Another issue that has come up recently is with high horsepower/torque(700+hp) cars not wanting to shift gears. This is a TCM/ECM related issue that is being worked on. SP Engineering posted up some information on the problem.
After any work to the transmission, and also as part of the performance optimization service, the clutches in the transmission generally need to be adjusted with a Consult III. The Consult III is a Panasonic Toughbook laptop with software to work with Nissan and Infiniti vehicles. However, to work on the Nissan GT-R, you need a special “GT-R card” .The Consult III and GT-R card are very difficult to get a hold of. Mostly only certified Nissan dealers have it. A few aftermarket companies around the world have Consult III’s, but they are not common, and they are expensive. There are 15 different settings for the clutch touch point and capacity,which adjust how the car drives, and the firmness of the shifts.
The factory clutch starts to slip with the factory fluids at around 650 wheel horsepower. There are upgraded clutch pack, and OEM replacements available.
