My rear pinion seal has begun to leak, worse if pulling a load. I have already bought a new seal for the Dana 80 hybrid that I have. Just wondering how to get that odd sized nut off? I know the torque setting and how to mark it before removal. And special tool that i can buy to remove nut and tool to install the seal??
Thanks in advance.

 

Check your rear diff vent. sounds like it is plugged. If it is, it probablu needs an oil changd too.