What is low pitched vibrational sound when stopped in gear? It stops in N or P. on 2006 Toyota Tundra

When I put it in neutral or park the sound quits. It appears to be from transmission since it stops making vibrating sound. Any advice or solutions.

by in Henderson, NV on January 15, 2014
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1 answer 2 comments
ANSWER by , January 21, 2014
Possible motor or trans mont
COMMENT by , January 21, 2014
Thanks for reply. Found the problem. Bolt on skid plate missing. Enough to cause vibration.
COMMENT by , January 21, 2014