Question about 2004 Kia Rio

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Transmission problems overdrive button wont disengage or engage overdrive, car starts out in 2nd gear unless manually put down in first,then only shifts to second.Also the mph dial on dash wont regester speed.

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  • Anonymous Dec 30, 2008

    Same problem!! What do I do?

  • Anonymous Feb 06, 2009

    same problem but rpm works still.

  • Anonymous Mar 26, 2014

    car jars when shifting from first to second gear

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This is what my 04 Kia Rio is doing exactly. I was told that the TCM and Shift Solenoid "C" is faulty. Am trying to figure out how to go about fixing that without paying more than the car is worth. My tech checked with the local Kia dealership and the TCM new is I think around $700. You also have to buy the program to tell this high dollar part what to do and that is right at $100. I have found that sometimes if I let the car warm up and then keep hitting the overdrive button, eventually it starts shifting correctly.

Posted on Jul 26, 2009

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1 Answer

Manual transmission


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Is it ok to start off in 2nd gear and manually shift up to 3rd and then overdrive?


You can put the shifter in 2, 3, or overdrive. It will still start in first and shift up to whatever gear you have selected. Try it, you wont damage anythingl

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Heres the symptoms : engages but slips in reverse and drive, sometimes feels like partial brake applied. I have manual 1st and 2nd. When engaged in drive, you turn off overdrive and you can spin the...


it may be a bad transmission modulator valve located on the side of your transmission,vacum operated. a sudden downshift or forward shift when unexpected is sign of a bad modulator valve or a vacum leak to the transmission.best to shop around for a garage w/references when it comes to transmission work though. check all the vacum lines to your transmision,you need to look on the underneath side of your truck on the side of transmission for a loose or disconnected vacum line on the side of the transmission. when you feel the vacum line,follow it to the top of engine,the vacum line is about 3/8th line,and may be disconnected or losing air. to make this short,when you drive the car,start out in low gear and shift the transmission,manually from 1st to 2nd to 3rd does it do right with no slipping? if it does this right and shifts great manually,the modulator valve on the side of the transmissions bad,or a bad vacum leak in-between.thank you for choosing fixya.com

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2000 volkswagen beetle will not shift into overdrive but runs good in all other gears. It shifts smoothly but overdrive never engages


sounds like an electrical problem with the transmission ...these transmissions are fully electronic and the gears are engaged by servo valves these are controlled by the computer.... if there is any problem with the engine or a few other things it will be put into safe mode and it wont engage overdrive ..it may need to be scanned to see if any codes exist in the auto trans ecm..

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Should I keep overdrive on or off? also should keep ECT on or off?


Hello. Welcome to FixYa. I am Toyota Ed, and I will be assisting you today.

The Overdrive function allows the transmission to shift an extra time, sort of like selecting 5th gear in a 5 speed manual transmission. The Overdrive, when used, will save you gas, as the engine is no longer maintaining a high RPM at normal driving speed. Look at the tach whilst driving about 45 mph, and engage/disengage the OD. You will see the tach RPM raise when the OD is off.
More RPM = lower fuel mileage,

The ECT is a different circumstance. The ECT button is used primarily when you have a heavy load in the car, or are towing something. All the ECT button does, when it is engaged, is lengthen the shift points as the transmission upshifts. Normally, the transaxle will shift into 2nd gear at 18-21 mph. When the ECT is engaged, the transaxle will shift in the area of 22 -24 mph. In short, the ECT just makes the time to the 1-2 and the 2-3 upshift longer, to compensate for the additional load being carried/towed.

I hope my assistance answers your question.

Thanks for choosing FixYa today!

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I have an 80 series landcruiser with A442F transmission, built 1993. It will not select 1st gear or overdrive. It takes off in 2nd and shifts to 3rd normally, 1st gear can be selected manually and changes...


It seems like your "2nd start" button is turned on. The 80 series LC has a button next to the shifter which allows it to start in 2nd gear. If the button is not engaged then there could be a problem with the circuit, but that is not common

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When we got the transmission out and opened up we found that the "fork" which moved the 2nd gear assembly into and out of engagement had BENT, and become disengaged from the 2nd gear assembly.

Obviously, though he wouldn't admit it he, or someone, had put too much "muscle" into making the shift into 2nd gear, had bent the fork so badly that it became disengaged from the gear.

Rather than try restraighten it we bought and installed a new replacement fork.

I hope the problem and solution is simpler than this, but it's a possibility.

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Jun 29, 2008 | 1998 Jeep Grand Cherokee

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