four wheel drive not working · all wheel drive light stays off
Selecting 4WD or engaging AWD mode fails to actually shift power to the extra wheels, or the indicator light does not confirm engagement.
Check the transfer case fluid level if accessible - it is a relatively simple and common cause worth ruling out first.
Safe to drive in 2WD in normal conditions, but avoid relying on 4WD/AWD for slippery or off-road conditions until it is fixed.
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Descriptions are for guidance only and do not replace a workshop inspection. If you are ever unsure whether it is safe to keep driving, pull over in a safe spot.
Clunk when shifting from park into drive or reverse
InfoA single clunk or thud sound is heard from underneath the car specifically when shifting out of park into drive or reverse.
Vibration only when accelerating or towing, not when coasting
WarningA vibration appears specifically when accelerating or under load (towing, climbing), but disappears when coasting or maintaining steady speed.
Whining noise from the differential
WarningA whining or howling noise coming from the differential (front, rear, or center on AWD cars), changing pitch with vehicle speed.
Grinding noise when braking
SeriousA harsh, metallic grinding or scraping sound that happens specifically when you press the brake pedal, often worse at low speed.
