Twice the oil and line pressure to move in reverse? Double gearing? No, that's not how it works. Line pressure is regulated by varying the displacement of the hydraulic pump as commanded by the PCM. Line pressure raises with torque request.(how far you push gas pedal) Forward or reverse, it's simply a matter of which combination of clutches are commanded on and off. That said, check the parking brakes. Cold moist air can make brakes grabby. If the park brake is not fully released and is dragging a bit, it can do exactly what you're describing. The filter in a transmission is large enough to hold all of the friction material and not plug. If the trans filter were plugged, it would be slipping bad, fluid would be black.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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