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When driving down the road, there is a constant "thud thud thud" coming from the front driver's side of my 99 Ranger. I've been looking online for about two hours now, going back and forth to my truck to see if I can figure out the problem. All I've come up with is that it's the sway bar links. they're both disconnected, and I'm going to replace them anyway, but would that cause the constant thudding? Any help is much appreciated, thank you!
Let me also ask is this a "sound" thud or a "feeling" thud or both?
Something obvious like loosened up lug nuts would sound like what you are saying. I would personally not drive it until you have done some inspections to make sure there is not something bad getting ready to happen and then severely limit its use until you get is straight.