seafoam will break up the sludge. youre going to have to fill with fresh gear oil anyway and flush the crap out a couple times. seafoam wont hurt it. infact if you ever get water in there seafoam is your best friend...Thanks for all the advice guys. It’s supposed to be 103 this weekend so I think I am just gonna rinse and repeat a few times with gear oil over the next couple hundred miles. I have had no problems with the diff or birfs I just knew the seals were bad as there was tons of grease leaking from the wipers. I was thinking of putting in a can of sea foam with some oil and doing an initial fill and rinse with just like 5 or 10 miles of driving to warm it up but I didn’t know if it was safe to put the sea foam in there as I doubt I would be able to get ALL of it out after draining. Going to finish the job this weekend as long as the heat doesn’t take me first.
Thanks again