I have an issue with my 850 and vibration. The tractor runs great when I use the low range selection. I get a decent vibration when I use the high gear range . When i push the clutch in the vibration goes away. I replaced the belt idler today and it made no difference. The belts have only been installed for a couple of months.
What have you guys seen out there in field with regards to high speed range vibration of the drive shaft?
I am getting a really awesome foot massage from the foot rests so my guess the cause of the vibration is mid tractor. If it was the gear box bearing I would assume i would feel the vibration in the seat. I had opened up the gear box over the winter and drained and replaced the gear oil and it was pristine back there. no damaged gears or bronze flakes at the bottom of the sump.