I've got a 97' EX civic sedan with an automatic. If I step on the throttle hard from a full stop there is an ugly clunk, but then it shifts fine through the rest of the gears. If I go easy on the throttle from a full stop, no clunk. Any ideas?

 

Have you checked your engine and transmission mounts? If one is broken, that sound could be the engine itself moving around and hitting stuff...

 

actually I haven't, I'll check them out. thanks