X15 efficiency idle vibration

[schISM]

First I would suggest you set your idle to 700 rpm as previously suggested. The min/max input rpm for an RDS series tranny is 500-800, that will smooth out the engine a bit and the urge to move you feel will not be any worse than it is at 600rpm’s. Next I would get ahold of a trusted tech and have them enable the “neutral at stop” function in the Allison programming if you wanna do away with the torque converter “grab” at idle. Unfortunately if you do the “neutral at stop” it probably won’t be as good for roto-milling or backing into a paver ect...