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wanting 9.75 rear end

Old 03-28-2019, 06:55 AM
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Originally Posted by mikeinatlanta
I'd go salvage yard 3.73 in order to get the 9.75" diff., but there are additional concerns going this way.
Different drive shaft length.
Possibly different parking brake.
This is the way I went. The driveshafts are less than 1/4” difference with the 8.8 shaft being the longer one.
Old 03-28-2019, 11:23 AM
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Default 8,8 with 3.73

Originally Posted by pb65stang
What year is your truck, and what engine? Not to beat a dead horse, but many of us here are under the impression that any 15+ w/ 3.73s has the 9.75". I've looked at a lot of 15+ F-150s and never seen 3.73s in an 8.8 from the factory.
Not all 3.73 are 9.75, I have 2108 XLT SuperCab 2.7 with 3.73 locking and 8.8. Only way to get 9.75 with 2.7L was HDPP, but then no 302a.
Old 03-28-2019, 11:26 AM
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I just picked up my 2019 5.0L with 3.73 gears. Has the 9.75 rear end. I was told that checking the 3.73 box would get me that rear end. First thing I looked at when I took delivery.

EDIT - Does anyone have pictures of a factory 3.73 setup on an 8.8? I know this can be done aftermarket...
Old 11-21-2021, 08:33 PM
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Default might have an axle for you

I know this discussion is old but I have a take off rear axle in awesome condition (3000 miles). It is off a 2021 - 9.75, 3.73 e locker, electronic brakes, but there is a good possibility it would fit your truck. Check out the classifieds in the 2021 for sale if you are in the bay area.


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