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Changing the Differential / Transmission Oil

Old 01-22-2008, 01:32 PM
  #241  
Accordaleer
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Would new fluid in the diff, help it lock up better? Just curious, I dont autoX, so i'm not looking into aftermarket.
Old 01-26-2008, 07:17 AM
  #242  
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I'm about to change my tranny fluid but I need help deciding what product to use. I drive my car year round so what is going to be good at temps from 0F to a 90F summer day?
Old 02-05-2008, 10:54 PM
  #243  
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to get this straight...the first post says to use this:
Transmission API GL-4,Viscosity SAE 75W-85
Differential API GL-5, Viscosity SAE 80W-90

But ppl are using 75w-90 for the tranny and diff? Also, what exact Redline products do I need to purchase? Can someone link me...there are just so many different products.
Old 02-06-2008, 09:24 AM
  #244  
dmroberson
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I called Redline and they recommended blending 2 qts of MTL (70w80) with 2 qts of MT-90 (75w90) for the transmission. They also recommended getting 2 qts of 75w90 for the differential.

Originally, I was gonna get the 75w90NS because I have a Base Z, and didn't need the friction modifier for LSD, but they said that this modifier will help keep the temp in the diff lower, so they recommended getting 75w90 instead of the NS.

Here's a link to their site.

http://www.redlineoil.com/products_gearlubricants.asp
http://www.redlineoil.com/products_g...p?categoryID=7
Old 02-06-2008, 09:52 AM
  #245  
litlechina
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Originally Posted by dmroberson
I called Redline and they recommended blending 2 qts of MTL (70w80) with 2 qts of MT-90 (75w90) for the transmission. They also recommended getting 2 qts of 75w90 for the differential.

Originally, I was gonna get the 75w90NS because I have a Base Z, and didn't need the friction modifier for LSD, but they said that this modifier will help keep the temp in the diff lower, so they recommended getting 75w90 instead of the NS.

Here's a link to their site.

http://www.redlineoil.com/products_gearlubricants.asp
http://www.redlineoil.com/products_g...p?categoryID=7

thanks a lot!! Is everyone else using these fluids? Do most prefer redline over amsoil or royal purple? thanks for the help
Old 02-06-2008, 02:02 PM
  #246  
dmroberson
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No problem. I'm not sure what is used most often. I do hear more about Redline oils being used than the others though...
Old 02-06-2008, 02:20 PM
  #247  
Dave 90TT
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I use Amsoil, and they have a specific product, that you don't have to mix two different viscositys together. Check their website for which one it is.
Old 02-06-2008, 09:08 PM
  #248  
Monsta
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Originally Posted by Accordaleer
Would new fluid in the diff, help it lock up better? Just curious, I dont autoX, so i'm not looking into aftermarket.


Correct me if I am wrong...

Our LSDs are encased inside a housing INSIDE the diff carrier. The gear oil and the LSD oil does not mix. To change the LSD oil you will have to remove the carrier cover to get to the inner case.

Last edited by Monsta; 02-07-2008 at 12:55 AM.
Old 02-10-2008, 09:17 PM
  #249  
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Has anyone tried the Lucas synthetic gear oil in the tranny? It's readily available in my area.
Old 02-11-2008, 11:20 AM
  #250  
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Thanks for the write up. I just changed my Diff fluid over the weekend with Lucas Synthetic.
Old 03-26-2008, 07:35 PM
  #251  
Swiffer
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Thanks for the writeup VO!! I'm just over 20k on my car, so I might be doing this over the summer.
Old 03-26-2008, 09:20 PM
  #252  
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I have all of my Redline fluids sitting in the garage. I'll swap the MT and diff oils when I get a chance.
Old 03-27-2008, 06:17 AM
  #253  
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Originally Posted by camaro194
Thanks for the writeup VO!! I'm just over 20k on my car, so I might be doing this over the summer.
NP.
Old 03-30-2008, 03:55 PM
  #254  
lbz
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Default Just did mine

Originally Posted by WhiteNoiz
Just thought I would report back. Great thread, made it much easier! The hardest part was trying to get it all jacked up without using the front jack points, cause they suck. I drove up a pair of ramps, used the center jack point and a hydrolic jack to lift the front, worked GREAT. I put a couple jack stands on each side of the jack under some metal supports to be safe. Used a second hydrolic jack (just happen to have 2) to raise the back using the "pumpkin", placed some jack stands on the rear jack points (they dont suck) and lowered the car down on the rear jack stands. I made sure the car was level. I used 2x4 between my hydrolic jacks and the car so there was no damage to the car. I had to use a shot hammer to break free the drain, and fill plugs for the tranny and the diff.

Tranny took about 3.5qts
Diff took 1.5qts

Result:
Much smoother shifting, and it may be in my head, but clean fluids clear down the drivetrain made the car feel faster, less resistant.

Thanks all!
I just did mine and was curious about the tranny capacity. It took just under 3.5 in before dribbling out. The diff took just under 2. I used the MotylGear 75/90 by Motul , good for GL4 and GL5. Good pics in this thread, particularly the jack points people have used.
Old 04-10-2008, 07:06 PM
  #255  
Swiffer
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Got my fluids in the mail today. I went with the suggestions made earlier in the thread.

All Redline products. Approx $65 shipped. Not bad.

Differential -
2 qts. 75w90 Synthetic Gear Oil (GL-5)

Transmission -
2 qts. MTL 70w80 (GL-4)
2 qts. MT-90 75w90 (GL-4)

I also went out and purchased a new socket set for the 10mm hex.

A bit of advice for you guys out there. I was able to find a Siphon Pump at Walmart for around $3. Its 6 ft in length and has a pump mid-hose that gets the oil moving and lets gravity do the rest. I tested it out with some water, and it seems like it will work fine. Just need to have a second person around to hold the one end of the hose down in the bottle.

I'll be doing this in a month or so once the oil is due for the next change.
Old 04-10-2008, 07:38 PM
  #256  
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Where did you purchase the items If you dont mind me asking?
Old 04-11-2008, 03:48 AM
  #257  
Swiffer
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Originally Posted by johzp
Where did you purchase the items If you dont mind me asking?
Jegs. I compared them to a few other retailers, and the other ones were either more expensive or did not have the exact weights I needed.

Oh, and a free hat was thrown in the box haha
Old 04-14-2008, 08:11 PM
  #258  
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Would there any noticeable improvement on my 29k mile Z Touring switching to redline diff fluid ?
Old 04-20-2008, 06:36 PM
  #259  
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Guys, according to the Manual, only Nissan's "J" differential fluid should be
used, or the warranty goes down the drain. Any comments? The Manual also
states that ANY other fluid will actually cause damage to moving parts. My
beast has an AT, so I have to find out about the auto tranny fluid it requires
(only 14k on my Zed, so it'll be a while before that). Keep us posted!
Old 04-21-2008, 04:02 AM
  #260  
Swiffer
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Originally Posted by j.arnaldo
Guys, according to the Manual, only Nissan's "J" differential fluid should be
used, or the warranty goes down the drain. Any comments? The Manual also
states that ANY other fluid will actually cause damage to moving parts. My
beast has an AT, so I have to find out about the auto tranny fluid it requires
(only 14k on my Zed, so it'll be a while before that). Keep us posted!
Copied straight from the manual:

Differential gear oil — — — API GL-5, Viscosity SAE 80W-90*6
Manual transmission gear oil — — — Genuine NISSAN Manual Transmission Fluid (MTF) HQ Multi 75W-85 or API GL-4, Viscosity
SAE 75W-85 or 75W-90

*6: For hot areas, viscosity SAE 90 is suitable for ambient temperatures above 32°F (0°C).


This is what they have noted regarding the automatic transmission fluid:
Using automatic transmission fluid other than Genuine NISSAN Matic J ATF will cause deterioration in driveability and automatic transmission
durability, and may damage the automatic transmission, which is not covered by the NISSAN new vehicle limited warranty.

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