ASE G1 Auto Maintenance and Light RepairSuspension and SteeringMedium
A technician is inspecting the steering system of a light truck. They note that the steering gearbox has significant play when the steering wheel is turned back and forth slightly, but the pitman arm and idler arm connections are tight. What is the most likely cause of this steering play?
- ALoose steering column U-joints
- BExcessive internal play in the steering gearbox
- CWorn ball joints
- DWorn tie rod ends
Show answer & explanationAnswer & explanation
Correct answer: B. Excessive internal play in the steering gearbox
If there is significant play at the steering gearbox input (turning the steering wheel) but the output connections (pitman arm, idler arm) are tight, the play must be internal to the gearbox itself. This indicates excessive wear within the gearbox, such as worn gears or bearings.
Why the other options are wrong
- A. Loose steering column U-joints would cause play between the steering wheel and the gearbox input shaft, but the question implies play at the gearbox itself when the steering wheel is turned.
- C. Worn ball joints cause play in the suspension, not typically directly in the steering gearbox assembly.
- D. Worn tie rod ends would cause play at the wheels, not necessarily directly at the gearbox input when the pitman/idler arms are tight.
Steering Gearbox Internal Play
Play detected at the steering gearbox, with tight external connections, indicates internal wear or excessive lash within the steering gearbox itself.
- Play between input and output.
- External linkages are tight.
- Requires gearbox adjustment or replacement.
Memory trick: Gearbox Play, No Other Way, If Pitman's Tight, Gearbox's Plight.