NELSON_123

Hi there, am knew to the forums but need some advice on my Suby. It’s an Impreza 1996 AWD, I was getting a rattling noise from the gearbox when revs were about 3k+, thought I might have dropped a screw in there. I looked just now and there’s a bunch of Blue plastic looking stuff with grease on it around the entrance to the gearbox. I tried to add a photo but it says it’s too large. Can anyone help please? Should I be worried about the gearbox blowing soon??