Bronica ETR shutter speed selector not working

HI all

OK I have been problem solving a bronica issue now for a good while and maiinly th issues stem from the fact numerous things were wrong and when I say numerous I mean the orignal back and lens were not working at all, these issues are now fixed. My last iissue is the camera body itself and i was hoping to try and fix this DIY style as it will likely end up in the trash as it would be cheaper to buy a new one than fix it I bet.

The camera shutter works fine but the speed never changes regardless of the selection, I have used new batteries and different types to no avail, the indicator light shows its working but the shutter speed doesn't change. I compared this camera to another and the shutter selection ring is noticeably looser. I reckon the issue is the ring not triggering the selection in some way. Does anyone have any ideas on what might be going on and how to fix this at all, any info, sites or descriptions would be amazing.

Thanks all.