HST ? improved over the years

[dfkrug]

Dave, My understanding is that the cylinder block rotates both in case of hyd motor and pump. swash plate angle can be either fixed or variable. Do you disagree with that?

Yes, this is what I stated in post #39 above.

When trying to communicate and understand anything technical, it is
important to understand and agree to the jargon used. Sometimes definitions
are needed as part of the discussion; sometimes we rely on established
unspoken definitons.

On the subject of jerky HST control, all of the HSTs I have operated
have some sort of damper on the GO pedal or pedals. The older tractors
I owned with HST were a bit jerky, more so in higher ranges. This was
due, at least in part, to a worn damper. My new machines have all been
very smooth, and they are not even the more sophisticated HST-plus
or eHydro, or other newer generation HST.