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Should I replace 13 year old gear oil?

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Old 03-14-2023, 06:43 PM
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Default Should I replace 13 year old gear oil?
I replaced my 2004 Ram 3500 driveline fluids at 10K in 2010. The truck now has about 33K on it. So about 23K on the fluids. About 1/2 towing. The fluids have been in there 13 years. Is it time to replace them just based on the length of time they have been in?

They are Amsoil or Mobil 1 depending on the location.
 
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Old 03-15-2023, 07:43 AM
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Why not? Won't hurt anything.
 
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Old 03-15-2023, 09:59 AM
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Considering that you've been towing with it, I'd go ahead and do it.
 
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Old 03-15-2023, 03:03 PM
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I would change it. That's quite a long time for the fluids to be in there.
 
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Old 03-16-2023, 06:34 AM
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That is kind of what I thought too! Not sure why they would go bad but it does seem like a long time.
 
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Old 03-16-2023, 08:31 AM
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Originally Posted by PaBiker
That is kind of what I thought too! Not sure why they would go bad but it does seem like a long time.
It's more of a thing to do for the peace of mind, plus you can see what the fluid is looking like.
 
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Old 03-16-2023, 10:41 AM
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Condensation will introduce moisture in your fluid over years, if you live in an environment with temperature swings. I'd just put some factory spec gear oil in there, since those rear ends will go 300K + miles with simple maint.
 
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