Do Hydrostatic tranny's have "gear ratios"?

[bczoom]

On another forum, someone asked the "gear ratio" on a vehicle with a hydrostatic transmission.

I've never heard of gear ratios in this type of tranny.

 

[Mith]

Well I guess you could compare the input (engine) rpm and the output (wheel) rpm with the transmission at full speed to give a gear ratio.
Ofcourse the main benefit of a hydro is that it is infinitely variable from 0 to that ratio between input and output rpm at full speed.

if you have a hydro with several gear ranges the gear ratio between the input and output rpm will be different in different ranges

 

[Av8r3400]

It could be the person was referring to the gear ratio between the drive motor and the wheel. I have never seen a hydro drive directly bolted to a wheel flange without some sort of gear reduction.

 

[Doc]

Good question. My Hydro has L, M & H. Different speeds depending on which range I'm in. So, though it is different than a standard tranny it sure appears to me that they have gear ratios.