National Auto Sales Sold a vehicle without front transfercase shaft Glassboro, New Jersey

On 8/28/12 I purchased a 2002 Durango so called 4x4 from national auto sales in glassboreo N.J, the test drive went great smooth turned on right transmission shift nice. Two weeks later I went over a large bump on the road from street repair and the transfer case turned on thats when I found out that the 4x4 was not woking I went to the dealer they sent me to there mechanic told me that they was gonna call by the time i called them the warranty exp. I dont have any proof that i told them in time. I no longer have the truck I stop paying on it.