The John Deere 6603 transmission listing shows 24F/24R gears, 24-speed, and 12-speed. Top travel speed is 24.9 mph forward and 18.6 mph reverse. Transmission options include AutoPowr, IVT, CommandQuad Plus, CommandQuad, AutoQuad, and PowrQuad.
Forward/reverse gears24F/24R
Forward speed40 km/h
Reverse speed30 km/h
Transmission optionsAutoPowr, IVT, CommandQuad Plus, CommandQuad + 3 more
For the John Deere 6603, the main transmission numbers captured here are 24F/24R forward/reverse gears and 24-speed and 12-speed transmission figures. These are the specs buyers usually compare first because they show the usable gearing range
Speed note
The John Deere 6603 speed data lists 24.9 mph forward and 18.6 mph reverse. Reverse speed is lower than forward speed in the captured data
Options note
Transmission options captured for the John Deere 6603 include AutoPowr, IVT, CommandQuad Plus, CommandQuad, AutoQuad, PowrQuad, PowerReverser. The long option list usually means this model family had multiple transmission packages across trims, years or markets
Reverser note
The John Deere 6603 listing includes PowerReverser. That is a useful buyer detail for loader work, shuttling and frequent forward/reverse direction changes
Official information note
Mistakes do happen. Transmission specs can change by year, trim, region, tire size and option package. Please check the operator manual, build sheet and official deere.com website for official information.
