Re: T-34 And how it gets OD

[IHMagellan@domain.elided]

Well, Allan, here's your enlightenment.  You're right.  The input and output
can't spin at different speeds without spinning the countershaft.  Also,
transmission component inertia has nothing to do with interstate driving
because everything is spinning at a constant speed.  Gear inertia does come
into play in town.

Here's my opinion:  The biggest gains in transmission efficiency for steady
speed driving have come from improvements in lubrication.  Modern
transmissions use less viscous lubricants than the old ones.  This results in
a huge reduction in drag and the faster you spin the transmission, the bigger
the effect is.

Jerry Muncie

In a message dated 1/21/99 11:10:14 PM US Eastern Standard Time,
allanw@domain.elided writes:

<< I've been thinking about this...how can ANY transmission turn the output
 faster than the input shaft (aka 'overdrive') WITHOUT passing the torque
 through some type of countershaft?  Further, what's inertia got to do with
 it
 when I'm tooling down the freeway at a steady 65 MPH?  Admittedly,
 the massive size of the gears/shafts makes for spinning some serious
 weight, but hey, we're not talking about some Geo Metro tranny here.
 Anyone familiar with the popular NV-4500?  Does it work any differently?
 Anxiously awaiting enlightenment...
 
 Allan Weidenheimer
 72 1210 Pickup
  >>