Re: 3 speed auto transmissions
The issue is gear ratio spread with a single, simple planetary set.
Using VERY ROUGH calculations with a 70 tooth sun and 100 tooth ring gives the following:
Low gear= 2.43:1
Second gear = 1.0:1
High Gear = 0.59:1
These are pretty unrealistic gear ratios for a small block chevy as a three speed. But it was a good thought experiment.
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