Proactive maintenance for towing 2015 diesel pickup transmission, turbo, cooling

[Alexander.L]

I own a 2015 diesel pickup that I use for towing a medium-sized travel trailer, and I'm trying to establish a more proactive maintenance schedule beyond the basic oil changes to ensure reliability. I'm particularly concerned about the long-term health of the transmission and turbocharger given the extra strain from towing. For other owners who regularly tow with their trucks, what specific fluid intervals, inspections, or preventative measures do you prioritize for the drivetrain and cooling systems, and have you found any aftermarket gauges or monitors essential for keeping an eye on temperatures and pressures under load?