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1980 f100 9' alxe spines 28 or 31

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Oz Econoline/F100

1980 f100 9' alxe spines 28 or 31

Hi guys do our trucks come with 28 or 31 spine axles from factory as am looking at changing them?

Gary Lewis

Re: 1980 f100 9' alxe spines 28 or 31

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Darin - I believe all of the trucks came with 31 spline axles. But there’s a remote chance that the F100’s with the 4 1/2” bolt circle axles came with 28’s. I’ll research that soonest.

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

PetesPonies

Re: 1980 f100 9' alxe spines 28 or 31

In reply to this post by Oz Econoline/F100

yeah, not sure about the newer trucks, but certainly all the older ones did. I used a 3.89 31 spine center section for my '68 1/2 CJ Mustang. It came with 31 spline.

Pete's Ponies
Mustang RUSToration & Performance

1982 F100 Flareside
1983 Bronco