing is
 > > >>  yes!! However I could be wrong it's either pressed or a very
 accurate
 > > >>  pressure cast.
 > > >>  George (down under)
 > > >
 > >     HI George
 >
 > >    I just checked and the 3.17 in the same direction rotation is has
 > > 74 ring and a 34 sun and this is the same gear set as the 2.17 in the
 > > opposite direction rotation so dividing 34 into 74 gives you the 2.17
 > > ratio now how do you calculate out the 3.17 ? I just spun them around
 > > and counted the revolutions.
 > >   Also I was told that the ring gear on the 2.17 and 2.85 are the same
 > > and can be interchanged, are you sure on the 78 tooth count on the
 > > 2.85 ?
 > >   It could be that the Ross 1.7 wasn't even a C-6 base as I have never
 seen one.
 > >
 > >   Ken Welter

 Ken,
 See my previous message (Ring gear divided by Sun gear +1) for same
 direction rotation of the Sun gear i.e. (74 divided by 34) = 2.17 +1= 3.17.
 Also (78 /42) =1.85+1= 2.85

 The 2.17 turns in the opposite direction.
 The 3.17 turns in the same direction
 The 1.85 turns in the opposite direction
 The 2.85 turns in the same direction

 Just a simple well documented engineering rule which you can check on the
 Internet.

 I am also SURE on the teeth count and the ring gears are not the same NOR
 are they interchangeable (I've checked).

 One planetary is driven by the big end of the sun gear and the other
 planetary is driven by the smaller end of the Sun gear

 Both planetaries are different with the 2.17 having bigger planets and more
 teeth.

 Both units are very well made.

 To be sure, Ross could have used a GMH planetary, but more likely he got
 confused with the ratio, unless he used the Overdrive, which I'm unsure of.

 Don't tell me I've got to buy that one as well !!!
 George

   Thank George

   I probably had brain fade and it is actually the 1.85 that Ross offered.
  I was just talking to a friend that works on transmissions and he
said that the 78 x 42 gear set came from the E40D transmission so
they are not interchangeable.

  Ken

 
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