Toro Super Recyler 20383 pulls to left side.

I have a 2017 Toro Super Recycler 20383 that stopped self-propelling, and not long after the belt came off and out as I was mowing. The dealer replaced the belt at no cost, however the mower now pulls to the left, especially noted when on an upgrade. Are there any adjustments that can be made to eliminate this?

https://manuals.toro.com/126731/index.html?rnd=0.04428027109757737

lubricate the wheel gears see figure 43 in manual, let us know if this helps, thanks, Mark