Tag Archives: wheel bearing

A groan on slow turns is a dry or loaded joint complaining in the front suspension. On strut-equipped cars like the Camry and Accord the strut mount bearing turns with the wheel and groans when its grease is gone; on trucks and SUVs the sound more often comes from the steering joints, the ball joints or dry sway-bar bushings as the front end loads up at low speed. The noise is usually worse in a parking lot, where the tires scrub and the joints work hardest with almost no road speed to mask them. Because the groan is a dry-friction noise rather than a clunk, it often quiets for a while after lubrication or fresh parts — and that short window is the diagnostic clue. On Grand Cherokee and Tahoe front ends the groan often lives in the sway-bar bushings and the steering stops, which dry out and bind under the load of a slow turn.

A 4Runner that wanders down the road — drifting, darting over ruts and needing constant corrections — is a front end with play or an alignment that has moved. The 4Runner steers through a hydraulic rack-and-pinion system, so the usual suspects are the tie rod ends, the rack mounts, the ball joints and the tires themselves. The idler arm belongs to parallelogram steering fronts found on older full-size GM SUVs like the Tahoe and Suburban, where the idler arm and pitman arm hold the linkage; on the 4Runner the equivalent slack shows up at the rack and tie rod ends instead. Reading the combination of wander, steering play and tire wear names the part before any money is spent. The same combination shows on a Tahoe or Suburban with a parallelogram front end, where a worn idler arm adds the same dead feel at the wheel.