I have not measured it yet but my feeling is it is a 4.10 or so. Would like to get a 3.0 posi but need to know how many splines stock axles have.
Any info or pointers would be welcome. Thanks
req: 1979 F150 stock 9 inch info
Dec 04, 2005
Last reply: 20 years ago
1 Replies
460, automatic
Your truck should have 31 spline axels. Most 31 spline axels have a round counter-sunk center, as opposed to a larger Oval in the center between the lugs...
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