I love the truck sequence.
I don't mind the mine car sequence, but its full of too many goofy gags and plays off of too many special effect model sots. I like Indy to stick with pure stunt action.
I absolutely love the tank sequence. The stunt of vic jumping on the tank alone is far more jaw dropping than anything the mine car chase produced.
Its a close one between the truck chase and the tank chase, i'll go with the tank chase.