Sonata I45 (YF - 2011+) :: Transmission Clunk When Downshift
May 14, 2013
2011 Sonata Limited ... I have just under 60k miles and did a tranny drain and refill at 24k and 55k. Just had the brake light switch replaced. For some reason when cruising with the car in overdrive, if I let off the gas to decelerate and ease into the gas again, I get a real hard down shift and shift. So every time I get on the gas again it is either kicking out of overdrive or downshifting and shifting back immediately. 99% of the time it is a hard thump. When I have the cruise set I do not notice this at all. It does it in ECO or out of ECO. This is new and I started noticing this after the brake switch replacement.
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Well, After reading about the weird transmission issues these cars have...mine finally started to do it. It will clunk, shake the car when it shifts and downshift for no apparent reason. All of this does NOT happen all the time. The noises that come from my transmission do though.
I can have the car in Drive and have my foot on the brake and I can hear a grinding/low power steering fluid like sound that comes and goes. Its worse when I shift from Park to Reverse though. It sounds like air being released followed by a bunch of faint grinding noises.
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I have a 2011 Sonata GLS with 86k miles. Sometimes, like once every 2-3 days, when I start the car, nothing appears in the box that says "P, R, N, D". The transmission also acts very strange. I often don't notice the blank box when I start the car, but immediately notice it when I put it in reverse or drive. There is an awful "clunk" from the transmission, and the car drives like I'm driving it through 6 inches of mud. I stop, put it in park, restart the car, the problem is gone.
The dealer said if it is a problem with the shift lever, that is not covered under the drivetrain warranty. I really don't have the money for the dealer to do expensive diagnostics/repair.
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I was driving up a fairly big hill in Connecticut using cruise control (65 mph). The transmission downshifted, and the car started to rev (speedometer and tachometer) and slow down. I then felt a clunk and the car started to go again. The car kept on doing the rev up and then clunk as it gradually slowed down. Putting the car in Park caused a grinding noise, and Park did not keep the car from rolling. What did I break?
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So the problem is that I have a jerky downshift 3-2 and 2-1 that can be felt by everyone in the car (car pushes forward on downshift) until the car warms up. When the car is warm I can feel it slightly at times and feel a clunk when shifting down 3-2 and 2-1. On up-shifts at times the shifts are shaky from 1-2 and 2-3. I have brought this forward to my dealership as well as another one. They all performed software updates and reset the adaptive learning. However every time I got my vehicle back after this procedure I found the A/C was on full blast. So the initial drive by the tech after the reset was learning while the A/C was on. Would this be causing the weird shifting I experience while the A/C is off. I seem to notice a better shifting when the A/C is on but this may just be me trying to reason why my transmission is behaving this way. I drove other 2015 Sonata's and they have much better shifting than my car and no hard jerks on downshifts.
Both dealers have felt the downshifts and have come back and simply said "We've done all the updates and reset and learning. This may just be a normal characteristic of the car." I told them that a brand new vehicle in this day and age shouldn't be shifting poorly when compared to an older vehicle with 300,000 km (my old Honda Civic which are prone to transmission failures). They responded casually saying you can go and get a second opinion from another dealership if you like. I am furious with their responses and just left it at that. I need to know how to get this resolved and if this is indeed something I should expect from my Sonata.
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I recently just purchased a 2011 Lexus RX350 AWD... I would like to ask on the downshift while slowdown the car.... Every once in a while I feel the tranny down shift while slowing down... It's not harsh or anything, but just enough to have a slight feel. Like a backlash? Is this normal? I also have 09 GS350 AWD.. It's so smooth that I can't feel the downshift at all...
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The cruise control on my 2013 works as I expected.
However the cruise control on my 2016 Sonata does not.
When driving at highway speeds (65 to 70 mph) in cruise control and the shifter set on "D" (drive) the transmission will down shift to 4th speed whenever I go down hill.
This might be intentional as a way to keep the car from exceeding the set speed, but I have never heard of this and it would seem to place more wear an tear on the transmissions.
Do the down shifting is engineered in or if it is a service problem that I need to have addressed...
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Started out clunk sound only if going over speed bump, or bumpy road. Now more often with slightest road bumps.
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2011 Sonata, 42,000 miles. Every now and then the car wont start. Press the start button, everything lights up. Instead of the car then starting I hear a small clunk and then no start. I DO NOT get the "Press the Brake pedal" message. The last time this happened we tried repeatedly to start with no luck. The car then sat for a day. I tried it again with no luck. I them removed the battery clamps and cleaned the battery terminals, reinstalled, put a Start/charger on and tried it again, with the same result. I then opened the engine compartment fuse box and attempted to remove the two "start" relays. They would not come out, but I was able to jiggle them slightly. The next attempt the car started normally. Started normally again this morning.
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A few weeks ago I noticed a 'clunk' noise when turning the steering wheel. It only did it the first turn on a trip. Over time it has gotten worse - the sound is the same, but it happens for several turns, maybe 10 or so, before it stops. After the car sits, turned off, for a while, the cycle starts again.
I replaced the rubber coupler on the MDPS, but my old one looked fine, and it made no change in the noise.
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Noise is coming from the front suspension. You can hear it at :11 after i come to a stop, then drive over a dip. The dealer has told me it is the front struts. It's the 2nd time I've taken it to the dealership, the first time they could not replicate the noise so i am surprised the technician was able to hear it this time, and I don't want to spend money on strut replacement if it isn't the cause.
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I'm a 2nd owner of a 2011 Sonata, and am currently at 99,800 miles. I have an extended warranty (so I've been told) that covers powertrain I believe until 100,000? When turning the wheel to the right then left, or vice versa, theres a clunk/thud sound produced from the steering column.
I am assuming this is not normal. Will my hyundai dealer cover this since it seems to be a common annoyance on these cars. Is it dangerous to not get it fixed?
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I have a 2011 Sonata GLS with 40K kilometres that's making a "clunk" every time I enter a driveway on uneven path. The mechanic that changes my tires confirmed that it's the right front lower ball joint. It's either loose or worn? Are the ball joints covered under Hyundai's warranty? Can I get this repaired free of charge?
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So out of no where I have a Clunk type sound coming from my steering column. But only when I turn the steering wheel five percent either way. Steering is still 100 percent responsive though.
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OK, I thought I saw where people were lubing certain areas for a clunk but it was a squeek.
Seems like over rougher terrain my 11 sunroof tends to clunk. However the painful part is I can't reproduce it on demand, clunk or a rattle. Its deeper in tone for sure and not a squeak.
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Just bought my new ride last week and already noticed strange clunk sound when braking. It doesn't happen all the time but seems to happen when I make full stop, like at a stop sign or stop before turning.
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So, I took my 2011 Sonata SE in for service because I was having some transmission problems (18,000 miles). After starting the car and putting it into drive or reverse, the car would make a large clunk noise and surge forward or reverse. This happened only twice. I was also periodically getting some very hard shifts. They told me that they were getting an error showing a bad temperature sensor for the transmission fluid so they had to replace it. A lot of this started after the update. We will see if that fixes the problem.
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I don't do too much long range driving but i notice about a week ago i was driving about 70mph for about 40 to 50 miles.. and when i got of at the exit i started to slow the car down and during the down shift i felt the car to a little jerk and clunk with a bit of hesitation during it.. Today i was doing another long trip and it did the same thing..
i use the highway a lot but usually on it for maybe 5 to 10 miles and it never does it.. I called the dealer and explained it to them and he said he would have to drive the car. and i know since it only happens on 40 plus mile trips the dealer isn't going to go for a test drive that long..
The next long trip i have might be tomorrow nite headed to AC for some gambling so i am going to try to remember to bring my camcorder so i can try to record it for the dealer..
car is a 07 wolfsburg 2.0t automatic completely stock..
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My 3.6 4motion has a rough downshift, 4th to 3rd. I can feel the clunk. The service department (which has been otherwise great, at Gurley Leep in South Bend, IN) says it's "within specs." And no TSB. I know we've discussed the TSB for the rough downshift on the 2.0T. Anything on the 3.6 4motion?
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Lexus IS350 ... Noticed a reasonably quiet clunk from the car when coming to a stop? It happens when the transmission automatically shifts into 1st gear with your foot on the brakes.
I noticed that in my car, you can feel a slight lurch forward as the transmission downshifts into first when approaching a stop sign. If I am barely on the brakes, I feel the slight lurch but don't hear anything. Under normal braking, that slight lurch happens along with a clunk. You wouldn't hear it with the radio on, but it's very repeatable and with the windows down you can hear it as well coming from under the car somewhere.
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Or just can I just replace and go. I'm having some issues with trans on my 06 gs430. It's having a downshift clunk/jerk when coming to a stop. I just purchased a used trans, but would like to see if it could be ecu related. I have seen other comments from other member that they replaced the trans, but still the issues were present. Some stated that there was some issues with the ecu holding the trans solenoid longer then the usual.
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