Ok...I'm pretty sure the overdrive took a dump on my g/fs AOD, I didn't get a bunch of time to drive it, but it was doing the high revving instead of shifting into overdrive. Are they hard to rebuild by yourself? And should I just have all new clutches and everything put in instead of just having an overdrive band put in? Also, how do I know if I have a steel or iron drum??? I need to do this for a cheap as possible cause we're pretty broke right now, any help appreciated