37 hours sounds like a pretty full academic load, and that fact will help you in addition to your having done well in the classes.
Case in point: I'm a non-trad applicant with a spotty undergrad GPA, and I took a couple of solid science courses (two semesters of biochemistry, one of human physiology) at a reputable school before applying, and I did so to (a) bump up my science GPA, (b) get back into studying mode, (c) prep for the MCAT, and (d) show schools I could handle the science courseload.
As far as (d) went, I got to talk to a couple of admissions officers after my first application cycle, and I got both unfriendly and friendly variants of the same response. The unfriendly response: "It's nice that you took the science classes and that you did well in them, but what we really want to see is that you can handle a full load of science coursework and do well in all of your classes. If you have to quit your job to do a full-time postbac program, well, that's what it's going to take." The friendly response: "We really want to see that you can handle a full load of science coursework and do well in all of it, but we realize that not everyone can drop everything and become a full-time student in order to get into med school."
So, yes, it's true that your old academic record doesn't vanish, but academically and MCAT-wise, you've greatly improved your chances of acceptance over last time.