I have an 06 2500 Mega Cab 4X4 with the 5.9 Cummings. I have an Edge Juice/Attitude and AFE Stage 2 Intake.I tow a 39' Weekend Warrior 5th Wheel 1-2 times per month. I have 34,000 miles and for the most part have kept up with the scheduled maint. I have been having nothing but problems with trans selenoid/sensor packs going bad. Four (4) total over the past 8,000 miles. Is there any upgrades known that can get rid of this weak point? Also I have a P0191 code Fuel rail sensor/peformance light. I am due for a fuel filter change, so is that the reason for the light?