I just got a TC45DA this spring and it behaves the same way however, I think it’s just the nature of the hydrostatic drive.
At first this concerned me since my old gear drive IH 424 didn’t behave like this at all unless in too high of a gear.
One thing I do wonder about is what the hydraulic pressure is in my tractor.
Does anyone know what the specification is for hydraulic pressure on the TC series tractors?