[DML] Re: Automaitc Transmission Shifting

["David Teitelbaum" <jtrealty@xxxxxxxxxxxxx>]

It is a whole lot more complicated than that. Shift points are
affected by the final drive ratio which includes the tires and the
gear ratio in the final drive (and any losses which there are) the
ratios in the transmission, the distributer advance curve, and the
torque convertor. After all of the number crunching you will come up
with figures that you will have to road test to verify. If the thing
will be field-programable just try different shift points until you
come up with the "best" ones. Remember, the shift points shifting up
are NOT the same as the ones going down.
David Teitelbaum
vin 10757



--- In dmcnews@xxxxxxxxxxxxxxx, "Steve" <p2freak@...> wrote:
>
> Group,
> 
> Want to pick your brains here, especially the mechanical types.  
> 
> Suppose I have a field programmable transmission governor/computer.  
> Goal:  Want to get max acceleration (0-60 mph).  
> 
> What shift points do I set the computer to up shift?  2500 engine RPM,
> 2100 RPM?  Do I need to look at the RPM torque graph to figure this
out?  
> 
> On my Toyota automatic transmission, the shift point seems to be
> around 2500 to 3000 RPM.  How is it that with stick shift, the driver
> red lines engine before shifting (at least in Hollywood movies
anyway)?  
> 
> Thanks a bunch.
> 
> 
> Steve
> VIN#04421
>




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