I am new to the forum I have a 2006 3500 single wheel 4x4 5.9 Cummins trans started shifting funny then it tries starting off in 2nd and doesn’t want to down shift. So take trans shop and guy changes something on trans and says it didn’t know what gear it was in new part doesn’t fix it, put another new one on still don’t fix he says it needs a new computer put new one on then had to haul it to dodge dealership to flash it they drop the pan and say it’s got to have a new transmission because there is a snap ring in the pan take it back to trans shop order new trans from somewhere in Nevada out new trans and torque converter in and still have the same problem starting off in 2nd any help would be greatly appreciated