Need outer diameter of 4:56 cross pin/shaft. - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 03-12-2008
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Need outer diameter of 4:56 cross pin/shaft.

Hi All,

I'm getting ready to install my gears but I need to get the special cross pin/shaft for the 4:56's. My question is there are two types of them. One is bigger then the other so the place I'm buying it at is asking me which diameter I want. Does anybody know if I use the bigger pin or the smaller one? Anyone know the diameter of the stock one in the rangers?

Thanks in advance.

Rob
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Old 03-12-2008
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Anybody know the diameter of the 8.8?? Anyone? I know someone knows this :P

I have 2 choices:

1. 3/4ths (3 quarters)

2. 7/8ths (7 eighths)

They came out with both of these for the 8.8 so anyone know what it would be for an 04 ranger 8.8 differential? I can't start on my gear install until I get this cross shaft :(
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Old 03-12-2008
04 EDGE
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you dont need a new cross pin, just grind a little off the ring gear till the solid pin goes in.

this is what i did, had to grind a very small amount off just one tooth
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Old 03-12-2008
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28 spline uses the 3/4" pin

31 spline uses 7/8"
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Old 03-12-2008
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Quote:
Originally Posted by 04 EDGE View Post
you dont need a new cross pin, just grind a little off the ring gear till the solid pin goes in.

this is what i did, had to grind a very small amount off just one tooth
I'm not doing the actual install though :( Having it done professionally...
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Old 03-12-2008
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Quote:
Originally Posted by gumby View Post
28 spline uses the 3/4" pin

31 spline uses 7/8"
EXACTLY what I needed!!!
Thank you gumby
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Old 03-12-2008
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Notched pins are weak. Like 04 EDGE said, grind the ring gear and you will be able to use the much stronger factory pin. If a professional is installing the gears they should be aware of this problem and solution. If the pro doesn't know what you're talking about when you ask about it, find someone else.
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Old 03-12-2008
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I personally had a bad experience with a notched pin. I've now replaced it and ground a bit off the gear tooth. No noise and an Auburn engineer told me it's really the preferred solution since the part you grind isn't in contact of a significant part of the tooths overall strength in service if your pattern is correct when you set the gears up.

Shouldn't your "professionals" have been able to determine the pin you need?
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Old 03-12-2008
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Quote:
Originally Posted by n3elz View Post
I personally had a bad experience with a notched pin. I've now replaced it and ground a bit off the gear tooth. No noise and an Auburn engineer told me it's really the preferred solution since the part you grind isn't in contact of a significant part of the tooths overall strength in service if your pattern is correct when you set the gears up.

Shouldn't your "professionals" have been able to determine the pin you need?
Yeah they should of been able to determine what it was but between both of them they didnt know which one I needed. I don't think they are going to take the factory pin and grind it but I really don't know enough about auto mechanics to do it myself :(
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Old 03-12-2008
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you dont grind the factory pin, you use the factory pin and you grind a hair off of one or two teeth of the ring gear which allows the factory solid pin to just slip by and into the carrier.
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Old 03-12-2008
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You don't grind the factory pin. You grind the ring gear itself. If the 'professional' doesn't know what to do or understand what you're talking about then take it to someone else. Any mechanic who's installed gears for a long time and is good at what they do will be aware of this situation.

Trust me it will be much more costly in the end if that notched pin fails you.
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Old 03-12-2008
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Quote:
Originally Posted by RazorsEDGE View Post
You don't grind the factory pin. You grind the ring gear itself. If the 'professional' doesn't know what to do or understand what you're talking about then take it to someone else. Any mechanic who's installed gears for a long time and is good at what they do will be aware of this situation.

Trust me it will be much more costly in the end if that notched pin fails you.
Damn, I've only been able to find one place out here in OC (california) that can do it for me. I need to find some hole in the wall shop that will get down on it for me. I wish I could just do the damn thing myself but when it comes to auto im so lost
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