2013 328I convertible shudders when accelerating

[Jbduffy1]

Car has 69000 miles. I drive to golf alone and I get a shuddering when accelerating.(Not hard accelerating) Normally my foot is off the gas and I start to speed up. But when the car has two people and a full tank the shuddering in sever. As soon as I take my foot off the gas and the vibrating stops. Only when I am local driving and the car is heavy is when it is bad. Feels like transmission is slipping? First I thought it was the road…but dont think so.

Any Ideas? Not tire imbalance….

[hakentt]

Driveshaft flex disk worn, carrier bearing, U joint. One of those