DIY: Rear Differential Oil Change

m4a1mustang · 02-10-2010, 06:53 AM

Quote:

Originally Posted by spearfish25

Just don't get it on your hands. It's like the acid saliva from Alien. (but not corrosive, just nasty)

Oh I will make sure to have on some gloves!

vipor · 02-10-2010, 08:48 AM

Some pics from when I changed my fluid a couple weeks ago. So you guys can see the drain and fill locations.

Sorry they're so large and some are blurry.

Drain Plug

Fill Plug

FricFrac · 02-10-2010, 04:05 PM

Don't recall of the top of my head but it is in your service manual - its the first big service IIRC...

tranceformer · 02-10-2010, 07:14 PM

IIRC it's something like 30k miles, but IMO if you're really hard on the car it wouldn't hurt to do it more often.

spearfish25 · 02-11-2010, 02:18 PM

Does anyone know the difference between Redline 75w90 and 75w90NS? The 'regular' 75w90 is what I put in the rear diff during my last change. Reading the info online says it's not for manual transmissions due to issues with the synchros...I assume it's fine for the diff. Then there is the 75w90NS which is listed under manual transmission fluids but is GL-5 which is rear diff compatible. The description for the NS also seems to talk more about LSDs and improving locking ability. (in contrast to an earlier post saying it's not hypoid gear compatible)

Thoughts?

FricFrac · 02-11-2010, 09:32 PM

As far as I know there is just a friction modifier added for LSDs with the NS version. Other than that they are both GL-5 fluids (which is why you don't use them in your GL-4 tranny).

htt760 · 03-12-2010, 11:53 AM

Any word on the NS version of the Redline? Im about to do my interval change and thinking of leaning towards (NO NS) because our factory ones dont need friction modifier when replacing.

Zdom · 03-12-2010, 12:07 PM

What is the interval for changing this?

spearfish25 · 03-12-2010, 01:23 PM

Interval is usually 30k miles I think. Final word I got is to NOT use the NS version.

Volcom370Z · 05-24-2010, 11:39 AM

Quote:

Originally Posted by spearfish25

Interval is usually 30k miles I think. Final word I got is to NOT use the NS version.

I'm lost... what is the NS version? I see two different 75W90s on Redlines site, one is the regular and one is their shockproof version. Which one do I not get?

Volcom370Z · 05-31-2010, 10:31 AM

Quote:

Originally Posted by Volcom370Z

I'm lost... what is the NS version? I see two different 75W90s on Redlines site, one is the regular and one is their shockproof version. Which one do I not get?

Anyone?

spearfish25 · 05-31-2010, 11:03 AM

Quote:

Originally Posted by Volcom370Z

I'm lost... what is the NS version? I see two different 75W90s on Redlines site, one is the regular and one is their shockproof version. Which one do I not get?

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.

htt760 · 03-12-2010, 01:43 PM

thanks Spearfish....

bejan · 03-21-2010, 05:12 PM

I just changed my Rear Differential Oil today with the help of this thread! My Z has 4,000 miles on it.

Thanks to SpearFish and (Jeff) Schrute for helping a brother out.

By the way, I am most likely the biggest noob when it comes to cars on this forum. I've always paid an arm and a leg to get my maintenance done on my other cars. Now it's time to do it myself and save some money! Everyone has to start somewhere.

My point is, don't feel discouraged to do this. It is very easy and if I can do it, so can you!

(I changed my engine oil a couple weeks back, that was also very easy too!)

Anways...

Here's a picture of the old rear differential oil (left side) that came from my 370Z and the new RedLine 75W90 oil (right side). Looking at the difference, I am so glad that I changed the rear differential oil now than later!

Might I also suggest using a battery powered siphon pump. I bought mine from Amazon, this is the exact one I got (there are cheaper ones): I think battery powered is easier than air pump powered. It was so easy for me to pump the new oil back in with this: Amazon.com: Sierra Tools JB5684 Battery Operated Liquid Transfer Pump: Home & Garden

I hope my post helped. It's the least I can do! Thanks!

spearfish25 · 05-31-2010, 07:52 AM

Here is the pump I'll be using next. Easy to clean, easy to use.
fluid transfer pump

02-10-2010, 08:48 AM	#2 (permalink)
vipor A True Z Fanatic Join Date: Aug 2009 Location: Euless, TX [ DFW ] Age: 42 Posts: 13,531 Drives: Nismo 09-0183 QAB Rep Power: 49	Some pics from when I changed my fluid a couple weeks ago. So you guys can see the drain and fill locations. Sorry they're so large and some are blurry. Drain Plug Fill Plug __________________ 2009 NISMO # 0193 \| QAB \| Albums! \| 05.04.10 (Dynojet) 291.94hp/248.28tq Oil Cooler (DIY) \| Custom Headlights \| GTSPEC Braces \| F.I. Long Tube Headers

02-10-2010, 04:05 PM	#3 (permalink)
FricFrac A True Z Fanatic Join Date: Dec 2008 Location: Victoria, BC Posts: 1,481 Drives: 370Z 300ZX 280ZX 240 Rep Power: 229	Don't recall of the top of my head but it is in your service manual - its the first big service IIRC... __________________ '09 370Z - '93 300ZX Vert - '83 280ZX - '83 280ZXT -'81 280ZXT stroker - '72 240Z - Stillen CBE, HFC, G3, Grounding Kit, Sways // Swift Spring // H&R 15mm // 5% Tint // Clear Bra //

02-10-2010, 07:14 PM	#4 (permalink)
tranceformer A True Z Fanatic Join Date: Nov 2008 Location: Palm Beach, FL Posts: 1,213 Drives: 2009 370Z PW 6MT Rep Power: 268	IIRC it's something like 30k miles, but IMO if you're really hard on the car it wouldn't hurt to do it more often. __________________ Ray 2009 370Z Base Sport 6MT / 12.860 @ 109.09mph / 1.921 60ft / street tires official 1/4 mile track times

02-11-2010, 02:18 PM	#5 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1857	Does anyone know the difference between Redline 75w90 and 75w90NS? The 'regular' 75w90 is what I put in the rear diff during my last change. Reading the info online says it's not for manual transmissions due to issues with the synchros...I assume it's fine for the diff. Then there is the 75w90NS which is listed under manual transmission fluids but is GL-5 which is rear diff compatible. The description for the NS also seems to talk more about LSDs and improving locking ability. (in contrast to an earlier post saying it's not hypoid gear compatible) Thoughts? __________________ 2013 Cadillac V-Wagon, RIP Z

02-11-2010, 09:32 PM	#6 (permalink)
FricFrac A True Z Fanatic Join Date: Dec 2008 Location: Victoria, BC Posts: 1,481 Drives: 370Z 300ZX 280ZX 240 Rep Power: 229	As far as I know there is just a friction modifier added for LSDs with the NS version. Other than that they are both GL-5 fluids (which is why you don't use them in your GL-4 tranny). __________________ '09 370Z - '93 300ZX Vert - '83 280ZX - '83 280ZXT -'81 280ZXT stroker - '72 240Z - Stillen CBE, HFC, G3, Grounding Kit, Sways // Swift Spring // H&R 15mm // 5% Tint // Clear Bra //

03-12-2010, 11:53 AM	#7 (permalink)
htt760 Base Member Join Date: May 2009 Location: Bonsall, CA (San Diego) Posts: 246 Drives: 2009 Base 370z Rep Power: 16	Any word on the NS version of the Redline? Im about to do my interval change and thinking of leaning towards (NO NS) because our factory ones dont need friction modifier when replacing. __________________ http://i39.photobucket.com/albums/e1...f/Huys3701.jpg Volks LE 37's 19x9.5 - 19x10.5 (+12 offset), Status Elite Intakes and Some fast Stickers

03-12-2010, 12:07 PM	#8 (permalink)
Zdom Base Member Join Date: Nov 2009 Location: VA Posts: 46 Drives: 09 Nissan 370Z Tour Rep Power: 16	What is the interval for changing this?

03-12-2010, 01:23 PM	#9 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1857	Interval is usually 30k miles I think. Final word I got is to NOT use the NS version. __________________ 2013 Cadillac V-Wagon, RIP Z

03-12-2010, 01:43 PM	#13 (permalink)
htt760 Base Member Join Date: May 2009 Location: Bonsall, CA (San Diego) Posts: 246 Drives: 2009 Base 370z Rep Power: 16	thanks Spearfish.... __________________ http://i39.photobucket.com/albums/e1...f/Huys3701.jpg Volks LE 37's 19x9.5 - 19x10.5 (+12 offset), Status Elite Intakes and Some fast Stickers

05-31-2010, 07:52 AM	#15 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1857	Here is the pump I'll be using next. Easy to clean, easy to use. fluid transfer pump __________________ 2013 Cadillac V-Wagon, RIP Z

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