What you are looking at is the "differential". The bit that allows the outside wheel to turn faster than the inside wheel when you are in a turn. The power is transferred through all 4 "spider" gears. With the center block in place and the "C" clips in place the axles are secure and connected to the big ring gear. Just only one axle at a time. Always the axle with the least resistance to turning. So when you are in a turn the power is sent to the outside wheel. Or if you are on ice it will go to the wheel that is not helping. If you hold one wheel and turn the drive shaft you should see the other wheel turn. That is normal.If you can get some help to do that while you look at those gears you will see how it works. I hope this is helpful.
