1985 f-150
 

So it looks like the back driveline is coming out of my differential case on my 1985 F-150 so I was wondering if it always looks like this or it’s not normal? Hers a pic
https://cimg5.ibsrv.net/gimg/www.for...c7432dd0e7.jpg

Are you talking about the U joint or the pinion seal?
Have you greased the U joint recently, of course thats only possible if you have a zerks nipple on it.
To replace the pinion seal you will need a 2 jaw puller.

1985 f-150
 

I think the pinion seal the white circular thing showing. I feel like it’s never been shown like that if that makes sense

I havent worked on one this old and the online workshop manual doesnt go back that old.
This is what Ford has been using for the last maybe 15-20 years but yours does look somewhat different.
Here is a parts diagram of the pinion seal for a more current F150 though.
The pinion seal is highlighted yellow, the pinion flange is circled in red.
https://cimg7.ibsrv.net/gimg/www.for...bf9901ce36.png

1985 f150
 

So does it look normal how that pinion frange is sticking out so far or is it coming apart and the whole driveline is going to fall?

Can you clean it up some better pictures with lighting so its easier to see.

The amount of gear oil seen is not anything to lose sleep over. A little amount of seepage which likely accumulated more dirt than oil. I would just make sure your gear oil is up to the bottom of the fill plug.To change that seal, you have to loosen remove the pinion nut which is very tight and is used to set the pinion bearing preload. It is very easy to mess up the adjustment when you go putting it back together again and end up with a noisy differential. So unless the oil from the seal is dripping all over your driveway, I would leave it alone and make sure you keep the gear oil level up.
U joints are ok as long as there is no powdered rust around the cups and no slop in them.

I believe that white part you are referring to is just a dust shield attached to the flange, to protect the seal behind it.

If you do decide to get involved with replacing the seal , mark the position of the large retaining nut that holds the flange on the pinion gear so that when you reassemble it you put it back EXACTLY where it was and hopefully you will have the same amount of preload. Good advice, if it is only slight seepage, keep an eye on the level, keeps it from rusting.

You might want to make sure the diff's vent is not plugged since that could allow some pressure to be built up inside.Other than the small weepage, I don't see any abnormalities.If you decide to change the seal anyway(which I wouldn't at this time), you will need to have a 1 1/16 inch socket, and a dial inch pound torque wrench to really do the job right as to verify/setting the preload as just putting the nut back in its original spot is not always a reliable way to maintain the proper preload.In reality, you would need to go very "slightly" beyond the nut's original spot.