RE: Inner and Outer Seal failure- Rear end- 64 Plymouth

["Dennis C." <dennis.2914@xxxxxxxxx>]

Hello,
The inner seals are installed with the spring lip IN to keep the 
differential lube out of the axle bearing.  

The axle bearings are grease packed tapered roller bearings similar to 
your front wheel bearings except much larger and pressed onto the axle.

The end seal also is installed with the spring lip in to keep the grease 
from the axle bearings away from the backing plate and brakes.

Normal fill on the differential as I know it is the way you filled it.

I would suspect that the seals were installed backwards or the lips were 
damaged when installing the axles.  Very easy to damage the seals 
installing axles.

My brother has a good story about the fist one he worked on, he was 
careful to clean all of the old grease out of the wheel bearings and put 
them in dry thinking they got lube from the differential - cost him a 
set of wheel bearings.

Take Care
Dennis C.


waedison@xxxxxxxxxxx wrote:
> 
> 
> Okay, so when I went through my 64 Sport Fury I got a couple of years 
> ago, I rebuilt the rear brakes, put in new rear axle bearings as well as 
> the inner and outer seals. The seals I put in leaked, on both sides, 
> ruining the brake shoes. I had a difficult time installing the inner 
> seals even though I have what I think is the correct Miller driver # 
> ?-839. After ruining a few inner seals, I thought I got it right. While 
> taking it all apart today, I don't see any apparent problems with the 
> seal faces. 
> 
> So, I've taken the rear axles out to take a look. when I pulled the 
> first axle, I got about 2 cups of rear end oil on the ground. I see that 
> the oil is sitting level with the bottom of the seal as it sits in the 
> axle. In other words, the axle tube is full of oil up to the bottom edge 
> of the seal. Did I simply overfill the rear end when I refilled it? The 
> SM says the rear end takes 4 pints, but what does that look like from 
> the end of the axle tube ? I used what I thought was the correct rule of 
> thumb when filling it, filled it till it touched the tip of my finger 
> with my finger in the fill hole, bent at the first joint. 
> 
> Second, how does the large bearing at the end of the axle get it's 
> lubrication? Is it supposed to be bathed in rear end oil, which doesn't 
> sound right, as it's sandwiched between the inner and outer seal. Am I 
> supposed to pre-grease it and it stays lubed with that, or is some oil 
> supposed to get past the inner seal and lube it. 
> 
> Hope these questions are clear. Thanks/Butch 
> 
> [Non-text portions of this message have been removed]
> 



1996 Dodge Ram 3500 Van Conversion
1964 Plymouth Belvedere 318 Auto
1963 Plymouth Sport Fury 383 4-speed
1949 Dodge Pickup 289/C4 soon to be changed
1998 Honda Valkyrie Standard


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