anyone ?

 

I have two LX's - now 13 months old.

Since new, the transmissions in both have exhibited a weird hesitation or hiccup or lurch at low speeds every few hundred miles.

The car takes off from stop - then at around 10-20 mph, it feels like the drivetrain simply drops out and then re-engages.

I have never gotten a satisfactory answer except the Sonatas have the so-called "drive by wire" electronic shiftable transmissions common to most new cars and they are prone to such glitches.

In my case, it is an unnerving thing but doesn't seem to get worse or cause any real problem.

Forget the "learning" attribute that some people ascribe to these transmissions - if they learn, then mine must have been at the end of the class.

 

No need to post to yourself there LebSonata. This happened to me with my 89 Excel within hours of buying that used POS. God I miss that little thing.

Had an 04 Turbo Subaru Forester, and it would miss catching a gear. Very dangerous at times. :trophy:

Great comments kn5owa. I would rather have a responsive 4 Speed A/T, than a quirky 5 Speed A/T.! :w00t:

 

what should i do ?

 

I too have a Subaru Forester and the Sonata. Both have electronically controlled transmissions. I have observed what I consider a dangerous situation with the Subaru. If I start slowly and then try to accelerate hard after I am in motion, it acts like it goes out of gear with the engine revving and no power until it then suddenly catches. I have felt a little of this with the Sonata, but not nearly to the extent it occurs in the Subaru. I know from the Forester forum that others have the problem with the Forester.

there was a recall to reprogram the transmissions of the early Sonatas. Is is possible yours needs to have this done?

I would suggest that you consider at least getting a record of the problem on file with the dealer and see what they can do. Keep us updated.

 

today at my uni , i was going to take the car to the company , so i turned it on , warmed it up a little , put it into D , and it took 4 seconds for it to take the gear . turned it off then back on , it worked well , while i was heading to the company , i passed by a friend who's a mechanic , he checked the A/T oil for me , it turned out to be missing half a kilo , so he added them , after that the car ran smoothly. im waiting for any other sign to take it back to the company . do u think its an oil issue ?

 

No problem with transmission fluid - ck'd many times

 

Originally posted by nds@Jan 4 2007, 06:56 AM
I too have a Subaru Forester and the Sonata.  Both have electronically controlled transmissions.  I have observed what I consider a dangerous situation with the Subaru.  If I start slowly and then try to accelerate hard after I am in motion, it acts like it goes out of gear with the engine revving and no power until it then suddenly catches.  I have felt a little of this with the Sonata, but not nearly to the extent it occurs in the Subaru.  I know from the Forester forum that others have the problem with the Forester.

there was a recall to reprogram the transmissions of the early Sonatas.  Is is possible yours needs to have this done?

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Thanks for your spot on comment about the Subaru. I feel 10 X as safe in the LX, and the Subaru was sold to me on safety. The only thing I miss is the AWD. I am tired of spinning a Rear tire on a FWD Car. :w00t: :w00t:

 

do u think its the converter ?

 

Did the engine race when it was slipping or did the rpms hold with no engagement? I would drive the car around for a couple of days manually shifting to see if it'll do the same thing.

My car will sometimes pause while shifting into second, but that's before the tranny fluid warms up to operating temperature. I have no other issues with my tranny other than the driveline shudder between 40-45mph. Good luck!

 

the car is already at the dealers

and as for the shifts , when it shifts into second , it acts as if it was in neutral , plus , if u turn it off and then back, u might be lucky so that the transmission works again. its a very complicated issue , and it only has 17600 km mileage :S , plus i wonder why the tranny fluid was missing half a kilo two days earlier

 

just a word of caution, i hope your mechanic used hyundai's tranny fluid to top it off......otherwise it never happened :whistling: you hear me?!?!?! never happened

 

the car is back now , as normal as b4

they told me : "We did some tuning for the gearbox "

and when i got into the car , i noticed everything was back to 0 , so i guess it was a computer fault ??

 

Originally posted by LebSonata@Jan 18 2007, 09:39 AM
the car is back now , as normal as b4

they told me : "We did some tuning for the gearbox "

and when i got into the car , i noticed everything was back to 0 , so i guess it was a computer fault ??

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I'm sure they just reprogrammed something. I'm also pretty sure that everything being back to zero was because they disconnected the battery for a while. Same thing happened to me when they did that while working on my seatbelt assembly. Tripometer, MPG, etc., was at zero.

 

so i assume its not mechanical ?

 

Similar thing happened on my now-gone 04 V6 3.5L Santa Fe which was mainly driven my old lady. Back then I found a tsb at HMC's website that showed how to reset the "already leanred" shifting algorithm in the transmission control logic. Then, the slipping/sudden engagement feel went away. The important thing was that I drove spiritedly right after I reset it so that it learns the way I drive.