My "2000" Hyundai tiburon wont shift when up to temp

Hyundai Coupe Tiburon Service Repair Manual 1999 2000 2001 2002 2003

for the easy solution download the pdf file

HMA/HAC shows a span of 1996-2001 Transmissions, there are a few different options to choose from, Depending on motor size, and year, The picture enclosed shows all manual transmissions. Hopefully this helps you.

change the auto transmission fluid and filter and check the linkages
perhaps one it loose and not engaging

clutch

it sounds like transmission trouble take it to a shop cause i dont think you wil have the tools to fix the trans at home

clutch is out or slave cylinder

Go to www.hmaservice.com and register( Vehicle by VIN). Afterward, you have access to shop manuals, service bulletins, wiring diagrams, etc. about your vehicle.

why 2000 hyundai tiburon
overdrive sometimes not working

Okay, I baught an 01' tiburon last march. When I first had trouble with the tranny it wouldnt shift into fourth and no it wasnt the overdrive button. Then it started downshiftling like what your experiencing then I lost reverse. Ammco rebuilt the tranny. I would take it to them, they will inspect it for free. You may just need a tran fluid flush. You should know that in the automatics the tranny is the weakest part of the car. The engines are great, just everything around them seems to fall apart after 120,000 miles.
Ammco offers a free inspection service. However Just from experience - if you need a new auto tranny it is cheaper to buy one already rebuilt (with warrantee) and pay to have it installed than to rebuild the one you have.
Cheers to hyundai challenge : )

Faulty shift selonoid in the transmission most likely.