i have 2000 accent all the gears work test it.but when change it to reverse
it feel ilke it's in neutral.and some time it moves to very slow when it in
reverse while the engine shakes. anybody know why this is happening? thanks

 

You'll need to check your fluid level and range switch and shifter cable
for proper operation. If all that is working properly, you probably need
a transmission overhaul or replacement.