I would like to change my 2015 SD F350 SRW with 20” wheels from 3:55 to 4:10. Not sure what all is involved but I understand once it is complete it has to be reprogrammed for the transmission and od to shift and work properly. Shops to do the work do not reprogram. Not sure if Ford dealerships can. Can I make this work by purchasing a tuner and going through theECM?