My truck has started doing a vibration that is coming from the motor area (feel it through the break peddle and floor board) also I can hear it.

When it happens is when I am in gear (drive) and I come to a stop. While stopped it makes this vibration and noise until I put it in neutral or take off. If it is vibrating and I gas it the vibration comes to a sudden stop. Any thoughts??

04 f150 100k miles 4x4 thanks

 

Okay, clarify this for me (us)
In drive you do not notice it while travelling? Only when stopped and in drive (like a stop light)
It does not do it if you shifted the transmission in neutral? How about park?
How is the transmission shifting both between gears and forward/reverse/park?

 

Only when stopped in drive. Never happens while shifting etc. after I sit at a stop sign for a few seconds it starts

 

Maybe fan kicking on and it is going bad causing the vibration?

 

any check engine lights?, miss firing? motor mounts broken? rough idle?

 

Don't know if this is it, just throwing it out there. Check the fan blade. I was missing just a part of one blade and my truck shook like crazy, I mean you could feel it in the wheel and the hood went nuts when open. Of course I did'nt feel it when driving. I was shocked how that little piece missing could cause such vibration. Needless to say it went away after I replaced the blade. Not hard job at all. Could be something else though

 

How low is the idle when stopped in drive? When was the last tune up?

 

Vibrations are tricky to diagnose online. If I had to guess out of the blue, I would say it's engine related. The light load placed on the engine in drive can be enough to disrupt an engine with a pre existing issue. Give it a little throttle and it finds its rhythm again. That's just a guess.

If it were me I would do some basic things first, change every fluid/filter that hasn't been done recently. This is regular maintenance anyway. Then check some of the spots suggested by people on the forums. These guys have saved me a lot of money over the years and it's a great resource. If it is still a mystery and it were me, I would take it in and have a professional shop diagnose it for me. It usually costs half an hour labour but it's worth it in my mind if you have a tricky problem.
The shop I go to is great and the techs usually tell me exactly what to do when I go to do it myself. Nothing wrong with calling in the pros if you get stumped!

 

Don't forget to clean the throttle body and MAF sensor. Two HUGE things that can be world-changing as far as the truck is concerned.

 

Does anyone else here think maybe a bad motor mount? I had an older car do exactly the same thing. It drove me nuts chasing for a long time. I never found it, a shop did because visually, it looked fine.