It is a safety issue. Unfortunately, some will argue this point. We had a thread late last year on this same issue.....and I was appalled at the amount of bad advice given (hopefully not taken).
Your vehicle's differential is strong enough to be used as a jacking point.....BUT DON'T....EVER !! Take the extra time to jack up each corner of your vehicle properly - from the corner. "Generally" this means near the shock mounts on the axle tube or front arms.
wyominghotwheel is correct. Instability is a literal killer when an auto is up on a jack. There is absolutely nothing you can do but watch when your car desides to fall. Failure to properly raise your car, or fail to properly support it while raised, is a mechanical suicide note. Also, improper location can cause mechanical damage.
Thanks, PAUL STEVENS for asking such an important question on your very first post. If you take the safe approach, you will be around this forum for years to keep us informed on all your mods and conquests with your GT.
__________________ daughter owns '00 GT, bone stock, black on black, rag top
dad services and maintains, and researches mods | 
