Ford 8.8 weird sound/Gear Problem -
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Unread 09-11-2012, 01:39 PM   #1
Registered User
1999 TJ Wrangler 
Join Date: Sep 2012
Location: Centereach, New York
Posts: 14
Ford 8.8 weird sound/Gear Problem

Just installed a Ford 8.8 that I bought bolt in ready and I'm getting a whine/rubbing sound coming from the rear. I popped off the diff cover and found that 2 teeth on the Ring gear wear ground down I'm guessing for clearance for the cross pin. I was told this is not a problem. Could this be the cause of the sound I'm hearing? I asked a local 4x4 shop and showed them a picture of the gear and they said I should be worried riding the truck as is. What do you all think?

JSR789 is offline   Reply With Quote Quick reply to this message
Unread 09-11-2012, 02:06 PM   #2
Farm Wheeler
2000 TJ Wrangler 
Join Date: Apr 2005
Location: Elkmont, AL
Posts: 10,050
When putting 4.56 or 4.88 gears in a 8.8 you have to either notch the ring gear teeth or the cross pin. Notching the teeth is what most folks do.

I don't remember how far across the top of the tooth I cut when I did mine but I don't think it went as far as yours. I don't remember the notch extending as far into the contact area as yours does.
Keep in mind that free advice can frequently be worth less than you pay for it.
mdm is offline   Reply With Quote Quick reply to this message

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