I have a Modle 37 that I'm trying to replace with sythetic furniture.  I have everything apart, but I can't figure out what part is suposed to unscrew from the forearm.   I have this tool that suposed to "easily unscrew the ebdcap," but of course it doesn't budge.  The front endcap, with the 2 notches that the tool looks like it fits into, looks like it isn't suposed to turn.  The rear endcap looks like there are threads there, but I can't get it to budge.  Any help would be appriciated.

That slotted cap will come off ,but it's
a PITA. ( Been there )

Squirt some gun oil in there , and attach
a pair of vise grips to the tool for leverage.

Here is a link to the disassembly manual
( its a PDF file )

www.ithacagun.com/downloads/model_37_field_maintenance_manual_090402.pdf

First off thank you for the link.  I have that PDF file and have printed/gone over it.  It doesn't show the actualy forearm disassembly.  It shows how to take off the whole thing from the mag tube, but I'm still unsure which end is suposed to actually unscrew.  could you be more specific?  Is it the front with the two notches or the rear part with the slide that actually unscrews?  Thanks again.