i would make sure that the engine is idling at the right rpm cause to fast of rpm can cause that for sure
If the automatic transmission on a 2002 Kia Rio won't go into park and there is no reverse, there is a problem inside the transmission with the gear bands. Each gear has a separate band and sometimes they wear out. New bands need to be put in or a new transmission needs to be installed.
Depends on the transmission. Many transmission bands are not adjustable.
Check your Automatic Transmission fluid level
ignition will be turned off and keys left in ignition, transmission placed in park (automatic) or reverse (manual), parking brake set, parking lights/emergency flashers on
Put it into reverse when moving rapidly forward.
Check Your Tranny Fluid.
could be either transmission shift linkage not engaging reverse ( stops at neutral ) worn joint connectors sometimes cause this. or reverse clutches or gears bad inside transmission.
Have you ever changed the fluid and filter in the transmission? If not, that's the first thing you should try.
Sounds like you need it reworked.
bad transmission
until you face a wall.
My 2001 hyundai accent has no reverse