Intermittent Shudder

[Hallam109]

I have a A8L 3L 50tdi 68 Plate 46500 Miles and have a intermittent shudder not sure if its a misfire or a gearbox problem doesn't happen all journeys and its not happening in a certain gear or at a certain speed but seems to happen when its coasting anyone else had this

[Steve Q]

Id recommend a diagnostic check to see if any fault codes flag up. When was the gearbox last serviced? It might be worth looking at gearbox oil change to see if that makes it smoother. 

[Hallam109]

It’s been dealer serviced since new but been told the gearbox is sealed for life