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-   -   Fill differencial through vent port? (http://www.wranglerforum.com/f210/fill-differencial-through-vent-port-246284.html)

Bigman610 05-31-2013 04:14 PM

Fill differencial through vent port?
 
I have 2004 Rubicon with Dana 44's in which I'm changing the fluid. I had no problems with the front however I can only get about 1 1/2 quarts in the rear. I was wondering if it would be possible to put the remaining 16oz in via the vent port? I'm open to any suggestions. I tried putting the rear tires on ramps in an effort to change the angle of the fill hole but this didn't work.

callbob 05-31-2013 04:29 PM

could be wrong here, but I've never filled a rear end past the fill plug. Did you give it time to disperse and settle?

Bigman610 05-31-2013 04:36 PM

She's still sitting on the ramps, I'll pull the fill plug and see if letting it sit for about 30 minutes makes a difference.

Rolf 05-31-2013 04:58 PM

If you overfill it the extra fluid will just push out the breather pipe and make a mess of things.

jeepers29 05-31-2013 05:02 PM

Quote:

Originally Posted by Rolf (Post 3812204)
If you overfill it the extra fluid will just push out the breather pipe and make a mess of things.

This, I learned by filling to fill plug on a riddler diff cover. The plug is higher and I have got a mess. :whistling:

Bigman610 05-31-2013 05:12 PM

I'm certainly not trying to overfill fill it, I've read several responses of guys dealing with that mess, just trying to get the recommended 2 quarts in.

My driveway sits at a pretty good slope to the street, so I pointed the front end downhill and pulled the rears up onto ramps. This set up allowed me to get an additional 8oz in, leaving me about 8oz shy of the full 2 quarts. Is this something I should leave well enough alone or be concerned that its not full to the recommended specs?

Jerry Bransford 05-31-2013 05:31 PM

It is filled adequately if it is filled to the bottom of the fill hole if you are running OE driveshafts.

Bigman610 05-31-2013 05:38 PM

That's my concern Jerry, I'm running a 3" long arm with a 1" body. I have a Tom Woods driveshaft but concerned that the angle of the pumpkin is different then stock not allowing to be filled properly.

freeskier 05-31-2013 07:51 PM

10 Attachment(s)
Quote:

Originally Posted by Bigman610 (Post 3812300)
That's my concern Jerry, I'm running a 3" long arm with a 1" body. I have a Tom Woods driveshaft but concerned that the angle of the pumpkin is different then stock not allowing to be filled properly.

I would add the rest through the breather plus some. The bigger issue is the pinion bearings, this is why aftermarket covers come with higher fill holes. With a higher pinion angle you want to have at a minimum the factory recommended amount plus some so that inner pinion bearing is still sitting in oil.

Bigman610 06-01-2013 07:20 AM

Thank you for he advice freeskier, I'll do that then look into an aftermarket cover.

All Terrain JK 06-01-2013 08:39 AM

1 Attachment(s)
My pinion angle is about 22 so I fill to the plug then add another half quart though the vent.


Attachment 256258

This was recommended by the driveline shop that rebuilt the axle. I haven't had any pinion bearing problems or burping lube from the vent

Bigman610 06-02-2013 09:42 AM

All Terrain TJ, do you simply remove the hose then pump it in? That's what it looks like in your photo, just wanted to be sure. Thanks for the help.


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