hi all just got my jag back on the road after repairing my tranny and all seems good but for harsh gear shifting between 1st&2nd and 3rd&4th no engine fault light and doesn't do it all the time when i put code reader in i get engine fault code of p1603 which is tcm eprom it says to do a transmission drive cycle which is to drive in second at 40mph for 5 seconds and then in all the other gears at the same speed till in drive and 50-80mph for 1mile has anyone done this and can it be done with the car jacked up as don't want to trash my gearbox