Engine noise

Ford F-150 2007  100000 miles
Good afernoon, I own a Ford 150 fx4 2007 and recently I've changed both VCT (Variable Camshaft Timing), pinions and roller chains, a camshaft, spark plugs and coils. I have as well changed the oil but the engine is now giving off a sound at low revs, as if those chains were touching themselves.Even more, if I drive in reverse, the car usually starts trembling and, in order to stop it, I need to desaccelerate or stop it. No failure is provided by the computer, any ideas?
Ford from United States 9 years ago  
FO
1 report 
RANDALL from United States 9 years ago
The problem you are talking about corresponds to some chain failure.
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