means its time to change your auto gbox...u have a few choices.
1. change to another recond auto gbox rm1.8k including workmanship- normally 1 mth warranty
2. change the internals, from spare part shop, but no warranty
3. change to manual tranny, bout rm2.5k - 3.5k, depending on the gbox codes.
4. get a halfcut, RVR manual rm4k, 6a12tt rm6-7.5k, evo1-3 rm7-9k. add another extra rm2.5k for wear & tear parts + workmanship.
if u plan to rebuild your auto tranny, get an ATF cooler & add a fan infront of it & use toyota type 4 ATF.
1 more thing, means your gbox jam already.....but dont press the accelerator, your car might shoot forward.