Originally Posted by patiofurniture

The B44.3 is backwards compatible!

That does not necessarily mean that the B44.2 is forwards compatible.

The center gear diff has larger bearings than the slipper setup, so new larger bearing inserts had to be made and as a result the motor mount slot had to be made bigger. So now there are two new bearing inserts one thats for the gear diff and one that is for the slipper.

The kit comes with both sets of bearing inserts although it does not come with the slipper.

If you wanted to upgrade your B44.2 to accept a center diff, be prepared to get a chassis, motor mount, center bulkhead and center CVA's, top decks, along with the Center gear diff. It is probably cheaper to just buy the whole enchilada with all the new parts.