I know this is the gas 40 area of Mud but I have a question regarding Birfields and a BJ40. I am still looking around at lift options (I havent found anyone in Costa Rica that does a SOA properly ie: cut and turn) and in my numerous searches I have found a lot of issues with Birfield failures when running over 35" tires. My question is... are the failures due to the tire size or because of drivetrain torque? A lot of you all are running larger engines but I am running a B series diesel which is not a torque monster and wonder if the stock Birfields will suffice with 35x12.5 or 35x14.5 tires. BTW I rarely do any serious offroad 4x4ing but commute on some of the worst roads on the planet.