This is my first post here. I hope someone can help with this query. My Mk4 Astra auto is stuck in top gear and the local garage said it requires a new transmission ECU and would have to go to a Vauxhall dealer for fitting and programming. I have also been told elsewhere that only the engine ECU needs programming and the transmission ECU does not.
I have found a place on the net that supplies ECU's if given the part No. on the casing.
So does a transmission ECU need programming and does it need to be fitted by a Vauxhall main dealer.
Hope you can help.