Drivetrain Questions and info regarding transmissions, clutches, etc.

Changed rear differential fluid, SLUDGE on the megnet?

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Old Apr 5, 2007 | 01:08 PM
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Changed rear differential fluid, SLUDGE on the megnet?

First, dear god: Please forgive me if I have posted this in the wrong area. I realize the mods will strike down with the force of 1045 elephants and move this thread at the speed of light, but please forgive me

91,000 miles on my G, and I don't think the rear differential fluid has ever been changed. I got the car at 50k, and haven't done it, and I doubt the last owner did (it was a corporate lease vehicle).

So as you probably know, attached to the drain plug is a magnet to catch any metal shavings. I could NOT believe the amount of black/gray sludge on there. I'd say it was almost 2mm thick ALL around.

Is this normal? My PLAN is to run with this fluid in for 5000 miles, and replace it again.

I will have pics soon, waiting for the camera to charge up
 
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Old Apr 5, 2007 | 02:58 PM
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Normal and not a cause for concern with that kind of mileage. Most of that wear occured during break-in. There is no need to change the oil in 5K miles.
 
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Old Apr 5, 2007 | 05:57 PM
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Originally Posted by DaveB
Normal and not a cause for concern with that kind of mileage. Most of that wear occured during break-in. There is no need to change the oil in 5K miles.
I am thinking that this fluid will get dirty quickly from whatever remains in the case. You know, kinda like rinsing it out? It's cheap enough (and I didn't get Amsoil, it's an excuese to find it )
 
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Old Apr 5, 2007 | 06:17 PM
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Originally Posted by G35 Mass
First, dear god: Please forgive me if I have posted this in the wrong area. I realize the mods will strike down with the force of 1045 elephants and move this thread at the speed of light, but please forgive me
Hahahahahaha
 
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Old Apr 5, 2007 | 06:28 PM
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I am almost at the 50k mark and am think about doing this how much fluid did it take if you remember
 
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Old Apr 5, 2007 | 06:38 PM
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Originally Posted by CruisnGcoupe
I am almost at the 50k mark and am think about doing this how much fluid did it take if you remember
Officialy it's 1.4 liters, which is a little less than 2 bottles. That being said, the fill hole is in a spot that doesn't allow you to tip the bottle downward at all, and was a HUGE pain to get it full, and included spilling some. Next time, I will get three bottles, and keep topping off the bottles to be able to fill it easily. Also, the fill isn't measured in volume: It's considered full when it starts dripping back out of the fill hole a little.
 
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Old Apr 5, 2007 | 06:45 PM
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Originally Posted by G35 Mass
Officialy it's 1.4 liters, which is a little less than 2 bottles. That being said, the fill hole is in a spot that doesn't allow you to tip the bottle downward at all, and was a HUGE pain to get it full, and included spilling some. Next time, I will get three bottles, and keep topping off the bottles to be able to fill it easily. Also, the fill isn't measured in volume: It's considered full when it starts dripping back out of the fill hole a little.
Get an oil pump from Amsoil. I did my manual transmission and rear diff a few weeks ago, used the $11.00 oil pump going into the side fill holes and didn't spill a drop. Works like a champ. The pump screws right onto the Amsoil transmission fluid bottles.
 
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Old Apr 5, 2007 | 07:07 PM
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Originally Posted by twin_snails
Get an oil pump from Amsoil. I did my manual transmission and rear diff a few weeks ago, used the $11.00 oil pump going into the side fill holes and didn't spill a drop. Works like a champ. The pump screws right onto the Amsoil transmission fluid bottles.
Are you saying that you didn't use Nissan J-Mattic tranny fluid?

Let us know how that works out for you. Nissan/Infiniti is WAY too persistant about using that for me to be brave enough to try anything else....
 
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Old Apr 5, 2007 | 09:28 PM
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Originally Posted by G35 Mass
Are you saying that you didn't use Nissan J-Mattic tranny fluid?

Let us know how that works out for you. Nissan/Infiniti is WAY too persistant about using that for me to be brave enough to try anything else....
J-matic is only required for auto trans
 
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Old Apr 5, 2007 | 09:45 PM
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Originally Posted by LT1 SS
J-matic is only required for auto trans
roger that....
 
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Old Apr 7, 2007 | 02:20 PM
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what is the periodicity of this maintenance?
 
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Old Apr 7, 2007 | 04:30 PM
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Originally Posted by n1cK
what is the periodicity of this maintenance?
According to the service manual, it should be inspected every 15,000 miles.

Seems like most people are changing it every 30k.
 
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Old Apr 7, 2007 | 05:01 PM
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what page is that one? i'm looking right now, and i couldn't/can't find it. mayb ei'm blind. either way, i think mine is due (40k)...
 
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Old Apr 7, 2007 | 06:05 PM
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Originally Posted by n1cK
what page is that one? i'm looking right now, and i couldn't/can't find it. mayb ei'm blind. either way, i think mine is due (40k)...
MA-7 Maintenance section, periodic maint.
 
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Old Apr 7, 2007 | 08:01 PM
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got it, thanks!
 
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