1990 BMW 5 Series "vibrates 1400 rpm" Questions

...1400 AND 2000 RPM WITH CONVERTER Clutch ENGAGED DURING MEDIUM TO HEAVY THROTTLE CONDITIONS - VEHICLES WITH 7.3L DI TURBO ENGINE AND TRANSMISSION BUILT PRIOR TO 11/13/95 (5L13) ^TRANSMISSION - E40D - ...

200 series vibrating around 1400 - 1600 RPM. Any ideas of the problem. eliminated gear box, harmonic balancer, tyres, wheel bearings Will it vibrate in park or neutral? or going down the road?

1400 RPM. In gear driving or sitting and running up to RPM. Very noticeable. Seems to go away below and above RPM. Have your local auto parts store do a OBD scan to see if any codes are reported.. You