1964 Valiant "Get Runnin & Drivin"

So, what's up with the new rear end? Different gears or Sure Grip maybe? Or maybe the old one was singing the death knell...lol :eek:. I'm sure it's hotter there than it is here, and it's been hotter'n the hinges of hell here the last few days! I have started keeping a gallon milk jug full of water in my little garage fridge just to stay hydrated with.