My g35 is in limp mode. i don’t see no problem on the transmission because i can feel the power holding back. only electrical problem that i noticed was that the main 12v charger stops working after a minute. and sometimes lights be dimming a little. i installed a new alternator, battery,4 cam shafts(autozone), crankshaft (dealer), and 2 throttle body (autozone). also did a muffler job on it. i sometimes get like a gas/burnt type of smell. when i let go off the gas the rev needle drops & bounce.