1996 Dodge Caravan WHOBBLE

MY 1996 CARAVAN HAS A WHOBBLE AT SLOW SPEEDS OR WHEN YOU FIRST ACCELERATE. REPLACED LEFT AXLE WAS FINE FOR A YEAR UNTILL i TOWED A 4X8 UHAUL TRAILER. pUT ANOTHER AXLE, STILL DOING IT. wOULD A TRANSMISSION MOUNT CAUSE IT. HOW CAN i CHECK THE TRANS MOUNT? WHAT ABOUT THE BEARINGS IN THE TRANAXLE?

THANK YOU
ROMMEL