Noise , vibration at 1,500 rpms

[cjbuckeye]

- noise just started this weekend....

I the vehicle is moving and accelerating , a noise that seems like a vibration occurs around 1,500 rpm’s. It goes away at cruising speeds / rpm. If I’m in park and rev it up it does not occurs. If I take off faster it don’t notice it, just normal acceleration i gear / feel it.

I bought it a year ago and have service record, transmission fluid service done 20,000 miles ago.

Anything I should check before having the mechanic I use take a look? Should I just try new tranny fluid?

2007 5.4 XLT 4x4 131,000 miles.

Thanks!!


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[expo dude]

cel? sounds like this could be a tune up situation bad plugs or a coil not firing correctly or a crack in the plug coil boot

 

[1955moose]

A electrical issue like tune up related will get worse at around 40mph or above, not 1500 rpm. Common problem on 6 speed Automatics is dirty fluid causing torque converter to misbehave. Do a codes check first, but it might be worth to do a drain or if not too high mileage, a flush of trans. 131k if never changed, you might try the trans fluid.

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[aagitch]

Can you tell where the noise is coming from? The rear or front? Maybe rear differential or universals?