I actually just installed these on both the front and rear differentials today. However, I missed the part in the writeup about adding more than 2 quarts to the rear....i did the ol' fill'er up to the fill hole....5 quarts worth so after that I went to project-jk and double checked it and saw how much I really needed. Drained 2 and a half quarts out and used it for the front....big money that royal purple is. I checked it as I poured it back in the bottles and it still looked really clean...

Now for my question....How can you tell whether you are low on diff oil or not? anyone know of a measurement below the fill hole if I used a zip tie as a dip stick?

Thanks for the feedback as usual

 

that sucks. yeah, you don't fill up to the drain hole on them. i don't know how one checks the level on them though, that'd be good to know.