Originally Posted by derekshep
going from a dana 30 to 44 is a waste on money, if you want to up grade go to dana 60. the dana 44 is the same as a dana 30, other than the housing
I agree with most of this post.
A Rubi D44 shares everything with a D30 from the tubes out, but the R&P is stronger, and 30 spline inners vs 27 spline(D30). You can upgrade the D30 to 30 spline inners though, and you can upgrade both the D30 and Rubi D44 to 30 spline outers and unit bearings also. They both use the same joints, and can be upgraded to 300M joints.
The benefit of a D44 over a D30 is gearing choices too. You can only go to 4.88 with the D30, but all the way to 6.38 with the D44.
Personally, I went from a D30 to a Rubi D44 with a lot of upgrades and ran the crap out of it with 37" stickies for 4 years.
For tires up to 37s and up to 4.5+ trails, I think a D44 is a suitable fit for 99% of wheelers. For us other 1%, a D60 is a better choice.
Depending on how you wheel now, you might be better with a D60 now, but not many people actually get to the level of wheeling to NEED the D60 front. Also, with going to a D60 front, unless you get a custom one built, you will need to do a lot of other upgrades to make it work.