Almost all 4 wheel drive passenger vehicles only have 2 wheel drive unless a locking differential has been installed on 1 or both axles. In slippery conditions, limited slip means that the wheel with the most traction will get the grip. It doesn't mean both wheels will still be driving. Posi-trac is GM's term for limited slip. So in slippery conditions when you really need the extra traction, you have one rear wheel driving and one front wheel driving. Tractors can have 3 wheel drive pretty easy if there is a differential lock for the rear axle. If you want true 4 wheel drive, get a skid steer loader. They have full power to all 4 wheels. If your bush hogging, you don't need front wheel assist. FWA is nice if you're going to be clearing snow or really need to work in sloppy conditions but for general work, there are millions of people that have got along fine with 2 wheel drive.
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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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