the vehicle is anything but stock currently, hence why i said i wasnt concerned about tranny etc at this time. An atlas should have no trouble handling the power and the 6.72 gears i have now are more than sufficient for 44's, I'm on 40's now. Problem is the axles weight roughly the same as the state of Texas until i can afford the disk conversion, and then they will still be very heavy. Im slightly worried about the th400 with the torque numbers i want, but the best way to find a weak link is to beat on it till it breaks and i will worry about it then. Current project is the bad motor so im wanting to get the best torque numbers i can for a reasonable price and still have a little in the jeep piggy bank for the next hing that breaks.