Their shockproof line is something I hadn't seen before. I would just continue using the 75W90 GL-5 oil they offer for the rear diff.

I bought this fluid transfer pump and it didnt work at all for me.

Amazon.com: Sierra Tools JB5684 Battery Operated Liquid Transfer Pump: Home & Garden

So I just bought a standard hand pump and that did the job.

There are several different versions of the Redline Fluid and they cover a wide range of uses and abuses.

The Redline 75W90 NS actually lacks some of the friction modifiers found in the regular 75W90 which makes it less slippery and ok to use in a transmission and more aggressive in a differential. That does not mean use it! Please keep reading.......

We have been using Redline for some time at the shop and the fluids we use for the following applications are....
We use the normal 75W90 as Spearfish and several others have already stated for the differential. You can find it on our site HERE.
We have recently begun using Redline's MT-85 for transmission fluid. We have been using the MT-90 in 300ZX's for some time but this fluid did not work well in 350Z and 370Z's. Redline specifically lists this fluid for use in the 370Z. You can see it on their site HERE. I really appreciate a customer and forum member for pointing this fluid out to us. The MT-85 fluid can be found on our site HERE.

Finally you can find the metal washers for the drain plugs on our site HERE.


This is what we have found works well in the majority of 370Z applications. If you are using your car for some extreme application you may want to look into another Redline fluid for your car but so far these fluids have worked well.

I agree with this and have used these fluids in my car. So far no issues. The tranny fluid does make the shifting smoother and easier esp at cold temps.

This is SOOOOO true! :roflpuke2:

Has anyone tried the Redline Shockproof Light for the rear diff?

Nope but I've used that in the transmission by recommendation from a friend. It worked well in his G35 and my 350Z.

At what mileage did you do the fluid change. (I did not see this mentioned in the maintenance manual..only an inspection..)

I changed my differential fluid at 29,160 mi.

Thanks for the write-up, by the way!

Glad this is helping everyone out. I've made a point to change my rear diff fluid every spring...essentially every 8k miles.

I'm assuming you're changing it this frequently because you track the car?

Anyone know if we can get away with using a non-Nissan washer? Every dealership around me needs to order the part and I wanted to do my diff/trans this weekend.

You prob could get it from the site I go to. Nissanparts.cc

You could use a regular copper/al crush washer since Nissan doesn't have any.
We sell them HERE if you are stuck on the Nissan washer.

If this is your first time you can probably get away with not changing it because it is a solid crush washer. This is not a guarantee it wont leak but 99% of the time you can get away with reusing it as long as it wasn't damaged or over-tightened.

Thanks Chuck... normally I would order OEM but I have all the redline fluid and I am pretty much hellbent on doing the change this weekend.

So I have 11k miles on my car, changing the diff oil next weekend. I just saw this thread and the nasty oil coming out at just 4kmiles and it got me thinking..Should I have changed it before?

It's too late now, just do it and see what comes out of it. The diff fluid is only a lubrication for the gears anyway, I don't think it changes the LSD since the LSD is in a sealed unit inside. I guess you can argue it can cool the LSD unit better as the fluid soaked in it can have a lower temp. Personally I will change it again at 6500 miles and see what it looks like. SInce I already have all the tools, the parts really only cost me $25 (2 quarts of 75W90 GL-5 fluid)

so change it every 6.5k miles?

for me yes. i would say not more than 2 years for most people. personally i am going to make a more definitie judgement at the next change as nissan might have crappy fluids too. amsoil are rated for 100k miles, but i will see how it handles 200 autox runs a year

Well I have just changed out my diff. fluid with the Redline 75w90 fluid @ 8200 miles I got the car with 2700 miles on her and Wanted to do a complete oil change on her once I had her good and broke in I did the engine with the Redline oil as well and will be doing the trans. tomorrow when the oil arrives from Redline my local Redline dealer did not have the MT-85 in stock wityh the rest of the oil's.
I want to thank Spearfish for his write up great job much reps.

Rich

While the part number for the Nissan metal gasket is 38351B, as seen in the exploded differential illustration, the SKU# is 11026-Z34006, which is what the parts department needs to find the part. The first dealer I went to couldn't figure it out, but the second one did.

Nissan metal gasket 38351B = SKU# 1026-Z34006

Just did mine at 2900 miles.What came out just scared me.Black stinky oil,and about half an inch of metal shaving on the magnet.Hope that is part of brake in.
Will do another change in spring,or at least once a year.Filled with Redline Gear Oil 75-90.Tranny is next.Hope the warm weather holds up,so next weekend project.Great write up.

I changed my diff oil today and ScGRacer stopped by in his white Nismo to do the same. I have 27k on my car and figured it was about time to do the change. Redline was not available locally so we each grabbed two quarts of Royale Purple 75W90 which claims to be great with LSD's and is both GL-4 and GL-5 compatible. I'm sure you don't have to change it so early but it's piece of mind.
http://i65.photobucket.com/albums/h2...1/467273a6.jpg
I'm under my car, ScGRacer helping out.
http://i65.photobucket.com/albums/h2...1/110721b3.jpg
http://i65.photobucket.com/albums/h2...1/4ef72b7d.jpg
You can see all the metal shavings and sludge stuck to the magnetic bolt.
http://i65.photobucket.com/albums/h2...1/c515d3dc.jpg
http://i65.photobucket.com/albums/h2...1/80701bd4.jpg
http://i65.photobucket.com/albums/h2...1/503feb38.jpg
http://i65.photobucket.com/albums/h2...1/9fd311cf.jpg
http://i65.photobucket.com/albums/h2...1/ad59f66c.jpg

Just did both of the Z's today and surprised at the color of the oil drained and the xxxxxxx on the magnetic drain plug.

First some history on both car(s).

Both are 2009 MT w/34k miles on the OEM factory installed gear oil (as in never been drained)
Reside in Northern California
Cars are garaged all of the time
Daily Driven and spirited canyon driving


After viewing the magnetic drain plug and the color of the oil being drained and after reading and seeing and hearing a lot of members drain results has me wondering IF the difference in my drains and the rest has anything to do with geographical location/weather and whether or not the car is garaged.

Any-who here are the pics. Both Z's had the same results. No sludge and hardly any metal shavings. The oil being drained still has the honey colored. All I can say is I am glad it looks like this at 34k miles on it's first drain.


https://lh3.googleusercontent.com/-r...0/SAM_4210.JPG



https://lh3.googleusercontent.com/--...0/SAM_4211.JPG



https://lh4.googleusercontent.com/-K...0/SAM_4212.JPG

.

^ interesting.....

im looking forward to changing mine. This looks like fun! I'll be changing mine around 3500 miles.

beware of foul odors when you drain the fluid. :icon17:

New to changing diff fluid
 

Hey guys, I have never had to change the diff fluid on a car, and this doesn't look any harder than an oil change....

My main questions:
I have a 2009 Sport Touring Auto... Do I need to use any sort of special fluid?
Also, I am a fan of synthetics, what's a good synthetic diff fluid?
And lastly, how much fluid do I need to buy?

^ I use Redline

I changed my differential fluid today.. the process was fairly easy, I only had issues getting the actual fluid in the differential itself, having an aftermarket exhaust and the loaction of the filler hole made it a pain in the azz. But all in all, Im happy. I used Mobil 1 75w-90 Synthetic.

Gotta do mine in the spring. Subscribed for future reference.

I just went to a shop to get it done. They said I needed 3 quarts not 2. I was confused by this and referred to this thread. They said it requires 3 and that they won't do it using 2 quarts as it is not safe?

Not as safe? LOL.

They are screwing up their units. For the record, it takes 1.5 quarts which is 3 pints. If you buy 2 quarts, you have more than enough oil to completely top it off and have some left over.

another good write up, thanks!
(rep'd)

phaddi_inc

Can I use the regular LSD Red Line oil listed in the OP's DIY in a Base model open differential? I just ordered two...should have asked this question before I suppose. :rofl2:

Yes it just has a friction modifier in it.

I did this on Saturday. Great write up! Super simple, no pics necessary.

Sweet! Thank you for helping me get rid of this slight anxiety.

http://img.photobucket.com/albums/v6...z/IMG_1727.jpg

http://img.photobucket.com/albums/v6...z/IMG_1724.jpg

Put some Red Line in there.

I've changed my rear diff oil three or four times now over the past 3 years. This past swap, the oil looked pristine while draining out. Compared to how terrible it looked the first few times, I'm not sure what that means...