Just started to pull away from a stop in 1st and

most likely blown rear drain fluid and inspect the gears/pinion

05 Chrysler pacifica is a 4 speed automatic, next time buy a car with a 5 speed automatic

Park it! You need to check fluid level and condition, before you do real damage.

If you put it 2 wheel drive will it drive. If it does then it's the transfer if
not then transmission problems.

hi mate , sounds like the SPIGOT bearing its a little bearing that allows the gearbox to be at a different seed than the engine flywheel and if this is in bad condition it will take the gearbox front shaft to a higher speed than comfortable for gearshift , in the meantime when you go for 1st or reverse gear just engage a gear like 4th without taking your foot off the clutch and then go for 1st or reverse, this will stop the gearbox spining long enough for a smooth shif, oNLY USE THIS METHOD WHILE STaTIONARY and see a professional when you get time.

may be the gears in the rear end or check your motor mounts, ive had the noise and it was motor mounts

have the rear chunk and front chunk checked out could have slack in gears.

GO WITH THE CHEAP FIX FIRST CHANGE THE INPUT , OUTPUT SOLENOID AT ONLY $30 A PIECE AT YOU LOCAL AUTOPART IF IT DOESNT WORK CHANGE THE SOLENOID PACK , AT $ 125 AT YOUR LOCAL AUTIPART
LAST FIX IS THE COMPUTER LOCATED UNDER THE SPLASH GUARD AT THE DRIVER FRONT WEEL
YOU CAN GET IT REBUILD FOR $150 BUCKS

your clutch pedal has broken easy fix