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Hyundai Elantra Transmission Questions

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  • backybacky Twin CitiesPosts: 18,624
    I found this online. It does not look promising:

    On the downside, the automatic transmission requires a special SPF-3 AT fluid sold only at Hyundai. When Dextron is used, the transmission will fail internally.

    http://www.asashop.org/autoinc/sept2004/techtotech.htm

    :sick:
  • grump1grump1 Posts: 27
    Ok, Thank You.
    Grump....... :(
  • My 1999 Hyundai Elantra 2.0 auto shifts through first and second and when it shifts again it seams to be down shifting and I lose speed drastically. This only happens when going uphill. downhill and flat runs great. I start out doing 60 and by the time I get to the top of the hill (about a quarter of a mile) I'm doing a steady 30 mph. This happens on any grade of hill from small to large. From a standstill I can hear it shift from first to second and then to third but it seams to downshift and revs very high and i steadily lose speed until I'm doing 30 mph when it should be third gear and a steady acceleration.

    I have already checked a few things so here they are.
    Transmission fluid and filter change (no plastic or metal pieces or even metal dust in pan) just a small amount of sludge.
    Fuel filter, pump, pressure, and sending unit fine.
    Air filter and throttle body fine.
    PCV valve fine.
    Timing belt was loose but tightened and fine.
    Spark plugs, wires and coil packs fine.

    I have a small exhaust leak but can't seem to find it and a small oil leak which I can't seam to find either.
    It has 140,000 miles on it but the MPG is great so I really love this car and really want to fix it.
    Any help will be greatly appreciated. Thanks
  • grump1grump1 Posts: 27
    WELCOME TO THE HYUNDAI ELANTRA MOTOR -- NO POWER CLUB --... MINE NEVER HAD POWER UP HILLS EITHER IN THE LAST 8 YEARS THAT I HAVE OWNED IT... GET USE TO IT.

    GOOD LUCK....!!!!!!!!!
  • bhmr59bhmr59 Posts: 1,598
    Did you use the Hyundai required transmission fluid? A generic trans fluid can cause transmission problems.
  • grump1grump1 Posts: 27
    the mechanic that changed the filter and fluid used -- dexron3 , he said it would work. :confuse:
  • tenpin288tenpin288 Posts: 804
    This only happens when going uphill. downhill and flat runs great

    I have a small exhaust leak but can't seem to find it

    One thing you might check is to see if your exhaust system/catalytic converter is plugged or partially plugged. I remember seeing from my old days in the auto service field many a loose baffle in mufflers or collapsed manifold or exhaust pipes. Those would create excessive backpressure and loss of power on hills or full throttle. If possible, you could drop the pipe from the exhaust manifold and then test drive it under the problem conditions.Just be forewarned it will be loud and keep the windows open. ;)
  • backybacky Twin CitiesPosts: 18,624
    Unfortunately, your mechanic was wrong. If I were you, I'd show him some posts like this from the Web and demand he pay to repair/replace the transmission that he ruined with the Dexron III fluid.

    http://www.hyundai-forums.com/t5918-automatic-transmission-fluid-type.htm
  • It was doing this before I changed the fluid and filter. That's specifically why I did it. I had this same problem with my 1989 Chevy Beretta GT and changed the fluid and the filter and it fixed it but unfortunately it didn't work on my Elantra.
  • I do have a small exhaust leak that I can't seem to locate but the rest of the system looks fine. Now I was thinking it might be a blocked Catalytic converter so a friend of mine told me to run it at night until its hot and look to see if the converter is red or glowing. He said if it has a restriction that it would overheat and the metal would start to glow when it gets hot but I havn't noticed any redness or glowing when I look at it in the dark. Now if I try what you said and disconnect it and drive it uphill what am i listening for and i disconnect it above the converter right? But wouldn't this cause the vehicle to run poorly due to the O2 sensors not getting the correct signals?
  • tenpin288tenpin288 Posts: 804
    You would not really be listening for anything. The idea is to open up the system and see if excessive backpressure is the cause of the performance decline. Doing so will make it loud and possibly dangerous from exhaust fume infiltration into the cabin, so I do recommend doing so only with open windows. As far as the O2 sensors, they would not get correct info but that should only be a minor problem. If high backpressure is the cause and you open up the exhaust, the performance increase should well outweigh any decrease from incorrect O2 sensor readings. ;)
  • Well I found the exhaust leak. My damn manifold is cracked in 2 places. Looks like I'm heading to the junk yard. $225.oo for a new one is just too much lol.
  • well the car goes into the dealership on tuesday. I found that the manifold was recalled and i can now get it fixed for free. my wallet is sooo happy lol
  • joegiantjoegiant Posts: 90
    Well backy to answer your question at the very beginning of this thread, after reading all 94 posts on here, the majority of which suggest problems with the automatics, I'd say 5 speed MANUAL! :)

    Or does the '09 model have a much improved transmission? As always, TIA for your opinions.
  • backybacky Twin CitiesPosts: 18,624
    The original question was about someone who might have ruined their Elantra's AT by using the wrong tranny fluid. That is not the fault of the transmission.

    The AT in the Elantra has improved over time but it's still a pretty basic four-speed. I am hoping Hyundai will put a more modern AT (e.g. 5AT Shifttronic like the Forte has) for 2010.

    My first Elantra, a 2001 GLS, had the 5-speed. I liked it a lot, until my oldest son, helped by his mother, trashed the clutch ($1300). Also traffic is getting worse every year. So I think I'll stick with ATs, at least until I can be sure I'm the only person in the family to drive it. For instance, my Rabbit's 6-speed Tiptronic is quite a nice unit, for an automatic.
  • iluvmysephia1iluvmysephia1 Posts: 5,663
    ya ever get caught in a traffic jam while Prince's entourage passes through? :shades:

    Yep, Hyundai needs to develop the 5AT Shifttronic for their new world order Elantra's like Kia is plopping in to their Forte's, exactly right.

    2008 Mitsubishi Lancer GTS

  • moparman5moparman5 Posts: 1
    We put an automatic from 1 car into our car. It worked fine in the other car. Now it has a very good reverse and at times it has no forward. When we put it in drive it seems to work fine for 10 to 20 minutes then seems to just disengage when it wants to. On jack stands it will shift just fine then when you stop and put it in park and then put it back in drive it will start to move the wheels and then sort of clicks and stops moving. Any Ideas????? This thing is driving us nuts. We have changed the fluid and filter with the right fluid. The fluid that we drained was red and had no shavings or residue in the pan. We changed the two sensors on the end of the transmission one on top and one on bottom.
  • Just got my 2009 elantra se. Very nice but I notice 2 things with the transmission and I am wondering if it is normal or possibly a problem. 1. After the car sits for 1 to 2 hrs and I put it in reverse or drive, I get a clunk noise coming from the tranny. It is not felt in the car but the noise is there. The clunk doesn't return until I let the car sit again. 2. The tranny makes a buzzing noise for 1 to 2 seconds each time I put it into a different gear. P, D, 2, or 1. It sounds like a gear motor buzzing. Anyone else notice this? Thanks for any responses.
  • mvargasmvargas Posts: 2
    All forward gears working fine but no reverse. Drained/Opened oil pan and saw very few metal shavings - the normal wear and tear. What could be wrong w/ this tranny? Does a bad crankshaft position sensor affect the reverse gear? These cars are known to fail the CPS. Any help would be reatly appreciated. :mad:
  • Hello -

    I recently purchased a 99 Elantra and unfortunately it has tranny problems. I took it to the shop and they gave me the codes for the gear problems (P0731, P0732, P0733, and P0734). They recommend I take it to a transmission specialist. I plan to, but am very curious as to how much this is going to cost. I'm a full-time student and would like to minimize the cost as much as possible. I also ran into an AT recall, but maybe it is not related (details below). I guess my question is roughly what will this cost and what is the best way to minimize the cost if this recall will not help? Also, how long can I postpone it? What should I do/not do?

    Thank you!!!

    Recall Date:
    JUL 07, 1999
    Model Affected:
    1999 HYUNDAI ELANTRA
    Summary:
    VEHICLE DESCRIPTION: PASSENGER VEHICLES EQUIPPED WITH AUTOMATIC TRANSMISSIONS. THE AUTOMATIC TRANSMISSION PRESSURE CONTROL SOLENOID VALVE SEALS DO NOT REMAIN SUFFICIENTLY ELASTIC, RESULTING IN TRANSMISSION FLUID LEAKAGE. THIS LEAKAGE CAN RESULT IN REDUCED PRESSURE APPLICATION TO THE CLUTCHES, BRAKE, AND KICKDOWN SERVO, ALLOWING THEM TO SLIP.
    Consequence:
    SUCH SLIPPAGE CAN CAUSE PREMATURE DETERIORATION OF THE FRICTION ELEMENT SURFACES AND COULD CAUSE THE VEHICLE NOT TO ACCELERATE, OR NOT ACCELERATE AS EXPECTED, WHEN THE DRIVER PRESSES THE ACCELERATOR PEDAL.
    Remedy:
    DEALERS WILL REPLACE THE PRESSURE CONTROL SOLENOID VALVE.
    Potential Units Affected:
    11530
    Notes:
    HYUNDAI MOTOR COMPANY 033
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