when car is in drive it starts shaking and vibrating

UNFORTUNATLY YOU DO NOT HAVE ENOUGH INFO TO DIAG. THIS WAY,HOWEVER THE FIRST THING I WOULD CHECK IS YOUR CATALITIC CONVERTER. A PARTIAL BLOCKAGE CAN START WITH SIMALAR SYMPTOMS. THE ACT OF REVING UP THE RPM WHILE THE ENGINE IS NOT UNDER A LOAD CAN BLOW OUT SMALL PARTICALS THUS ELIMINATING SOME OF THE BLOCKAGE TEMPORARALY. GOOD LUCK. DAN www.mastermobilemechanics.com