* Tie Rod Ends: Worn tie rod ends are a common cause of knocking noises, especially during turning. They connect the steering linkage to the wheels and allow for movement. Wear causes play, resulting in knocking sounds. This is more likely to be a clunk rather than a light knock.
* Ball Joints: Similar to tie rod ends, worn ball joints (upper and lower control arms) allow excessive play in the suspension, leading to knocking, especially under load during turns. A worn ball joint will likely knock during both left and right turns, though it might be more pronounced on one side.
* Steering Gearbox: A problem within the steering gearbox itself (play in the gears or worn components) can produce knocking sounds, often more noticeable during turning. This is less likely to be a *slight* knock, often more of a clunk or groan.
* Idler Arm/Center Link: These components are part of the steering linkage. Wear can cause knocking, particularly during turning.
* Wheel Bearings: While typically associated with humming or rumbling, severely worn wheel bearings *can* sometimes manifest as a knocking sound, especially during turning.
* Loose Steering Components: Simply loose bolts or nuts in the steering linkage can cause knocking. This is a relatively easy fix.
* Suspension Bushings: Worn bushings in the suspension components can contribute to knocking noises, especially during turning.
Troubleshooting Steps:
1. Visual Inspection: Carefully inspect the steering linkage, suspension components (tie rod ends, ball joints, idler arm), and wheel bearings for any obvious signs of wear, damage, or looseness. Look for excessive play in any joints.
2. Jack Up the Truck (Safely): With the truck safely jacked up and supported on jack stands, grab each wheel and try to move it up and down and side to side. Excessive play indicates a problem. Similarly, try to move the tie rod ends and ball joints to check for play.
3. Listen Carefully: With someone turning the steering wheel, listen closely to pinpoint the location of the knock.
4. Professional Inspection: If you can't identify the source of the knock, take your truck to a qualified mechanic for a proper diagnosis. They have the tools and expertise to pinpoint the problem accurately.
Safety Note: Never work under a vehicle supported only by a jack. Always use jack stands for safety. If you're not comfortable performing these checks yourself, it's best to have a mechanic do it. Ignoring a knocking steering sound can lead to serious safety hazards.
