transmition basic question?

Question

hi all,

My friend thought the transmition on her 04 kia rio might be slipping..her definition of " slipping" was the car seemed to take an extra second to accelerate( it didn't like jerk ..basically the car revved a lil..perhaps she had to put a bit more foot into it
the car is only 3-4 years old..but has like 100,000miles on it.
I check the tranny fluid. was low..filled it to the proper level..road tested it..seemed to take hills fine.

if her tranny is slipping..what would the car be doing?
the car wasn't bad on power..it is a kia after all..just seemed like perhaps her fluel injecters might be clogged up..

would this account for a lil less power/ than usual..eat up more gas? she just drove the car on a trip down to dallas..said it seemed like the car used more gas coming home than on the way down..
oil changed like 2 months ago/new oil filter/airfilter

Answer 1

if the transmission was slipping in it it would rev the engine up higher without really moving the vehicle that much,it would also hesitate when going in to gear,and the fluid in it will be a brownish looking color and have a burnt smell to it,if its good and red and doesn't seem to have any hesitation in it,there's a good chance it may just have been a little low,i would have her drive it for a few days and see if it cleared up,and its possible what she may may be experiencing with it is it needs a good tune up,any engine running bad will make a car not feel right,the tune up would probably help it on gas mileage also,I'm sure it wont hurt it none,good luck on it.

Answer 2

Here's the operative question:
if her tranny is slipping..what would the car be doing?

There's only one answer. If the transmission is slipping the relationship between engine speed and car speed will be incorrect. It will probably also vary. Once the transmission starts to slip, it will be possible to increase engine speed without increasing car speed.

Does that make sense? All this "I had to push the gas more" crap doesn't mean a thing.

You may be wondering, how do I know what the engine speed is supposed to be at each ground speed? You better be figuring that out. You can possibly figure that out going downhill if you have to on her car. On your own car, it should be obvious if you pay attention.

Answer 3

If it is an automatic then I would drive the car for a few days then check the fluid level again this time put some on your fingers and rug them together to fill if it is gritty. Now you gotta do the sniff test. If it smells like burnt oil then she needs to take it to a shop.

Answer 4

the color and condition of the transmission fluid is your best indicator of what is going on, if it is black and smells burnt, you may have a problem, some people mistake engine bad engine performance for transmission problems, its hard to tell without driving it, but if the engine is revving and the car doesn't seem to move as fast as it should the trans could be slipping

Answer 5

At 100k she should have had her tranny fluid replaced , the trans filter replaced and the belts tighten by now on a KIA. Check the book on maintains schedule for the trans.

Answer 6

Time for a trade in. It is a KIA after all. It has had its life expectancy. But it sounds like a transmission rebuild.

Answer 7

Big Rick says it well.
Check the color and smell of the transmission oil first.
Could be the car is just downshifting when you ask for more power.

Answer 8

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