HST Pedal Noise

[Halothane]

I bought a used B2650 last year. Everything works well, but when slightly engaging the HST pedal in forward or reverse it always has a high-pitched grinding noise that subsides when I press the pedal down more. It doesn't seem to affect the functioning of the tractor, it is just highly annoying--Doesn't sound like e fingers on a chalkboard, but along the same effect on my ears. When I'm doing a lot of back-and-forth work I have to wear noise cancelling earbuds.
Anybody aware of this problem, what causes it, and if there's a way to fix it?

 

[North Idaho Wolfman]

When was the last fluid or filter change?

 

[Halothane]

When was the last fluid or filter change?

Just had a full service at Kubota in February with full fluid/filter change. I told them to do an A-Z tuneup cause I had no service records when I purchased it. I assumed they would fix whatever was causing it, but nothing changed.

 

[Ogarret]

In my experiences with any hydro machine there is a pretty significant whine. I would not call it a grinding noise but it is annoying however completely normal.

 

[SRRGC1]

Hydro's will whine. Gear tractors will not or should not. You described a "grinding" noise. That is not normal.