Swapping Rear ends

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Apr 30, 2020 | 04:59 PM

Alexei M

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Swapping Rear ends

Hi all. my question is this: Is it possible to switch out a 9.75 ring gear 3.31 ratio rear end to a 8.8 ring gear 3.31 ratio rear end on a 4wd F-150 without damage to the truck? I appreciate the feedback.

Apr 30, 2020 | 05:17 PM

glc

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From: Joplin MO

Maybe. It WILL require a whole rear axle assembly, you can't just swap the pumpkin.

You need to post more details on your truck - year, model, engine, etc.

Apr 30, 2020 | 05:28 PM

Roadie

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From: Wilmington,NC

I would worry about the driveshaft mating with the smaller diff. Perhaps the driveshafts are the same. I don't know.

Apr 30, 2020 | 08:48 PM

glc

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From: Joplin MO

Not only that, but there's the issue of rear brake and spring/shock mount compatibility. Ford put a 9.75 in your truck for a reason, the 8.8 is not as heavy duty.

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