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swapped axles-which gear oil weight?


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hey guys I'm been try to research for which gear oil weight to put in my front d44 and rear 9" ford?

 

the alldata info said use 75w-90 as standard for oem gear oil

and is the brand coastal good? because they r great cheap price for 1 gallon ($11)

edit: extra infos... there no lSD/locker added and its 4.10 gear ratio both front and rear

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Locker no locker????

 

Towing or hauling with the truck or no???

 

To give you an accurate recommendation the intended usage is needed.

um i already gave the info on first post. quoted:from first post "edit: extra infos... there no lSD/locker added and its 4.10 gear ratio both front and rear"

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If the truck is going to see regular street use I'd go with a 90w oil. If you are going to tow with it, I'd go with a 140w oil. Regardless, go with synthetics and your gears will be much happier. :thumbsup: A bit more expensive but it's not like you are changing the diff oil every 5k.

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