Quote:
Originally Posted by Beezer1
...shakes between 1500-1900 rpm with light to moderate throttle. Especially noticeable when climbing hills on interstates. If using the cruise control, a manual downshift (raising rpm above 2000) immediately stops the shake...
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Quote:
Originally Posted by Beezer1
...By selecting gears manually, I can cause the shaking at different speeds, but always between about 1500-1900 rpm..
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If the shake/vibration is varying with engine RPM as opposed to road speed, this sounds more likely to be a crankshaft or torque convertor related problem.