Presently running 91 RD690S with 300-7sp, dump body. Want to replace something that will ride better, but don't want tranny that must shift much more than 7spd. Considering 2005 CXN613 with 380-6sp, 3.86 gears. Have heard rumors that these engines have had cam problems. Also anyone know how the power of the 380 compares to my EM-7 300. It has tons of torque, but not a lot of speed because it has 5.73 gears. I would like a little more road speed. Would consider granite or ch, but can't find these with air ride and less tranny speeds than 8LL. That might work, but I think the T306 6 speed would be less shifting. Several CXN613s are available with 6 spds. Would the 6spd. have enough low end for occasional offroad?
