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How can I tell if my trans had a tune applied? I purchased a used 2012 2500 HO and after looking at it closely it looks as if someone may have done a stealth delete. No way to tell the history on the truck other than some plugs are undone under the hood, getting about 17mpg mixed driving and the transmission seems to shift quickly and firm, don't want to say it's a HARD shift but it's sharp for sure and usually shifts out of 1st and 2nd before I even get thru a traffic light intersection.

I have ordered the sinister EGR delete kit, and full DPF. Now for all I know this may have already had a EFI live single tune installed and I would be clueless, no way of telling. Is there a way to tell on the transmission ? And if I load the EFI live tune when there is a transmission tune already loaded will that delete the existing trans tune?
 
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