Obviously whoever did the rebuild screwed it up dear. I hope it came with a guarantee...as for the speedo not working, the doofus either didn't reconnect the speedo cable to the tranny (that's where the speedo comes from in older (not digital) cars...if you did the rebuild yourself I don't know what to say, lots of possibilities for why it's not shifting...missing gasket will do it among a myriad of other things...bands not adjusted correctly, etc, etc...like I said hope you have a guarantee