2004 Sonata bucks violently trying to shift into 2nd gear

20

Asked by BobandLibby Mar 14, 2018 at 11:24 AM about the 2004 Hyundai Sonata V6 LX FWD

Question type: Maintenance & Repair

I have a 2004 automatic 2.7 v6 Hyundai Sonata LX.  While sitting in the
driveway, My car idles fine and I have no problem reving the engine up to high
rpms in either park or neutral.  I also have no problem shifting to any of  the
gears, nor do I have a problem backing out in reverse.  Driving slow in first
gear also works fine, but when I accelerate fast enough to shift into 2nd gear,
the car bucks so violently that I feel like I’m going to be thrown through the
windshield.  The car never makes it into 2nd gear.  I replaced both input and
output speed sensors, as well as the throttle position sensor, but that did not
help whatsoever.  Any ideas?  Does this sound like a bad transmission
solenoid?

1 Answer

20

Problem Solved. As a last resort I decided to change all five transmission solenoids. This was my first time working on a transmission. Surprisingly, it wasn’t as complicated as I was ancipating. To gain access, I only had to remove the battery, radiator hoses and fans, and loosen/move the ignition coil assembly (3 bolts) out of the way to gain full access to the side transmission cover. From some Youtube video, I was anticipating having to drop the subframe, but it wasn’t required for my Sonata. Upon closer inspection, I noticed an O-ring failure on one of the solenoids. The O-rings on the other solenoids looked like they were starting to go bad, as well, so I replaced all five. My car now shifts smooth as silk.

2 people found this helpful.

Your Answer:

CarGurus Experts

  • #1
    sumcon
    Reputation
    5,940
  • #2
    clifford
    Reputation
    2,220
  • #3
    toDumbToNotKnow
    Reputation
    2,070
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Hyundai Elantra
163 Great Deals out of 3,544 listings starting at $2,995
Used Honda Accord
40 Great Deals out of 910 listings starting at $1,599
Used Toyota Camry
52 Great Deals out of 985 listings starting at $2,212
Used Honda Civic
180 Great Deals out of 3,705 listings starting at $1,995
Used Nissan Altima
22 Great Deals out of 716 listings starting at $1,400
Used Kia Optima
16 Great Deals out of 254 listings starting at $3,999
Used Hyundai Tucson
98 Great Deals out of 2,246 listings starting at $3,990
Used Hyundai Santa Fe
58 Great Deals out of 1,604 listings starting at $3,950
Used Toyota Corolla
108 Great Deals out of 2,035 listings starting at $2,795
Used Chevrolet Malibu
50 Great Deals out of 1,139 listings starting at $1,295

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.