Trans vibration or no?
What are the thoughts on a cause of minor vibration, more like elevated harmonics between 2800-3100 rpm, either driving or in park or neutral? 318 with 904. Seem like motor mounts, flywheel, flexplate, converter? Above 3100 rpm, I dont really seem to notice the vibration/harmonics near as much, and nothing below 2800 rpm. The transmission and converter seem to shift and operate great. Converter is stock 11, built up to yield 2600 rpm stall speed. Tran-go shift kit in transmission, with no external or add on cooler. 3.91 gears in rear.