How bad did i mess up?

[06aeriodriver]

Ok first i will apologize for posting so many threads in one day lol. I just now realized that i had to change my rear differential fluid at 5,000 miles. Well now at 50,000 i just realized this. I will be getting it changed saturday morning. How bad did i mess my car up by missing this step. I do every service needed coolant flushes etc. just totally forgot about this step. The mechanic i use seemed like it was no big deal, but its not his car either. God i hope i didnt really mess something up.

[06aeriodriver]

I checked my car log and actually I already changed the rear differential fluid. So if there is a moderater around this thread can be deleted. Good thing I kept a log and receipts from all repairs this saves me a heart attack.