I took my car into the dealer for a leak from the rear differential. It was diagnosed as the pinion seal failing. They quoted me at $550 for parts and $1450 for labor. Does this seem right? I saw online that Land Rover sells a pinion repair kit for about $140. Is the dealership trying to leverage that they’re the only ones that can fix it in the area due to special tools? Any advice or do I just swallow it and go for it?