To verify correct installation of a shifter assembly, the best practice is to:

Performing shifter calibration is crucial for verifying the correct installation of a shifter assembly. This process ensures that the shifter operates within its designed parameters and functions smoothly with the transmission. Calibration checks for proper alignment, responsiveness, and engagement levels, which are essential for the shifter to accurately communicate driver commands to the transmission.

While inspecting driveline components is important for overall vehicle performance, it does not specifically confirm the functionality of the shifter assembly itself. Checking the fluid level can be significant for ensuring proper operation of the transmission but does not directly relate to the installation verification of the shifter assembly. Replacing U-joints is also a maintenance task that pertains more to the driveline and does not impact the verification of the shifter installation. Focusing on calibration directly addresses the operation and functionality of the shifter, making it the best practice for this situation.