this.
also it's a weird setup on the GTR - It's RWD almost all the time until you really boot it, then it sends power to the front wheels as well.
Theres a "torque transfer" gauge that shows how much torque is being sent forwards. You can make it permanently RWD by fulling a fuse.
does yours have a torque split controller fitted?? if not its the best mod iv done to the car, for 1 it stops the 4wd from turning off the harder into a corner you push and you can adjust the amount of understeer/oversteer to suit the track. some also have a switch to go from 2wd to 4wd



