I have a 1990 lwb montero I just bought. there was no brake fluid in master cylinder when i bought it. I filled it up and pumped the brakes so i could try to find where the problem/leak was. It seems to be leaking from where the master cylinder meets the brake booster. I've never dealt with master cylinder or booster before, is there just a gasket between the two that could be bad, or is it one or both parts that are bad. Thanks.