3.0TDi hunting at low speeds

[tgm147]

Hi guys

One day I'll put a post on this forum without asking for help!

The car is a 3.0TDI on a 05 plate with 48k miles on. Driving on the motorway it's fine, hard acceleration appears to be fine, but just cruising along at 30 the box feels like it's hunting between 3rd and 4th. Does this sound like an issue with the box or just a characteristic of the box? It's quite annoying that it won't just cruise along without the engine note constantly going up and down!

Cheers