What is a John Deere synchro transmission?
The standard Synchro Shuttle transmission is a fully synchronized 4 forward /4 reverse speed electrohydraulic shuttle reverser transmission with permanent 4-wheel drive. It has the traditional “H” pattern gear sequence and was designed to provide smooth shiftability and modulation for shuttling.
How does a direct drive transmission work?
How direct drive works. With direct drive, a shift control works along with the clutches, maintaining an optimum connection. Two input countershafts permit the system to function, and they’re managed directly by a motor within the gearbox that regulates the shifting.
What is the difference between direct drive and overdrive?
When talking of the speed, drive means going in a slow pace where as overdrive means going in high speed. Drive means more power and more gas. On the other hand, overdrive means less power and less gas. When talking of fuel economy, overdrive has an added advantage to that of drive.
What is a Syncro range transmission?
These transmissions have four ranges with two forward gears in each range. Each of the two lower ranges also have a reverse. The “syncro” part of it is that shifts within the ranges (1-3, 2-5, 4-7, and 6-8) have synchronizers that allow on-the-go shifting. However, you do have to use the clutch.
Is 4th gear direct drive?
The direct drive gear (4th gear in the image above) is the gear which connects the input shaft directly to the output shaft, without going through a gear mesh.
Can you drive on the freeway with overdrive off?
It’s not bad to drive with overdrive off and does no harm to the transmission. However, you will get worse fuel economy and have more noise at high speeds. There’s really no reason to leave it off unless you need to ascend or descend a steep hill. You can turn overdrive on or off at any time or speed.