650j right track locking down

Trying to do some final grades An when steering the right side seems to lock down here an there ,have to go opposite directions of what ya was doing in order for it to move An then it may run few inches An lock down again, Don’t hear any roaring noises that may lean towards a final drive, guess need to hook gauges into test ports an see if pressure drops on that side. Anyone know what pressure I should see An when. Thx

650j right track locking down