Differential Pinion Nut Size

Does anybody know the differential pinion nut size on the 2013 GT500's?


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Are you looking for thread size or socket size?

Kit - Nut & Spacer - Ford (AR3Z-4C121-A)

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Snoopy49 said:

Are you looking for thread size or socket size?

Kit - Nut & Spacer - Ford (AR3Z-4C121-A)

Click to expand...

Socket size. I need to tighten it


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I don't know the size, hopefully someone will chime in. Are you using a new nut?

Snoopy49 said:

I don't know the size, hopefully someone will chime in. Are you using a new nut?

Click to expand...

Nope, I'm using the old one


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Differential Ring And Pinion - New.pdf

Page 17

NOTICE: This operation disturbs the pinion bearing preload. Install a new pinion nut with the same color as the original if not replacing the collapsible spacer. If a new collapsible spacer is installed, install the pinion nut in the kit or damage to the component may occur.

Using the Drive Pinion Flange Holding Fixture to hold the pinion flange, remove and discard the pinion nut.