95 Caravan CV noise?

I have a 95 Dodge Caravan with 124K miles. I had to replace the transmission about a month ago. It was replaced with a transmission from 94 Le Baron with 48K miles. Since then every time I take off there is a " Clunk or Snap " noise from the front end, some times it comes from right and some times from left. There is no noise while driving, only when moving from a stop. The transmission is fine and van runs great, but this sound scares me. Does anyone have any clues what could be causing this? Thanks for any help.

Ask the shop to recheck the engine cradle mounting bolts--also the engine/trans mounts.