Over filled rear diff?

im out here changing oil in my front and rear diffs.

Upon draining my rear diff I noticed about 4 quarts or fluid come out, maybe more. I was under the impression it should have been about 3 quarts from the factory.

Upon filling the rear diff, it took about 4.5 quarts before it started to trickle out of the fill hole. Am I over filling? Or is the captivity somehow over 3 quarts?



It's a 2016 TRDOR 4X4 Auto transmission.

 

Jk manual says 4.2 quarts. All is well.

Should have checked first

 

Why?

 

Why changing diff oil?

I'm almost at 20,000 miles and wanted replace the factory oil with a synthetic oil. I also just installed the ECGS Clamshell bushing in my front diff and needed to add oil anyways after the install of the bushing. I fuguered id change it too while I was there.

 

My Haynes manual calls for the differential oil to be changed at 30,000 miles or 24 months. Wouldn't this be early to change it or is this correct?

 

You can't really over fill it. It'll pour out the fill hole as fast as you put it in once you get to that point. There are also going to be bubbles and air pockets that take up space which is why many people top it off the following day after driving it.

 

Sweet. Thanks man. Never done it before, and I worry about everything lol

 

How was the install on the bushing?

 

Pretty easy. Took about an hour total. Didn't have to remove too much shit to pop the CV outta the way enough to get the the old needle bearing

 

That's correct. I'm just a sucker to show love for my baby. Figured I'd do 30,000 mile intervals from now on. The original oil was pretty dirty and had a good amount of debris from break in

 

We've all been there. Congratulations on jumping in.