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new guy on the block
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'55 Savoy
Posted 2020-02-24 12:03 PM (#594755)
Subject: new guy on the block



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Posts: 14

Hello all I'm new here ,and am new to the site/hobby. I own a '72 Challenger and enjoy cruising and racing it occasionally. I recently picked up this '55 Savoy 2 door, all stock, with 66,000 miles on it. I will have questions galore in trying to get it road ready. I have rebuilt all the brakes, replaced the fuel tank, pump, carb., found an air cleaner assembly etc. I have drained the powerflite of old fluid, which looked to be in good shape, the rear end leaked oil, so I tore it down and put a new gasket and front seal, and lube back in, later to find a big puddle under it on the floor! front seal seems to be the culprit, are there any tricks to fixing the leak?? it doesn't have a modern seal, looks like a fiber type? The trans pan leaks too after a new gasket install ( only put 3 qts.of oil in). Any input would be a great help, thanks in advance.
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Old Ray
Posted 2020-02-24 1:44 PM (#594761 - in reply to #594755)
Subject: RE: new guy on the block



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Location: Invermere B.C. Canada - Rocky Mountains
Welcome. I am not sure what the fix is to the pinion oil seal leak, but every picture or car including my '56 that I have seen, has this big ugly gear oil splat on the underbody. Maybe the ball and trunnion front u joint has some weird harmonics. Did you look at the pinion yoke seal wear surface for grooves or pits? I would possibly resurface the yoke and also try to find a new type of oil seal, or as some have done, change the differential to a newer type.
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60 dart
Posted 2020-02-24 5:39 PM (#594770 - in reply to #594755)
Subject: Re: new guy on the block



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sounds like the only thing it can be is the pinion seal . should be able to find em on epay -----------------------------------------------------later
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'55 Savoy
Posted 2020-02-24 6:30 PM (#594772 - in reply to #594761)
Subject: RE: new guy on the block



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Posts: 14

The pinion looked smooth, and had the witness mark where the seal sat, I didn't use any silicone tho, maybe I should have?? I will probably pull it apart again , and measure the O.D. of the yoke, and I.D. of the seal portion of the diff to see if there is a modern rubber seal out there to replace the fabric type one. Any suggestions as to where to start looking?? Thanks for the responses!
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Old Ray
Posted 2020-02-24 7:04 PM (#594774 - in reply to #594755)
Subject: RE: new guy on the block



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Location: Invermere B.C. Canada - Rocky Mountains

https://www.rockauto.com/en/catalog/plymouth,1955,savoy,4.3l+260cid+v8,1349669,drivetrain,differential+pinion+seal,2380

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57burb
Posted 2020-02-26 3:33 PM (#594867 - in reply to #594761)
Subject: RE: new guy on the block



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Welcome to the site!

It's hard to diagnose an issue without being able to see it. But since you already replaced the pinion seal and it still leaks, I suspect there is another issue that won't be improved with gasket sealer.

If the bearings that support the pinion are out of spec, that condition can allow the pinion to be off-center a small amount, but enough to keep the seal from sealing. I hope that makes sense.

Edited by 57burb 2020-02-26 3:35 PM




(pinion.JPG)



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Attachments pinion.JPG (82KB - 11 downloads)
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Powerflite
Posted 2020-02-27 1:38 AM (#594887 - in reply to #594755)
Subject: RE: new guy on the block



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I had the same problem in my '58 Coronet. The original leather pinion seal was leaking on my gear set so I replaced it with a new rubber seal. Thought that would fix it, but now it leaks worse than before. I checked it out and noticed some play in the pinion as it can move up and down by at least .005" or more. Most likely, that's why I am having the issue, but I'm surprised that the gear doesn't make any excess noise. So for the time being, I just live with it as you can see from the oil on the bottom of my axle. Maybe the new rubber seal isn't made quite tight enough? I may try a replacement leather seal to compare it.

Edited by Powerflite 2020-02-27 1:41 AM




(58Coronet Rear Exhaust.jpg)



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Attachments 58Coronet Rear Exhaust.jpg (169KB - 12 downloads)
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58coupe
Posted 2020-02-27 1:17 PM (#594911 - in reply to #594755)
Subject: Re: new guy on the block



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You need to first determine where the leak is, from the pinion seal or from the gasket. If it is from the pinion seal, make sure you were sold the right seal. Next, does the yoke have a groove worn in it where the seal rides on it? If so, you can buy what is called a "speedy sleeve" which installs on the old yoke as a repair. Last, the oil can leak past the splines in the yoke so you should put some silicone on the splines after the yoke is installed under the nut to stop this. Don't get any silicone on the seal area. Of course as already mentioned, if the pinion bearings are worn out none of this will work until the bearings are replaced.
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