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Old March 26th, 2007, 05:43 PM   #1
love2wheel
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if anyone has a 4x4 ranger fx4, i need to know the length of the rear axle. brake rotor to brake rotor. and what gears are available in this axle. are they strong? im putting a dana 44 under the front on my s-10 and was considering putting the ford 8.8 from a ranger in the back. wanting to run 38.5's are they strong enough?
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Old March 26th, 2007, 06:50 PM   #2
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38.5's on a 8.8 it'll work for a show rig. I'd run a 60, Corp 14 or a 10.50 Sterling.
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Old March 26th, 2007, 07:00 PM   #3
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even if you get a 31 spline 8.8 (unless you find a level II fx4 ranger they're only 28 spline) 39's are asking for a broken shaft.....you'd probably be close to being able to run it with chromo shafts, but I'd still say that a 9" would be a better choice (if you didn't want a fullwidth axle or the PITA of narrowing)
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Old March 26th, 2007, 07:45 PM   #4
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do you know of any 9 inches that are short enough to fit under an s-10 without narrowing. like you said i dont want the PITA. this is going to be 100% functional not a show vehicle. so i do need something strong. i appreciate all input. thank you!
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Old March 26th, 2007, 08:01 PM   #5
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When you say functional what do you mean?? Aka, how hard do you intend to push the truck with that tire/axle combo.

Personally, if the truck is going to be used for hard wheeling and you want to run the 39's (might as well be with only .5" diff) you've got to think about what you want to do to it.

Stock 4.3 motor, or v8?? Atlas/t-case doubler, or low R&P (or combo of both).

The reason I ask is because in all honesty you're pushing a D44 with 37's - and that's with bling shafts/carrier/U-joints in it. While it could probably survive in the sand/sloppy muck with the 39's, if you've got any type of gear reduction/motor power being sent to it on dirt/rocks you're going to be breaking stuff a lot (including R&P's - I've seen it happen). Those are heavy tires, and once you add steel beadlocks they get even heavier. If you like throttle, this makes it even worse

Additionally, many people like to run full width axles on smaller rigs when they get into a tire of that size because of the stability this provides. If it were me, I'd run what Rocky suggested. If you're going to do the swap why go through the hassle twice? Do it once and be done with it (especially since tire size typically increases every time you purchase tires). Whether you want to narrow them is up to you - again, it really depends on your desired use for the vehicle. If you plan to run a large tire and keep the truck low, you'll probably be OK......if you want to run 16" lift and 39's I'd strongly consider full width.

As for the 9" axle, look into the 66-77 bronco's - they've typically got a 9" in the rear and a 44 in the front (well, the later years do). I don't know much about whether or not these 9" housings can be fit with the 35 spline shafts or not - that'll take some research. Also, many cars from the 70's were equipped with the 9"......check over at pirate and do some research.....the 9" is one hell of an axle - but again, you probably could do a 14 bolt in the rear for cheaper (it just weighs alot more and isn't narrow)
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Old March 26th, 2007, 08:13 PM   #6
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first right now the truck had the 4.3L but is get a 360 crate motor. the truck is primarly for mud and sand, not rockcrawling. i was hoping to run 4:56 gears with 38.5" but maybe only 4:10's with 37's i really dont want to run full size axles if i can avoid it. i like to keep it somewhat "stock" appering. i dont want it to look like its slopped together if you know what i mean. i consider the dana 60 and the 14bolt but like you said there to big and to heavy. i lose my ground clearence and add weight.
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