Super 90 whine

I have a good looking and nice engine running Super 90. Right now the PTO does not work and it has a whine sound when running in 3rd and 4th gears especially. Any ideas on what the problem may be. I am sure it is a bearing or a couple of gears but I am unfamiliar with the rear end of this tractor. Curious with approximate cost to repair and parts availability. Any thoughts?
 
Have you checked for oil in the rear axle housings. There is a oil filler plug on each axle housing, near the outside, under the fenders.
Wayne
 
Oil should come out the plug, to be full. I would suspect that your axle bearings are bad. Would help if you can pinpoint where the whine is coming from. Do you have the differential lock on your 90?
Wayne
 
Yes, I put about a quart in and the hose plugged the hole and oil was coming out when I put the plug back in. The noise is coming from the left side. Axle bearings is probably a good bet. The gears all shift easily.
 
Is your 90 a high clearance, or the standard type?
You should contact me through my E-mail....bottom right classic view.
Wayne
 

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