Hey all, I am having a problem with a 420 backhoe, serial number FDP26934. It moves fine until I turn the 4 wheel drive on. When it's in 4 wheel drive all the wheels lock up and it won't move. I picked all the wheels off of the ground and in 2wd the rear wheels spin and the front spin but can be stopped by hand. I cam spin all the wheels by hand in 2wd. In 4wd none of the wheels will spin. Any ideas is appreciated.
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