1994 Ford F-150 300 I6 5 Speed slight thumping/knocking when in motion?

All specs as above. 225,000 miles, just noticed today that when in gear there's a slight thumping or knocking sound. Seemed to get louder when I turned into my driveway. So I stopped, turned down my radio, and put it in first gear to try and figure it out. I moved forward and could hear the knock clearly, but by the time I can get out to look under the hood, it's gone. Oil pressure is normal, truck wasn't over heating but it was a tad bit warmer than normal (dead middle of the gauge) This is my daily driver so any suggestions would be a lifesaver.

Sounds like you had it in too high a gear for the speed you were going. My advice is turn down the radio so you can here what the engine is telling you to do.

You'll have to get it up on a lift & let pro nose around. Could be a broken sway bar link, loose exhaust pipe, stuff not hard ( expensive ) to fix.

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