Hi everyone. I just purchased a 1990 240 DL wagon and the the blower motor seems to need replacement. It only runs on the two high speeds and makes some serious noise for a few minutes when given the opportunity to run at those speeds. Is this something that is reasonable to replace or am I "in for it". I have done a fair amount of heater core replacements in other cars, so I am pretty well aware of working under/behind/removing dashes.