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Differential Fluid - To Change or Not to Change?

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Old 10-05-2010, 01:06 PM
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Differential Fluid - To Change or Not to Change?

Hey folks - what's the concensus on how often to change differential fluid (2004 RWD)? Upon careful reading of the Infiniti Maintenance Manual, there is no prescribed interval for changing it, so I'm reluctant to buy-in to folklore. If it needs to be changed, then why wouldn't Infiniti recommend it outright, just like they do with engine oil, filters, etc?
Old 10-05-2010, 01:15 PM
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I bought my 2004 w/ 56k miles on it and just gave it a differential fluid service at 100k miles.
Old 10-05-2010, 01:48 PM
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I changed mine at 39k, should be done every 30k on OEM fluid.

I changed mine to Amsoil SVG's fluid so Ill be changing that in 60k
Old 10-05-2010, 01:59 PM
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I've done it every 30K along with a trans flush.
Old 10-05-2010, 09:02 PM
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Did mine at 40k and it was damn dirty. The drain magnet was completely gunked up. No way would I want to let it go to 100k. I refilled with mobil 1 synthetic.


The rear differential is part of the "awd service" that Infiniti recommends for the x models every 30k I believe.



It's easy as pie to change.
Old 10-05-2010, 10:38 PM
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^ Mine was clear and the plug was relatively clean, it was a used car so I was very happy to see that.
Old 10-05-2010, 10:40 PM
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I did mine at 60K with Amsoil Severe Gear. As mentioned before, the magnet was covered in little metal fibers. I'll be doing it again at 90K, probably about this time next year.

Quote:
If it needs to be changed, then why wouldn't Infiniti recommend it outright, just like they do with engine oil, filters, etc?
Most dealerships don't do that. They'd rather wait until your transmission/diff grenades and then charge for that. Why bother with $200 preventative maintenance when they can bid their time and rape you for a couple of grand?
Old 10-05-2010, 10:53 PM
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Nobody ever recommends brake fluid be changed either......but it should be flushed every 1-2 years
Old 10-05-2010, 10:54 PM
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^ Yep or Power Steering
Old 10-06-2010, 12:10 AM
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Quote:
Originally Posted by Mustang5L5 View Post
Did mine at 40k and it was damn dirty. The drain magnet was completely gunked up. No way would I want to let it go to 100k. I refilled with mobil 1 synthetic.

The rear differential is part of the "awd service" that Infiniti recommends for the x models every 30k I believe.
I did front and rear at 60K (bought it with 40K), but neither looked all that bad. Front was still a nice gold color. Smelled like crap though. I'd forgotten how bad gear oil can smell. Replaced with Amsoil 80W-90. . Might use Severe next time.

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It's easy as pie to change.
I'd say it's easy to drain, but a pain in the **** to refill. I'm definitely finding a better way to refill it than the cheap pump I used last time.

The thing that surprised me as far as "easy as pie" was the transmission fluid. It was much easier than an oil change since you don't have to drop the bottom cover. I did 5 quarts at 60K, and I think I'll do another 5 at 65K and 70K when I do those oil changes, then start the same 3 cycle swap at 90K.
Old 10-06-2010, 02:16 AM
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I wish mine was easy as pie. I don't know how but the fill hex plug was stripped. The drain hex plug is fine so I have to order one and try to remove it.

^^^ I agree on the transmission though. Very simple.

EDIT: How did you guys do the power steering? Do you just remove the reservoir, drain and refill or?
Old 10-06-2010, 06:01 AM
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what is the best fluid? for the differential service.
Old 10-06-2010, 07:30 AM
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Quote:
Originally Posted by BuckeyeInMI View Post

The thing that surprised me as far as "easy as pie" was the transmission fluid. It was much easier than an oil change since you don't have to drop the bottom cover. I did 5 quarts at 60K, and I think I'll do another 5 at 65K and 70K when I do those oil changes, then start the same 3 cycle swap at 90K.

I agree...this is the easiest in terms of fluid replacement out of everything.



As for the refilling, I bought a decent puma from advance auto that screws onto the top of the bottle. It worked very well and made the job simple. That's why it was easy to me.
Old 10-06-2010, 09:06 AM
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Originally Posted by nightmaresedan View Post
what is the best fluid? for the differential service.
That really is a matter of opinion. I had mine changed at 40k (bought the car with 30k). I used BG Ultra Guard in my differential and I have had no complaints with it at all. Car is at 70k now and will probably change the differential fluid again within the next 10k miles or so.

Link to my thread reviewing:

http://panoramic-3d.ru/forums/drivetr...bg+ultra+guard
Old 10-06-2010, 10:14 AM
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rear end

Thinking of doing mine but not sure what is the best fluid to use be maybe just stick to oem

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2003, 2004, 2005, 2006, change, changing, differential, fluid, front, g35, infiniti, oil, rear, replace, sedan, service, transmission
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