I have a 2004. 5 auto,4x4,3500,srw,sb. I need a autotrans what company's should I check out and do you have any experiance with that trans company. I have $10,000. 00 max for the trans. I was thinking billet with controller and I want to be able to apply a pacbrake or other type, must be able to handle 500-600 horse power.