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notched cross pin 8.8, which one?

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  #1  
Old 03-01-2008
quicksilver2001's Avatar
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notched cross pin 8.8, which one?

whats goin on guys, well im ordering my 4.56's either tonight or tomorrow from complete off-road, and they offer 2 notched pins for my front diff, ones a 3/4 notch and ones a 7/8 notch, which one should i get? they are both the same price? thanks

edit: it says the 3/4 is for the 28 spline and 7/8 is for 31 spline, now does anyone know which one the front diff has on my 02 f-150?
 
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  #2  
Old 03-01-2008
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notched cross pins = bad.

i had to grind a little bit off two of the teeth on my ring gear to get my solid cross pin in.


Edit; now that i see your talking about a front differential, idk, it helps to read haha.
 
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  #3  
Old 03-01-2008
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Yeah, most people agree that notched pins are not strong enough, especially for use with a locker. They recommend grinding a small portion of the ring gear to let the pin pass through the carrier.

Grinding does not weaken the gear at all because the gears mesh in a patter near the center and not on the egde where you need to grind.
 
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  #4  
Old 03-01-2008
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I also ground a small portion of the teeth where they block the pin from entering the carrier, well I had the shop do it anyways. One reason was because I'd read the notched pin was weak, and the main reason was because I was having the Eaton e-locker put in and you can't use a notched pin with it.

This was on my rear 8.8, but I don't see why it would be any different for the front differential.
 
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  #5  
Old 03-01-2008
zabeard's Avatar
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yeah grind the teeth
 
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  #6  
Old 03-01-2008
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On the front diff of my old truck, I didn't need to grind a little off the teeth or use a notched cross pin.....

I agree, grind some off the gear if you must
 
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  #7  
Old 03-01-2008
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Okay, follow up question: do the 8.8 31 spline rear lockers from other manufacturers use the same cross pin as the factory diff? I need to replace mine. I notched it and I'm regretting it as it is digging into the carrier.
 
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  #8  
Old 03-01-2008
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k, i guess ill use my stock cross pins and just grind the gears... thanks for the input.
 
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  #9  
Old 03-01-2008
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Originally Posted by n3elz View Post
Okay, follow up question: do the 8.8 31 spline rear lockers from other manufacturers use the same cross pin as the factory diff? I need to replace mine. I notched it and I'm regretting it as it is digging into the carrier.
Yes
 
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  #10  
Old 03-01-2008
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Super. I have a spare open carrier here. I'll try that pin. Thanks, Maurice.
 
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  #11  
Old 03-01-2008
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Originally Posted by n3elz View Post
Super. I have a spare open carrier here. I'll try that pin. Thanks, Maurice.
Just make sure the open carrier is a 31 spline carrier.....the 31 spline uses a larger diameter cross pin than the 28 spline
 
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  #12  
Old 03-01-2008
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Yes, I saw that: 7/8" for the 31 spline, 3/4" for the 28 spline. The one I have is a 31 spline.
 
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  #14  
Old 03-01-2008
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Just checked: same diameter but the ECTED's cross pin and the 8.8 carrier I have can't be exchanged. The anchor bolt is in a different place: it's towards the end of the Ford pin, and the center of the ECTED pin.
 
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  #15  
Old 03-01-2008
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Originally Posted by 04 EDGE View Post
< notched the ring gear. no problems, rather have a solid cross pin.
Back when I put this in, I was nervous about notching the gears, but now I wish I had, lol. Live and learn.
 
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  #16  
Old 03-01-2008
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ive got a spare stock pin if somebody wants it..just pay shipping should be much for a padded envelope..
 
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  #17  
Old 03-01-2008
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i also have a stock cross pin. im runnin a notched one in my rear diff, if the rear end explodes its just another reason for a 9"
 
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  #19  
Old 03-01-2008
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Originally Posted by 04 EDGE View Post
john, i only had to grind a TINY bit off the ring gear. nothing to worry about.

and this was a brand new ring gear, 4.56.
Yeah, that's what I have: 4.56. I'll order another pin from Auburn.
 
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  #20  
Old 03-03-2008
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Update on my thread hijack, lol: I just talked to Auburn and they're sending me a pin for free. Great customer service over there. If you call Auburn, hit "1" on the phone and talk to Nancy, and she'll consult with an engineer named Jamie or Jamey about it. Very helpful and agreed the documentation I received was wrong. It's a small crew for Automotive Products support over there, which tells me that they don't get too many calls to deal with probably. That's a good thing.

If the pin isn't enough to remedy it, I'll get back to them.
 
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  #21  
Old 03-03-2008
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glad you got it taken care of John.....customer service like that is worth paying the extra $$ for!
 
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  #22  
Old 03-03-2008
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Well from past experience I found using the right pin works the best!

I'm just messin with you ****-***!

P.S.- Why is C O O N blocked out? lol
 
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  #23  
Old 03-03-2008
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[sung to "I Was in the Right Place (But It Must Have Been the Wrong Time)"]

I know I used the right pin -- but it must have been the wrong grind.
I put it in the right diff -- but it just didn't quite align.
I know I did a good install -- but I should have ground the tooth off.
I heard from Andy Roach now -- but you know he's just a ****-off... [oops...]
 
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  #24  
Old 03-03-2008
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lol
 
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  #25  
Old 03-03-2008
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Really just kidding, Andy! That just came to me and I had to roll with it, lol.
 
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