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Old 04-25-2011, 09:46 PM
Teg360 Teg360 is offline
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Default axle spline question

ok i have a 2002 fx4 and from what i am reading i have a 31-spline axle. my axle code says i have 4.10s and a open diff. so my question is do i still have a 31 spline or do i have a 28 spline?
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2002 Ranger Xlt Ext. Fx4
Mods: AEM Brute Force air intake, Throttle body spacer, dual exhaust, leveling kit, 3in body lift, 15x8 black pacer rims wrapped with 33x12.5xr15 Goodyear Wrangler Duratracs, Hella 500 offroad lights, cobra cb with wilson 1000 antenna, Sony head unit, 500 watt amp with 12inch sub.
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Old 04-25-2011, 09:46 PM
doyouquaxu doyouquaxu is offline
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Default Re: axle spline question

28
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Old 04-25-2011, 09:50 PM
Teg360 Teg360 is offline
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Default Re: axle spline question

damn ok
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2002 Ranger Xlt Ext. Fx4
Mods: AEM Brute Force air intake, Throttle body spacer, dual exhaust, leveling kit, 3in body lift, 15x8 black pacer rims wrapped with 33x12.5xr15 Goodyear Wrangler Duratracs, Hella 500 offroad lights, cobra cb with wilson 1000 antenna, Sony head unit, 500 watt amp with 12inch sub.
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Baby steps.
I think we made good progress today.
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Old 04-25-2011, 10:10 PM
Teg360 Teg360 is offline
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Default Re: axle spline question

one more question do i have the 3/4 axle shaft?
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2002 Ranger Xlt Ext. Fx4
Mods: AEM Brute Force air intake, Throttle body spacer, dual exhaust, leveling kit, 3in body lift, 15x8 black pacer rims wrapped with 33x12.5xr15 Goodyear Wrangler Duratracs, Hella 500 offroad lights, cobra cb with wilson 1000 antenna, Sony head unit, 500 watt amp with 12inch sub.
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Baby steps.
I think we made good progress today.
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Old 04-25-2011, 10:25 PM
FX4OR FX4OR is offline
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Default Re: axle spline question

if it is a factory 2002 FX4 truck, it has a 31 spline torsen 8.8 rear end. the door jamb sticker would say axle code R7 if this is the case. anything else is a 28 spline, including the XLT 4x4 'off road package' model
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Old 04-26-2011, 12:10 PM
Teg360 Teg360 is offline
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Default Re: axle spline question

my axle code is 97 so then i have the 28 spline right
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2002 Ranger Xlt Ext. Fx4
Mods: AEM Brute Force air intake, Throttle body spacer, dual exhaust, leveling kit, 3in body lift, 15x8 black pacer rims wrapped with 33x12.5xr15 Goodyear Wrangler Duratracs, Hella 500 offroad lights, cobra cb with wilson 1000 antenna, Sony head unit, 500 watt amp with 12inch sub.
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Baby steps.
I think we made good progress today.
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Old 04-26-2011, 03:28 PM
STL STL is offline
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Default Re: axle spline question

You can check if it is or not my measuring the end of the axle shaft.



an easy check that can be done without referring to axle tags or markings. Measure the diameter of the axle tube between the spring perch and the diff housing. A 31-spline Level II axle tube is about 3 1/4" diameter and a non-LII is something like 3".

If you don't have a caliper or micrometer handy to measure the diameter, wrap a string around the tube and mark the circumference. Then transfer the string measurement to a tape or rule.

A 31-spline should be about 10 1/4"
A 28-spline should be about 9" ~ 9 1/2"

----------

Also this will help
Quote:
The second tag is a dead give away, yes. But if the tags are gone, you can visually identify it as well...without pulling the cover off the axle. Take a peek at the end of the axle housing on the backside of the brake flange....

Take a look at these pics....

28spline


31spline (note the pretty decent step down)


The bearings outer diameter is the same between 31spline and 28spline. To make up the difference, the size of the axle tube diameter is visually stepped down compared to a 28spline.

Also, if you see the donor vehicle, you can pretty much figure it out. 2002 Fx4, 2003+ Level II, select 08-09 Fx4's. Axles are super rare...hell the trucks are super rare period.
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Last edited by STL; 04-26-2011 at 03:27 PM.
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Old 04-26-2011, 03:30 PM
Teg360 Teg360 is offline
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Default Re: axle spline question

alright i will have to do that
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2002 Ranger Xlt Ext. Fx4
Mods: AEM Brute Force air intake, Throttle body spacer, dual exhaust, leveling kit, 3in body lift, 15x8 black pacer rims wrapped with 33x12.5xr15 Goodyear Wrangler Duratracs, Hella 500 offroad lights, cobra cb with wilson 1000 antenna, Sony head unit, 500 watt amp with 12inch sub.
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Originally Posted by Ranger Sport View Post
Baby steps.
I think we made good progress today.
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