My 05 NISMO CC has been driving funny ever since I got it back from the dealer when they replaced the timing chain tensioner. When I accelerate after coming to a stop the engine will rev but it doesn't engage. It also happens if I'm backing up and pause then step on the gas there is a delay between the enigine accelerating and the drivetrain engaging. I can't tell if it's the transmission or not, but the tranny (AT) is slow to shift when going from D to R or vise versa. I just looked underneath the truck and noticed that my rear differential looks funny (pic below). Is this normal? Is my defferntial leaking or have a blown gasket and that is causing problems? Thanks for any info/advice.
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