The stores around here are limited in their selection gear oils. Which do you think is better for the differentials? Mobil 1 or royal purple max gear? Thanks.

 

D4 and D6 would work just fine in our transmissions .. I use D4 myself for almost a year now with no issues whatsoever.. As for the diff oil , nothing can beat Motul fluids, believe me

 

I'm curious about this thread.

My 2009 G37 7AT has 64K miles and the dealer is recommending the differential oil be changed. This diff oil was changed at 30K because the dealer told me that Nissan had switched oil types about the time the car was made, and he recommended I change it to make sure I had the newer oil in it. I figured why not, it was free, and they did it.

Changing the diff oil is not included in either the Schedule 1 or Schedule 2 maintenance tables. Flushing the ATF is not listed, either. However, both (the diff oil and flushing the ATF) are listed on the "Premium Maintenance" table.

So they're basically saying you don't have to do either, but doing both is good for the car.

My personal feeling is that yes, fluids do get old and their protection and functional properties can break down over time, especially in severe-use environments. Still, I can't see myself getting this done if it's not listed as "required" in the Schedule 1 or 2 tables.

Is Nissan rolling the dice here, or is failure eventual - as in planned obsolescence? Are there any certified Nissan techs reading this can weigh in?

 

Just changed the rear differential oil on my 2010 G37x. It has 85,000km. I doubt if the previous owner ever did it. I noticed an immediate difference. The infamous low speed transmission jerkiness lessened significantly. The car seems to "sail" more. Hoping to do the front differential/transfer case next. Will probably change the transmission oil at 95,000km.

 

I got mine trans fluid done from Infiniti for 210, might have been a little less. They first put in BG oil, when I found out, I had them replace with Nissan S at their cost. I need to have the diff done. I am getting it done when they take the diff out for new bushings. Nissan uses Mobil One. Motul is better.

 

Why did you have them flush it again with Nissan fluid instead of keeping the BG trans fluid in it?

 

I changed my rear diff with Mobil 1 75W-90, and it seems to be really good. It took about 1.4 quarts for the rear diff. I haven't done the tranny yet, but if I do; I will do with OEM stuff for the tranny

 

I felt that the factory stuff would be better. I have used aftermarket on other cars. I don't want something bad to happen and think that it was something in the fluid.

 

The dealership/ BG would have claimed responsibility if it caused damaged. I work for Toyota and we also use BG for transmission services.

 

I am talking more down the line. Even if something happened a week later, they would probably say that, well you have a lot of miles.

 

How many miles do you have? Was this a dealer recommended service or did you go in specifically asking for this service?

 

I think I only had 168k at the time, but you never know. I heard on here that you should replace it every 30k and my car hadn't its fluid changed since 120k.

 

@conroy What fluid did you go with?

 

I had BG fluid in my G before and it shifts sooo much smother than the Nissan stuff. Handles heat better too. And just for the record, this is what the owners manual says about the dif fluid.

For 7A/T 2WD models: API GL-5 Synthetic Gear Oil Viscosity SAE 75W-90. All other models: Genuine NISSAN Differential Oil Hypoid Super GL-5 80W-90 or API GL-5, Viscosity SAE 80W-90