Around 2005 there were some people on the forum if I remember correctly that advocated having having your PCM reprogrammed. I think they had a source that had Roush Racing program and you told them the mods for programming. Additionally, The PCM banks in the later Lightning were changed, When re-programmed the PCM had the bank programs. I am trying to find out who still does this because I had it done years ago and forgot the persons name on here. I changed tire size and the dealer puts the tire size in the PCM but it does not effect the speedometer. MPH still same as old tire size and off 7 MPH.

 

around 2002 time frame, SCT products with a tune from a reputable Lightning tuner



it's still that way today

 

there was the hand held programmable tuner that I used to use.. Predator diablo was make and model

 

and only one reputable tuner uses that software today



even he uses SCT products majority of the time now also