Can someone help me with a problem I have with my 94 F150 4x4? When ever I tow my camper or my boat the truck shakes really bad. Its ok If I'm not towing is this something with the tranny or drive shaft?

 

I have the same issue, it's not all the time. But sometimes when I come to a stop it shakes and feels like it's not getting fuel. If I shut it off and start it back up its fine, but it only does this when I'm towing.