I have a kia rio 2001 the car shakes when i drive it. seems that it does not go into gears, it has no power.

75w 90 gear oil. There is a drain plug and a fill plug.

https://www.google.com/search?q=2005+kia+rio+manual+transmission+fill+plug

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check for a problem shifter cable. broken frayed or dry.

Front end elignment, or un balanced tires ?
hope this helps?

If it doesnt shift at proper speeds when its driving, then yes, the transmission. Make sure the fluid is full when engine at operating temp., idle. in park. If it's full, and no obvious shifter linkage problems, then you need to have it looked at by a transmission shop.

did you replace the cable or did it come loose? are you sure your talking about the clutch cable for shifting the gears or the rod for the clutch master cylinder under the dash?

just under your gear stick is the gear box inside the bos are the gears flooded in lubrication ( vulvalien) oil and to reach it get under car or prt it over lift and open the small level check / refill hole thumb up

First of all I pity you Kia just a moving time bomb of trouble You have a short and it will not be easy to fine. happy tracing.

replace motor mounts , if needed transmission mount too.

your clutch wheel is completely burnt out do not try to drive your car anymore if you do you will damage the fly wheel. if you have the experience you can order a clutch kit that comes with clutch wheel pressure plate and throwout bearing and install it yourself. if not then it is a very difficult job and you will need to have it worked on in an auto shop. for info and repairs for your car go to autozone.com sign up its free then click on repair manuals you will find all of your info there....good luck

That was exactly what the the problem used to be...THANX...Guru INDEED...