What's overdrive do? I don't drive yet..so thats why I don't know. Also..do all dodges have that crazy axle cover...mine has some huge metal tubing covering the whole length of it.

 

http://auto.howstuffworks.com/automa...nsmission8.htm

In simple terms, it allows you to get more revolutions out of the transmission than what you put in.

I don't really understand your axle question. Dodges don't have axle covers. In fact, I've never even heard of such a thing as an axle cover. What you see there is the axle housing....that's what pretty much all DANA/Chrysler Corporate axles look like. Except Dodge has the "wonderful" CAD housing cast into the front axle. Are you maybe looking at the driveshaft? [&:]

 

o wow..that was stupid...lol..not a lot of sleep...I meant driveshaft.