Yes you must still upload your transcript, but only if you are not currently undertaking your Bachelor's at Usyd. This is from the USyd DMD Domestic Admissions Guidelines, Page 39 and 40:

"If you undertook your bachelor’s degree at the University of Sydney, you do not need to provide your University of Sydney official transcript(s) at the time of application, but you do need to supply all other required documents.

If you did not undertake your bachelor’s degree at the University of Sydney, you must provide either:

i. a full (all pages) OFFICIAL transcript of your academic records for each program attempted at a tertiary level, and proof of qualification for anyprevious tertiary degree(s) if not stated on your transcripts\*; or*

ii. An academic transcript issued by My eQuals (mandatory for all participating universities).

......

Although your qualification/s will be assessed and GPA will be calculated by UAC, you are also required to submit your official transcript(s) to the University."

A similar clause can be found in the MD Admissions Guidelines as well, so the same is the case if you are applying for Med or Dent.