I have an '05 G35x with 80,000 miles on her. For some reason, when the engine is warm, reverse will not engage. Cold, it's fine, shift, wait a sec and reverse, the warmer it gets the worse. After 5-10 mins of driving, you have to rev it a bit, more than that, shift back and forth after 20 mins, nothing, it just reves. Forward gears are flawless, just reverse for some reason.
Parking only where I can drive out forwards now
Craig.