Getting ready to change the rear diff fluid on my 05 - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 01-26-2014
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Getting ready to change the rear diff fluid on my 05

Hey guys i am getting ready to change all my fluids. I have a few questions about the rear diff. At my work (advance auto) our computer says that it takes 75-140 gear oil, with a Limited slip additive. The additive is only necessary with a LS diff correct? The computer basically calls for it no matter what. Also when searching online i see some people saying to use 80-90 i think. So what is the PROPER fluid to put in this

Truck is a 05 4.0 with a 8.8 4.11 open rear end
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Old 01-28-2014
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When I changed my diff fluid I put 80w-90 in it with the limited slip additive, yes it is only necessary for a limited slip diff but it wont hurt if you don't have limited slip. The manual that came with my truck said 80w-90 with the additive. Mines an 00 but it should be the same since the axles are the same. Go by what your owners manual says.
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Old 01-28-2014
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Okay. I will check out my manual. Thanks for the input
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Old 01-28-2014
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Okay. I will check out my manual. Thanks for the input
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Old 01-28-2014
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yeah its 80W90 and you don't "need" LS additive for your open carrier but you can throw it in there if you want to.

btw, its 4.10 not 4.11
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