i ran my 6.4 with LSD and had no problems! no matter wht u get make sure it has a warranty
Krayz, I'd love the 2008 or newer 6.4, but I've heard not the best things about the 6.4. I love the way the truck looks and the power and torque, but I don't see many that fit my budget. What I'd really like is the '11 6.7! That thing looks like a monster, but I have quite a few more years of working and building the business before I can justify that kind of money.