Diff Fluid?

[REX111]

Just got my new diff cover. what diff fluid would you suggest? I was thinking 75w-110, but unsure what brand would be good.

 

[JohnyPython]

Amsoil gear 75w90

 

[nikhsub1]

I used redline 75w85...

 

[Badgertits]

I used amsoil 75w90 w/ ford performance diff, filled it to the top hole, did this @ 20k....realistically probably shouldn’t have to do it again, but w/ the easy drain diff probably will every 30k

gives excuse for rooster tails/burnouts

 

[Traffic22]

I used amsoil 75w90 w/ ford performance diff, filled it to the top hole, did this @ 20k....realistically probably shouldn’t have to do it again, but w/ the easy drain diff probably will every 30k

gives excuse for rooster tails/burnouts

Is your truck lifted? I’m not 100% certain, but I recall seeing a video, and reading here bottom hole was for stock height, top for lifted.

Curious about the correct method, because I’m about to do mine.


Sent from my iPad using Tapatalk

 

[nikhsub1]

Is your truck lifted? I’m not 100% certain, but I recall seeing a video, and reading here bottom hole was for stock height, top for lifted.

Curious about the correct method, because I’m about to do mine.


Sent from my iPad using Tapatalk

I believe you are correct - more oil in the diff is not a good thing.

 

[Traffic22]

I believe you are correct - more oil in the diff is not a good thing.

And no friction modifier correct?


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[nikhsub1]

And no friction modifier correct?


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Correct.

 

[bpetty13]

Is your truck lifted? I’m not 100% certain, but I recall seeing a video, and reading here bottom hole was for stock height, top for lifted.

Curious about the correct method, because I’m about to do mine.


Sent from my iPad using Tapatalk

Yep you’re correct. Top hole is for lifted trucks and bottom hole is for stock height.

 

[Badgertits]

Is your truck lifted? I’m not 100% certain, but I recall seeing a video, and reading here bottom hole was for stock height, top for lifted.

Curious about the correct method, because I’m about to do mine.


Sent from my iPad using Tapatalk

Too much won’t hurt that’s why they have burp valves


Too little? That’s another story