[Gupz]

If you're on carpet, you'll want a gear diff. A ball diff may be a little easier to drive, but you will end up needing to do a lot of maintenance and probably end up replacing balls or drive plates fairly quickly.

I strip my gear diff every 3 club meets and before any 'big' meetings, Regionals, oOple, Carpet Kings.....etc

A lot of people leave their diff's until they leak or start to feel different. I just change mine so that I know it's going to be the same as the last time I used it.

If you weigh your diff when you fill it with oil, you will always be able to put the same amount of oil in. If you go up or down an oil weight, always fill the diff to the same physical weight.

I guess it depends how anal you want to be about it. I know guys that don't touch a gear diff throughout the year and it's still been working for them.

Just do what works for you

If it's a ball diff......I can't really help lol I think they are more trouble than they are worth, but that's just my opinion