Hey fellas. New to family. The plate on my firewall says the following. Engine: 6G72 Trans Axle: V5MT1 4222

Can someone give me some info on what these numbers mean? I know it’s a 94 MM 3.0L V6 and 5speed manual. But what does the 4222 mean and what’s the difference between other 5 speed transmissions that are in the MM. thanks guys. Have a great day.