With my new found rear rubber (275 RA1s), my rear end puked out a ton of gear oil today. Maybe it was a combination of me driving the **** out of the car, or the fact that it was hot and the car ran four 40 minute sessions (calculated nearly 200 miles). Regardless, the undercarraige and exhaust is coated in gear oil. Anyone else had this occur?

 

You musta been beating the **** out of it. Time for a diff cooler.

 

The only thing I can think of is that you boiled the gear oil (is that even possible???)....and it leaked through the axle seals...or you melted the axle seals....as said previously...time for a diff cooler

 

When you start really beating that thing its very common. Def need to use serious gear oil and some cooling. Now you need the other diff with those R1'a on there.
BJ

 

Yeah, I know. That's next month's projects...

 

you definatelt spewed out your vent tube which is routed to your frame.if you follow the route of the oil ,it empties into the frame then straight on to the exhaust(nissans smart idea).not only do you need a diff cooler, you also should make a catchcan for your vent tube.route it somewhere else away from your exhaust.like on the back side of your frame.
Otherwise,plan on this happening again.