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2004 GMC Sonoma SLS Crew Cab 123 WB 4WD

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4-Wheel Drive, Crew Cab 4.7' Fleetside SLS
15 mpg city / 19 mpg hwy

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December 6, 2009, 5:36 pm

J H

Question: Transmission Problem: 2003 GMC Sonma. Vibrations at certain speeds.

Transmission Problem: 2003 GMC Sonma. Automatic. 140000 mi.?
Vibrations at 35-40 mph. Worse at 45-50 mph. And even more worse at 55-60. Different harmonics to the tone of the vibrations. If I put it in neutral, the vibrations stop. Seems to be transmission not engine.

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