okkkie dokie here
ive got a '55 20ga model 37 featherweight, any one have a break down/ disassembly guide?

Here you go
http://pdf.textfiles.com/manuals/FIREARMS/ithaca_3787.pdf

The link still works. Thank you.

That PDF Redrum linked to above is great; it's one of the most thorough I've seen.

Here's a YouTube video that shows most of the process, especially some of the typically tricky parts. It's a pretty good video despite the music:

https://www.youtube.com/watch?v=w63R-lGEegg

Once you've done it a few times, you'll come to appreciate how simple and reliable the Model 37 mechanism is. There's very little to wear out, and a scrubbing and perhaps fresh springs will solve 99% of any problems you're likely to encounter.

Good luck.