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Rear diff fluid do I need lsd additive?

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Old Jun 7, 2025 | 01:53 AM
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Default Rear diff fluid do I need lsd additive?
I have a 2019 f150 4x4 max tow package L6 axle code so e locker. Do I need the lsd additive. I got 5 quarts of the 75w85 motorcraft fluid from the dealer. From what I read i don't need it as its not lsd. Thanks
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Old Jun 7, 2025 | 06:54 AM
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nope. won't hurt though.
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Old Jun 7, 2025 | 06:57 AM
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I don't think your gonna need 5 quarts either.
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Old Jun 7, 2025 | 06:59 AM
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What does the owners manual say?
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Old Jun 7, 2025 | 10:11 AM
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Originally Posted by jkeaton224
What does the owners manual say?
manual just sates the fluid type and amount.
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Old Jun 7, 2025 | 11:43 AM
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Originally Posted by Biag
manual just sates the fluid type and amount.
Do that then.
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Old Jun 7, 2025 | 06:19 PM
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Originally Posted by Biag
manual just sates the fluid type and amount.
Yes, because that's all you need. You don't have an LSD, so no LS additive.
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Old Jun 9, 2025 | 03:29 PM
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Originally Posted by dougg
nope. won't hurt though.
This....
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