Rear End Info

[Goose350]

My axle code is 3L and that means its is 3.73 with Limited Slip. Correct?

If so, what brand fluid are y'all using to change it out and what about the friction modifier? Thanks

[Goose350]

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[03-blue-Powerstroke]

I don't know what the code means but I used Royal Purple synthetic and 4oz of friction modifier. I have 3.73s with limited slip

[Goose350]

Did you get the modifier from ford?

[03-blue-Powerstroke]

No, I got it at NAPA. They even sell it in a 4 oz tube so you just shoot the whole thing in.

[Goose350]

Thanks for the info.

[CoalRollinRoosterCruiser]

it the code on the rear end tag is 3l 73, then its limited slip 3.73.

Originally Posted by 03-blue-Powerstroke

I don't know what the code means but I used Royal Purple synthetic and 4oz of friction modifier. I have 3.73s with limited slip

Royal Purple already has the modifier in it.

You definitely have wayy to much modifier in it now. Which means your limited slip, WILL NOT work correctly

[03-blue-Powerstroke]

Originally Posted by CoalRollinRoosterCruiser

it the code on the rear end tag is 3l 73, then its limited slip 3.73.





Royal Purple already has the modifier in it.

You definitely have wayy to much modifier in it now. Which means your limited slip, WILL NOT work correctly

The kind I bought had no friction modifier. Then again I did this 2 years ago so it might of changed

[CoalRollinRoosterCruiser]

Originally Posted by 03-blue-Powerstroke

The kind I bought had no friction modifier. Then again I did this 2 years ago so it might of changed

If you bought the right weight for our rear ends, it has the friction modifer in it.

At least it does now

[Goose350]