Re: Differential pinion seal leaking after replacing pinion seal
[Re: moparjo68]
#3040060
05/05/22 07:14 PM
05/05/22 07:14 PM
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Joined: Dec 2014
Posts: 5,812 ohio
ruderunner
master
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master
Joined: Dec 2014
Posts: 5,812
ohio
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Not unusual for the yoke to get seal cut. They make repair sleeves if it's deep.
But, could be leaking through the splines too. Or even around the outside of the seal if the housing has imperfections.
I wouldn't take it back to them if they missed these things. Good news is you can fix it yourself, there's no voodoo in a 742.
Angry white pureblood male
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Re: Differential pinion seal leaking after replacing pinion seal
[Re: Neil]
#3040207
05/06/22 08:13 AM
05/06/22 08:13 AM
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Joined: Jan 2003
Posts: 75,005 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,005
U.S.S.A.
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They can weep oil down the pinion gear splines and past the nut and washer. Most of the time it is the seal, but that is another potential leak source that gets overlooked. When the whole area is full of lube mess it can be hard to tell sometimes. Exactly , so where is it actually leaking from, behind the yoke shield or at the u joint ?
running up my post count some more .
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Re: Differential pinion seal leaking after replacing pinion seal
[Re: moparjo68]
#3040367
05/06/22 02:57 PM
05/06/22 02:57 PM
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Joined: Jan 2003
Posts: 25,786 Rio Linda, CA
John_Kunkel
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 25,786
Rio Linda, CA
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When replacing a pinion seal, some people don't pack the garter spring with grease and the spring can pop off when the seal is driven in.
The INTERNET, the MISinformation superhighway
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Re: Differential pinion seal leaking after replacing pinion seal
[Re: John_Kunkel]
#3040419
05/06/22 07:24 PM
05/06/22 07:24 PM
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Joined: Dec 2014
Posts: 5,812 ohio
ruderunner
master
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master
Joined: Dec 2014
Posts: 5,812
ohio
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This can happen to any lip seal with a spring. I've seen folks install torque converter and shove the spring into the pump!
Angry white pureblood male
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Re: Differential pinion seal leaking after replacing pinion seal
[Re: JohnRR]
#3040492
05/07/22 02:12 AM
05/07/22 02:12 AM
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Joined: Jan 2008
Posts: 486 Sonoran desert, Arizona, USA
moparjo68
OP
mopar
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OP
mopar
Joined: Jan 2008
Posts: 486
Sonoran desert, Arizona, USA
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They can weep oil down the pinion gear splines and past the nut and washer. Most of the time it is the seal, but that is another potential leak source that gets overlooked. When the whole area is full of lube mess it can be hard to tell sometimes. Exactly , so where is it actually leaking from, behind the yoke shield or at the u joint ? Behind the yoke shield.
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Re: Differential pinion seal leaking after replacing pinion seal
[Re: 1969ronnie]
#3040493
05/07/22 02:15 AM
05/07/22 02:15 AM
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Joined: Jan 2008
Posts: 486 Sonoran desert, Arizona, USA
moparjo68
OP
mopar
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OP
mopar
Joined: Jan 2008
Posts: 486
Sonoran desert, Arizona, USA
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Hi Mopar , Did Shop use a Original style 742 MOPAR # 1828719 leather seal , or the rubber Mopar # 2404135 same as SKF or CR #18912 ? Need to know to answer . Ronnie I looked on the receipt. It just says pinion seal replacement.. Probably the cheapest pinion oil seal was installed.
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Re: Differential pinion seal leaking after replacing pinion seal
[Re: 6PAX]
#3040570
05/07/22 01:40 PM
05/07/22 01:40 PM
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Joined: Jan 2003
Posts: 15,355 Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 15,355
Omaha Ne
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I have a similar situation. I took a Dana to the local ring & pinion shop back in 2015 to have new gears installed as well as axles and seals. Put the rear end in my car (which was in the process of being restored so it wasn't being driven yet) and in a very short time I noticed drips on the garage floor. Checked and found fluid leaking out of the pinion seal. I didn't have the spring perches welded on yet so I just tipped the rear end up so no more fluid would leak out. I still don't have the car back together yet but once I get it on the road I guess I'll have to take it to the pinion shop and get another seal installed. Do be aware that welding the perches without a jig in place can tweak the tubes. On the pinion seal, Just do it yourself. Pretty easy except for torquing the pinion nut. And make sure to use red loctite on the threads and stake them when done
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