you are probly right. the owner i got the car off of said he just put a brand new set of 4.10 in the car right before i bought it. but he said he thought he set them up wrong so gave me a brandnew set to put in it.which i was going to do but ran out of time.i found a truck dana 60 i am going to get and while i am saving up the money to build it up for my dart.i am going to have my new gears set up and give it a try again next year.thanks Mopar65