The 6R140 in F53 and F550 is fundamentally the same transmission. Physical parts interchange. Differences are in electronic calibration and torque converter selection for each application. For repairs or replacement, they are compatible.
Ford F53 left and right speed sensors use the same sensor element with different harness lengths. You can use the cheaper right-side part and extend the wiring to fit the left side. Save significant money on this common repair.
Connect the red stoplight wire from your Tekonsha brake controller to the stoplight fuse output at the fuse box, not directly to the brake pedal switch, to avoid the ground-switching issue that can damage your controller.