Below is the press-release from Deere on their new AutoHST system for the 35/3720, I have also attached a few pics. from the article...
AutoHST - New transmission option for 3520 and 3720 Compact Utility Tractors
John Deere is proud to announce a new transmission option for the 3520 and 3720 Compact Utility Tractors. With controls resembling those of an automobile, AutoHST makes getting work done as easy as taking a drive in the country.
AutoHST is designed to resemble an automotive-type control system. When the operator sits in the seat, he or she will feel right at home; the controls resemble those of a car.
Automotive-like features:
Lever on the left for Drive-Neutral-Reverse to engage the transmission
Single "go pedal" on the right to go forward or backward
Single brake on the right, like the brake in a car
Beyond this simple layout, AutoHST has all of the features that eHydro provides such
AutoHST - New transmission option for 3520 and 3720 Compact Utility Tractors
John Deere is proud to announce a new transmission option for the 3520 and 3720 Compact Utility Tractors. With controls resembling those of an automobile, AutoHST makes getting work done as easy as taking a drive in the country.
AutoHST is designed to resemble an automotive-type control system. When the operator sits in the seat, he or she will feel right at home; the controls resemble those of a car.
Automotive-like features:
Lever on the left for Drive-Neutral-Reverse to engage the transmission
Single "go pedal" on the right to go forward or backward
Single brake on the right, like the brake in a car
Beyond this simple layout, AutoHST has all of the features that eHydro provides such