Hard knocking on bottom floor while driving. What could it be?
Sep 14, 2014 at 5:00 PM
2003 Ford F-150 hard knocking noise
2003 FORD F-150
JRPATLAN
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Someone is going to have to crawl underneath and look. The typical suspects would be a broken engine mount or transmission mount allowing part of the exhaust system to hit the floor or frame. For decades only Chrysler used a front torsion bar suspension. When GM copied it, they had a problem where the rubber mounts for the cross member those bars attached to would separate and make a banging noise on bumpy roads. If Ford is doing it the same way, that's another good suspect. When those rubber isolators break, that is not really a safety issue, but it is irritating.
If you don't know how to inspect that cross member mount, have the truck inspected at a tire and alignment shop. The front suspension and steering systems should also be inspected at least annually on all Ford vehicles, and whenever you hear an unusual noise. Ford has more trouble with steering and suspension parts separating leading to loss of control and crashes than all other manufacturers combined. It's common for a part to break very soon after it starts making noise.
If you don't know how to inspect that cross member mount, have the truck inspected at a tire and alignment shop. The front suspension and steering systems should also be inspected at least annually on all Ford vehicles, and whenever you hear an unusual noise. Ford has more trouble with steering and suspension parts separating leading to loss of control and crashes than all other manufacturers combined. It's common for a part to break very soon after it starts making noise.
Sep 14, 2014 at 6:49 PM
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