Front diff seeping/leaking at both seals

Rockwell Diffs

Ive been babysitting a seeping seal on my front diff. Now it’s time to get it done.

As I checked my fluid, the fluid was low enough - I realized the back seal of my front diff is seeping a bit too. When researching this topic before I’ve heard that a plugged vent tube could cause oil to push out the seal because of combustition and pressure.

Is it a coincidence? That both seals are seeping? I don’t want to pay to fix these seals without watching my guys free that vent tube. (I don’t work on the driveline myself, as of now) .,.

How does one clean/free that vent tube. I think on mine there’s just a plug with a cap towards the top , and I think that’s the vent area.

Any thoughts, or experience on this? Thanks in advance for your time

 

Thanks! I went back outside and moved the drive line up and down before the front diff, and SURE enough it was loose. I tried to draw a picture to show which way it was loose (Pictures are of the front diff in this post). This was tight not to long ago.

The drive line behind the front diff is tight.

What does this all mean? Especially with it seeping out both sides? Thanks for the tips

 

So I’m guessing 44 is the yoke nut? They call it the pinion nut in my book.

ten4. So replace the yoke, the seal, and the u joint on the front side? I wonder if it’s the same for the back side too?

 

What is that??

 

I know someone who replaced a u joint on his drive line, but didn’t replace the other u joint on the same section of the drive shaft; and in short order that truck bust the ujoint and ended with a wreck of wiring, abs wire harness and etc

So when I change the ujoint on the input side do I trace that part of the drive shaft up and replace the ujoint on the the other side too?