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2014 Differential Fluid Change

Eddie 70

By Eddie 70
in Engines & Drivetrain

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07Softail Senior Enthusiast

07Softail

Posted
Posted

For the rear, 9.5" is 2.59 quarts, 9.75" is 2.75 quarts

Wow and it's literally the same housing except the 9.76 has larger pinion bearings and the larger ring gear difference. the rest of the parts are all the same. Crazy LOL

 

RT

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Eddie 70 Senior Enthusiast

Eddie 70

Posted
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Posted

So I just reread the thread and saw where

 

For the rear, 9.5" is 2.59 quarts, 9.75" is 2.75 quarts

 

So I am rereading the thread again tonight. I must have misread it yesterday. My picture clearly shows 9.5 and that should be 2.6 quarts. I am over by more than I thought.

 

I drove the truck to the dump and around town today. It seems to be much smoother and more quiet with the new differential fill. I should have done this earlier. I'll find me a solo cup and pull some of the fluid out tomorrow.

sdeeter19555 Senior Enthusiast

sdeeter19555

Posted
Posted

One thing to keep in mind is that the center chunk isn't typically symetrical...if you catch one right, the amount of fluid you can squeeze in will vary. That's why they spec a capacity...but I doubt filling it to the fill hole would cause any grief.

 

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Eddie 70 Senior Enthusiast

Eddie 70

Posted
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.04" below the hole is good enough for me. Thanks for posting those pics GoneFishing.

 

I just ran out and got my owners manual to check. I never saw that when I was thumbing through it.

sdeeter19555 Senior Enthusiast

sdeeter19555

Posted
Posted

The thing that puzzles me is that all of these vehicles should be checked out by the receiving dealer as part of that prep charge...

 

I know my 2012 was a quart low on trans fluid when I bought it, and that's an easy check item. And I think I was charged $300 for that prep charge.

 

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Eddie 70 Senior Enthusiast

Eddie 70

Posted
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Fyi, corvette guys are reporting some of them are underfilled from the factory. Ridiculous

 

http://www.corvetteforum.com/forums/c7-tech-performance/3921559-new-grand-sport-rear-diff-was-4-ounces-underfilled.html

You see the pics from my drain. I'm not sure what the previous owner did but I would guess, nothing back there. So it came from the factory short on mine also.

 

I made a 790 mile trip yesterday and today. The trucks rear end is quite and smooth still. I wish I had done this earlier.

sdeeter19555 Senior Enthusiast

sdeeter19555

Posted
Posted

You see the pics from my drain. I'm not sure what the previous owner did but I would guess, nothing back there. So it came from the factory short on mine also.

 

I made a 790 mile trip yesterday and today. The trucks rear end is quite and smooth still. I wish I had done this earlier.

Is there a change interval on the rear diff?

 

I find it funny that they have a drain plug on the 9.25 and 10.5 in my 2500, but no scheduled maintenance for either.

 

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Eddie 70 Senior Enthusiast

Eddie 70

Posted
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Is there a change interval on the rear diff?

 

I find it funny that they have a drain plug on the 9.25 and 10.5 in my 2500, but no scheduled maintenance for either.

 

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Steve I could find no interval mentioned in the owners manual. Change out is owner preference. There is no drain plug on my 1500 series. Still it was pretty easily done.

powerhaulic Enthusiast

powerhaulic

Posted
Posted

That's another reason not to own a 1500...

 

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Then go back to the 2500 forum

Eddie 70 Senior Enthusiast

Eddie 70

Posted
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Posted

What fluid did you use? I used Mobil 1 LS on my 04, 08 both with G80 lockers never had a issue. Now ive read not to use it due to LS additive. Any ideas

 

 

I had two old quarts of Mobil 75w90 I used along with one new quart of the same.

  • 4 months later...
afireinside7444 Enthusiast

afireinside7444

Posted
Posted

Ok so i finally got to doing 4x4 fluids at 32k miles. I used all M1 ATF and 75W90. Rear diff was black black and watery thin, gear looks good but is it odd that the magnet was in the bottom of the diff housing? Im used to it being on the back of the cover. Front diff was a mucky dark grey still pretty thick little bit of shavings on the mag. Abd transfer case was still bright red but a ton of shavings on the mag.

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