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Originally Posted by Peter R.
I have exactly the same problem, New 2004 4Runner with only 3900 miles. a vibration thrumbing noise, begins at 1500 rpms peaks at 2200 rpm then moderates but is always present as rpms increase.
On my vehicle maximum noise is at about 72/75 mph in 5th.
I have learned that apparently there is a problem with 2004 4Runners with the V8 engine and transmission.
Apparently a harmonic resonance develops within the transfer case, front drive shaft and the front differential. Some vehicles have it and apparently some dont.
At the moment I am told by the Toyota Tech specialists that there is no cure!!!!!
Otherwise I absolutely love this vehicle, but am looking at my options.
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I have a 2004 V8 4Runner that, from the getgo, had a mild high frequency vibration I felt in the steering wheel while accelerating, beginning at about 50 mph on up to 70 to 75. After about 1000 miles, because I had driven in deep water, I lubed the U-joints and sliders with AMSOIL synthetic molly. The vibration disappeared.
Stockerjo