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Hey. I pulled my rear end out to change the oil and inspect the diff and found pitting on the ring gear! I'm wondering how much of a problem this is. Is it ok to run it like this? Is this going to fail?
Any help with these numbers would be appreciated
Pitting is only on half of the gear. <br/>I tried to categorize this photo but the year only goes back to 1988.
Hey. I pulled my rear end out to change the oil and inspect the diff and found pitting on the ring gear! I'm wondering how much of a problem this is. Is it ok to run it like this? Is this going to fail?
Any help with these numbers would be appreciated
WDM-J = Ford 9" rear axle / 3.50-1
6AD = Assembled the 4th week (D) of January (A), 1966 (6).
Hey. I pulled my rear end out to change the oil and inspect the diff and found pitting on the ring gear! I'm wondering how much of a problem this is. Is it ok to run it like this? Is this going to fail?
I don't think anyone addressed your original questions.
That is a BIG problem.
Running it like that will put metal everywhere.
It will fail.
I'm pretty sure any 9" 28 spline will bolt right in. Although if it's not from a truck you may have to change the pinion yoke.
Try Car-Part.com--Used Auto Parts Market and set the search for your zip you may find one close by.
Last edited by Crop Duster; Mar 1, 2017 at 03:56 AM.
Reason: added
Thank you very much for your reply. It's not what I wanted to hear, but what I needed to know. If I bolt in a new ring will I have to go through all of that shimming and measuring? I don't have the instruments for that. All of the videos on inspection tell me to inspect, but don't say what to do if I find something.
Again, thank you for responding. I'll see if I can find something nearby.
I would say with that much corrosion on the ring gear that the pinion is ruined also. Your best bet is to find a good used unit and swap it out. You need to replace the ring and pinion as a set. And any time you take one apart you have to readjust everything.
I would say with that much corrosion on the ring gear that the pinion is ruined also. Your best bet is to find a good used unit and swap it out. You need to replace the ring and pinion as a set. And any time you take one apart you have to readjust everything.
Thanks again, Crop Duster
maybe I can find the unit. It's presently a 3.5:1. I was wondering if a 3.11 would give better gas mileage. There seems to be plenty of torque with the 300 six.
Ring gears can't be installed with a pinion gear from another gear set or vise-versa.
Ring and pinion gears are lapped together in matched sets at the time of manufacture.
Some gear sets are timed, some are not. It just depends on the ratio. There are non-hunting gear sets, partial non-hunting gear sets and hunting gear sets.
Information in the Ford shop manual making reference to the paint (timing) marks on the gear teeth.
Interesting stuff and something I neither knew or considered. So mine is a 3.5:1. Would that typically be hunting I hope? Thanks for the info. Much appreciated.
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would give better gas mileage.
