Get that axle seal replaced asap..Same as i originally suspected curse of the autos, hard shifts in the morning till you ride it off, best bet is to let it warm up beforehand maybe 5 minutes just to get the valves lubed and working efficiently..the low fluid from the axle leaking would definately cause jerking etc if the tranny gets low and the oil gets overworked..idk about the "engine acting up" he mentioned but i do know that from experience you let it warm up or it will be jumpy/jerky and shift harder because its still cold
with a bad mount you can feel it in the steering wheel its pretty evident if its bad, my steering wheel is dead still when my engine runs i can barely feel any vibration
and depends how much you wanna pay right now, my rule of thumb is "quickest and cheapest first" something simple can be a easy fix before swapping the entire engine/tranny imagine labor on that swap compared to an axle seal and top off+mount
