99 sonata only engages park everything else feels like neutral

Hello, it sounds like there's some kind of concern with the automatic transmission - something that occurred in an instant and caused a mechanical failure. Check the fluid level first and see if it may be low -- in some cases, low fluid can cause a lack of engagement. Other than that, it will take some specialized testing to see what's going on. www.repairpal.com/repair-shops Check that link out to find some shops near you.