Hey guys, don't know if this right spot for this but...I just got 3.73 installed. I have tunercat, if I just use the tool to correct the speedo, will it throw any of the tune off? Can I get away with only tuning the speedo or does spark/fuel tables need to get changed? I have a t56, any input appreciated. Thanks

 

Changing the speedometer settings is all you need to do in a M6. Never did a M6, but if you get the pop-up to also adjust the A4 shift tables you can just close it and ignore them.

 

thanks man