The steering shaft universal joints in your 2019 Chrysler 300 allow the steering column to connect to the steering gear at angles while transmitting your steering input. Worn u-joints create clunking, loose steering feel, and can eventually affect steering precision.
Steering Shaft U-Joint Function
Universal joints in the steering shaft allow angular connection between the steering column and rack while transmitting rotation. The 300 uses intermediate shafts with u-joints to navigate around the firewall and other components.
Symptoms of Worn U-Joints
Worn u-joints produce clunking sounds when reversing steering direction, play or looseness felt at the steering wheel, and sometimes a notchy feel as the joint moves through its range. Symptoms typically worsen over time.
Causes of Wear
U-joints wear from normal use, lack of lubrication (many modern joints are sealed), road contamination, and age. Some vehicles have experienced accelerated wear from design or manufacturing issues.
Inspection Method
Access the intermediate shaft under the dash or hood. Have a helper turn the steering wheel slightly back and forth while you observe the u-joints. Worn joints show visible movement at the joint while the connected shafts move together.
Repair Options
Some vehicles allow u-joint replacement; others require complete shaft assembly replacement. Updated shaft designs may be available that address wear issues from the original design.
Code C0073 Context
Code C0073 relates to vehicle speed signal issues. While not directly a u-joint code, severe steering system wear may trigger related faults or affect system behavior.