DIY: Rear Differential Oil Change

spearfish25 · 10-11-2009, 12:08 AM

Here's a link. I used the exact one in the picture and bought it at Pepboys for $12.

K-Tool International (KTI72250) Mult Use Siphon Pump - KTI72250

schrute · 11-04-2009, 02:48 AM

Another helpful DIY from Spearfish - Thanks man! Made it easy! Rep added.

The tip about the articulating joint for the wrench was spot on, I was glad I had one. Also, haven't used the latex gloves as much lately when working on the car but your suggestion to use them was also a good one - this stuff kinda stinks.

edit: My journal has a pic of how much junk that magnetic drain bolt had on it. It was a lot.

FricFrac · 12-03-2009, 10:30 PM

I'm assuming in the LSD there is special LSD fluid in the pumpkin and when you change the oil in the diff you are just changing the "normal" oil so there is no need to use an LSD additive?

Germanguy · 06-26-2012, 12:56 PM

Do I really need two of the gaskets: [38351B] WASHER for the oilswap ? My Z has 10k miles.

TipsZ · 12-15-2009, 01:55 PM

Which Diff oil should I use?

Redline 75w90NS Gear oil quarts and cases (w/o friction modifier)
or
Redline 75w90 Gear oil quarts and cases (w/friction modifier)

spearfish25 · 12-15-2009, 04:31 PM

I think I used the 75W90 (no NS designation). Honestly, I never knew there was even a second option.

davidyan · 12-15-2009, 10:06 PM

^ this question was raised on another thread as well. Don't use the NS version as it is not meant for hypoid LSD's.

Zeto · 02-07-2010, 10:28 PM

Just did my diff and man was that stuff nasty! Thanks for the DIY spearfish, +1

spearfish25 · 02-09-2010, 07:05 PM

Quote:

Originally Posted by Zeto

Just did my diff and man was that stuff nasty! Thanks for the DIY spearfish, +1

No problem

. Between the transmission and the diff changes, the diff was visually more pleasing to change. The amount of junk that came out was impressive. However, I didn't notice any driving difference. The tranny however had pristine looking fluid come out, but it shifts like butter now. Go figure.

m4a1mustang · 02-07-2010, 10:29 PM

I will be doing my rear diff change soon. Can't wait to smell the stuff!!!

spearfish25 · 02-09-2010, 07:06 PM

Quote:

Originally Posted by m4a1mustang

I will be doing my rear diff change soon. Can't wait to smell the stuff!!!

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

tranceformer · 02-10-2010, 06:51 AM

Quote:

Originally Posted by spearfish25

No problem

. Between the transmission and the diff changes, the diff was visually more pleasing to change. The amount of junk that came out was impressive. However, I didn't notice any driving difference. The tranny however had pristine looking fluid come out, but it shifts like butter now. Go figure.

was there a lot of crap on the magnetic drain plug?

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)

i like to refer to it as the devil's piss.

Zeto · 02-10-2010, 08:27 AM

Quote:

Originally Posted by tranceformer

was there a lot of crap on the magnetic drain plug?.

It was my first time and yes there was. Make sure you clean it throughly.

schrute · 02-10-2010, 03:24 PM

Quote:

Originally Posted by tranceformer

was there a lot of crap on the magnetic drain plug?

Here's what mine looked like

initialgemini · 02-10-2010, 03:44 PM

Just for reference, but how often should you change your differential and transmission fluid?

11-04-2009, 02:48 AM	#2 (permalink)
schrute Track Member Join Date: Aug 2009 Location: utah Posts: 781 Drives: my z every day Rep Power: 17	Another helpful DIY from Spearfish - Thanks man! Made it easy! Rep added. The tip about the articulating joint for the wrench was spot on, I was glad I had one. Also, haven't used the latex gloves as much lately when working on the car but your suggestion to use them was also a good one - this stuff kinda stinks. edit: My journal has a pic of how much junk that magnetic drain bolt had on it. It was a lot. __________________ my journal \| 2009 370z touring \| 6mt \| platinum graphite \| my album second skin \| mr works \| fast intentions \| ssr \| eibach \| hotchkis \| spc \| toyo \| bluebatmobile \| v-led \| jwt \| ventureshield \| tinted tails Last edited by schrute; 11-04-2009 at 03:23 AM.

12-03-2009, 10:30 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	I'm assuming in the LSD there is special LSD fluid in the pumpkin and when you change the oil in the diff you are just changing the "normal" oil so there is no need to use an LSD additive? __________________ '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 //

12-15-2009, 01:55 PM	#5 (permalink)
TipsZ Track Member Join Date: Mar 2009 Location: Lithia, FL Age: 51 Posts: 552 Drives: 09 Nissan 370z CS M6 Rep Power: 187	Which Diff oil should I use? Redline 75w90NS Gear oil quarts and cases (w/o friction modifier) or Redline 75w90 Gear oil quarts and cases (w/friction modifier) __________________ Dynojet 285 HP/245 TQ (pre CBE)// Agency Power CBE // GTM Test Pipes // JWT Pop Chargers // B&M Short Shifter // Eibach Springs // Powder-coated Akebono's // Powder-coated Strut Bar // Black Chromed 19" Rays // // Redline Designs Graphics TipsZ journal

12-15-2009, 04:31 PM	#6 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1857	I think I used the 75W90 (no NS designation). Honestly, I never knew there was even a second option. __________________ 2013 Cadillac V-Wagon, RIP Z

02-07-2010, 10:29 PM	#10 (permalink)
m4a1mustang A True Z Fanatic Join Date: Feb 2009 Location: Northern VA Posts: 55,385 Drives: on two wheels Rep Power: 6963	I will be doing my rear diff change soon. Can't wait to smell the stuff!!! __________________ - Steve Zs & Coffee - Saturdays at 10AM in Fairfax, VA and Columbia, MD (Click the banner!) LIKE us on Facebook!

10-11-2009, 12:08 AM	#1 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1857	Here's a link. I used the exact one in the picture and bought it at Pepboys for $12. K-Tool International (KTI72250) Mult Use Siphon Pump - KTI72250

06-26-2012, 12:56 PM	#4 (permalink)
Germanguy Base Member Join Date: Nov 2010 Location: Germany Posts: 67 Drives: 07 350z Rep Power: 15	Do I really need two of the gaskets: [38351B] WASHER for the oilswap ? My Z has 10k miles.

12-15-2009, 10:06 PM	#7 (permalink)
davidyan Base Member Join Date: Jun 2009 Location: CA Posts: 244 Drives: PG 370Z Sport 6MT Rep Power: 16	^ this question was raised on another thread as well. Don't use the NS version as it is not meant for hypoid LSD's.

02-07-2010, 10:28 PM	#8 (permalink)
Zeto Track Member Join Date: Apr 2009 Location: North NJ Age: 41 Posts: 766 Drives: 09 Pearl White 370Z Rep Power: 267	Just did my diff and man was that stuff nasty! Thanks for the DIY spearfish, +1

02-10-2010, 03:44 PM	#15 (permalink)
initialgemini Enthusiast Member Join Date: Mar 2009 Location: Irvine, CA Posts: 340 Drives: 2011 FX 35 Rep Power: 251	Just for reference, but how often should you change your differential and transmission fluid? __________________ CY 370z \|Sports Package\| Berk CBE\| Berk High Flow Cats (awaiting install)\|BBS LM\|Eibach Pro-Kit Springs\|Stillen Sway Bars\|TWS Shift Knob\|B&M Short Shifter

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