i am sorry to hear, that. i hope you can get it fixed, but my dad is a mechanic and 4300 sounds really high even for a new front end, if it a a rear wheel drive only, then it shouldnt be that much, even if its a 4x4 that sounds expensive, a new front straight axle and gears should probaly be atleast 1000 less, but if its is a IFS front end i dont know what they run, but i would get another quote or something.