Oh, so that's a hydro machine?
Steering EPA limits how much it opens the block at full stick.
Expo lets you reduce the stick sensitivity around center-point so you can crack the block open more precisely. Start somewhere between a Lot and All of the expo. Then tighten up end points as needed.
https://youtu.be/qunXBFlG1Hk
Slow down your hydro pumps esc channel with tighter epa.
Lower the working pressure with the bypass valve
Maybe use some Channel Mix so that the Scoop and Curl channels can kick the pump speed higher when moving those, then when those sticks center drop pump back slower for drive functions
Or if you're really feeling old school and just don't like making radio adjustments, make some Restrictor plates or 'slow-down' blocks that will limit speed of fluid volume transfer to steering rams.
Also with articulated stuff there's a lot of unlearning how to turn. It's really unnatural feeling to slowly turn in, then set the stick neutral while machine moves through the turn, then counter steer the turn to straighten back out. It makes sence doing that with Drifting a car, but feels wrong on a big lumbering machine that's all Grip
Be sure to let us know how it's doing next year