hey guys, i have a 99 caravan with a 3.0 engine. so heres what happend to me, while i was doing about 30-40 kms the van just jerked back and forward and almost stopped but i gave it some gas just to turn in to a gas station and stop but as i gave it gas a weird whinning/grinding sound came up all the way to the gas station about 40 feet away and now it wont move it just makes a weird whining sound when i put it in drive an sometimes in neutral but sometimes it will go in reverse but the wheels will lock after about 3 feet in reverse, what can it be? i checked fluid and its good with no metal peices and it doesnt smell burned, help me oue pleaseeee