Nissan GT-R

The R35 is unusual enough that generic assumptions rarely hold. Its VR38DETT is a twin-turbo V6 and its transmission is a rear-mounted six-speed dual-clutch transaxle with its own control unit, its own fluid specification and its own extensive code set — most GT-R faults that reach a workshop are transaxle or clutch-pressure codes rather than engine ones. The four-wheel-drive system is an electronically controlled clutch pack feeding the front axle, so a driveline complaint may be a torque-split fault with no mechanical wear at all. Fluid condition and level are genuine diagnostic inputs on this car, not maintenance items, and reading the transmission's own adaptation data is usually the first useful step.