Disclamer:
I'm not a certyfied mechanic, i'm not assosiated with 4wheellparts, i'm not against anyone who posted above.

We don't know if the shop filled the diff, but we also can not be sure if they didn't (too much time had passed, i mean 6 months without checking the oil level?).

All i know is what i have experienced first hand, with my truck.

I have a friend in NY who owns a shop. I know everytime i go there to do something that i either have no tools for or the time to do it myself, the job will be done as good as if i was the one doing it (he is a good friend & i always tip the guys working there, a lot). But no matter how much i trust the guys, i always check whatever they worked on couple of days later, because a bolt might need to be retightened or the oil level checked, stuff like that (i know you can't check they work in this case, but simply checking the oil level is easy enought).

IIRC any gear install requires change of oil in between 500 & 1k miles anyway & if you didn't bother to even check the level on that thing within 6 MONTHS (and i'm sure you tup more than 1k miles on it) than it's your fault & not he shops.

Maybe they forgot to tell you the need to replace the oil afer certine timeframe, but you could never prove it.

Michael it was a little harsh the way you frased the post, but i would've frased it even wors (because of my lack of engilsh) & since we are unable to express exactly what we want most of the time (this is internet don't forget) it was taken the wrong way. I'm sure you didn't mean to sound the way others enterpreted (you've moderated me a fiew times before <img src="/forums/images/graemlins/shiner.gif" alt="" />).

But i'm not down with name calling either. If you had a problem with Michael you shold've PM'd him.

Just my $.02 on this

rubo