I have an 09 Sonata that jerks when automatically down shifting just before coming to a stop or slowing to make sharp turn. Car has 130k miles and I've never changed transmission fluid. BTW...it's been a GREAT car!
View 7 RepliesMy daughter has a 2010 Sonata with a 4 cylinder and an automatic transmission. She is pretty frustrated with an intermittent problem. Every once in awhile, especially if the engine is cold, the car jerks while slowing down. She believes it is the transmission when it down shifts. I have driven the car and have not been able to duplicate the problem myself. The dealer recently changed the mapping for the transmission in hopes that would work but it hasn't. The dealer hasn't been able to duplicate the condition either.
View 52 RepliesVW replaced my entire transmission and it still jerks into gear when downshifting to a stop or hitting the gas hard while coasting!
Also, I swear there is now binding while turning a la moteur stepper. New tranny. New rear drive shaft. Allegedly new transfer case (I cannot confirm this though). New new new programming. And still the darned thing vibrates by butt with a downshift that a Bettle with 300,000 miles on the clock would not dare make.
Any reference to the operation of the transmission and the sequencing of the various clutches and other coupling devices with respect to gear selection and engine conditions?
2009 Hyundai Sonata automatic: When downshifting from 4th to 3rd it feels like I hit a bump, or like I just hit the brakes hard for a second.
What could it be? It's most noticeable when the car is cold. I have 82k miles on it, so it's still in the "power train warranty".
At the beginning it was just CEL on. I checked the code and change transmission range sensor but it worked for few days only. Light came back and transmission sometimes stop to shift automatically. D1 on display and driving only on first gear, but when I switch to tiptronic - manually everything works great?!
View 2 RepliesMy Hyundai is giving me a major headache. I bought a 2009 sonata used a few months back. Not long after I got it, I was having issues with it jerking around 20 mph. Sometimes, it would have a few issues with it jerking some when I was taking off. This was only right after the car was started. I took it to a local Aamco. The guy told me that it was a 2-1 downshift pump. He "relearned" the transmission and the problem went away. Now, it is back. At the time, he did some research and thought it may stem from a calibration update they had issued. He didn't have the Hyundai software to try that fix.
View 3 RepliesI've been driving my wife's sonata to work this week and notice as I start to slow down at around 20MPH the car almost surges a little bit. Maybe I am not diagnosing it correctly but it's almost like it's downshifting rough.
View 37 RepliesWhen coming to a quick stop the transmission has a shutter upon downshifting the shutters when you accelerate quick off of a stop light or stop sign. Also quick left hand turn hear a clunk coming from left side wheel. 2015 Sonata Sport 2.4L
View 7 RepliesI have a 2009 Camry v6 and having trouble while driving and you take your foot off the pedal like coming to a red light and give it gas between 25-35 mph the transmission jerks pretty hard?
View 14 RepliesI'm having in not being able to downshift manually. I can shift up with no problem. I have 116,000 miles on my Sonata that I purchased new 8 years ago. I had the (4 cylinder) tranny flushed about 18,000 miles ago. No other issues.
View 1 RepliesI own a 2009 Kia Optima 2.4 Auto. My good friend and his wife own a 2009 Sonata 2.4 Auto. My car has around 40k and his has 50k. We both notice a very strange noise that started well over a year ago on both cars. After driving for a while, then you stop at a stop light or go through drive-thru, the transmissions BUZZ. If you put the car in Neutral or Park, the buzzing stops. Even if you put the car back in gear, it won't make the noise again until it decides to do it again. They both only do this when the transmission fluid is hot. Never does it when they are cool and have not been driven. Both cars have had the transmission fluid changed at 30k and this noise was mentioned to both dealers at the time. Both cars had transmission related TSB software updates done, but nothing changed as far as the noise. Neither car would buzz for either dealer, so they were no support. I just find this odd that it is BOTH cars. Of course they have the same engine and trans, I just wonder how many more folks have this odd ball noise. It really sounds like a power steering pump thats low on fluid. Fluid levels are perfect.
View 8 RepliesI recently had the transmission fluid changed in my 2009 Sonata NF 4 cyl. Current mileage is 60,000 miles. Directly afterwards, the transmission started "sliding" into 4th gear from 3rd gear. I assume that fluid contamination has caused a clog somewhere in the transmission. I have had the tsb done on the car for the transmission and the fluid had been exchanged @ 30,000 miles prior to this service.
View 2 RepliesI have a 2009 Hyundai Sonata V6 3.3. I'm currently about to hit 65k miles. About 2 weeks ago i felt the transmission slipping while I was on the highway. Yesterday my check engine light came on. I took it to my mechanic; according to the reader, the Dampener Clutch System was the problem. This morning when I took the car out, I realized that the Check Engine light went away but still could feel the transmission slipping.
View 5 Repliesi drained the 30000 mile fluid two weeks ago because it was harsh downshifting when coming to a stop... I was curious if others noticed a lot of metal sludge sticking to the magnetized drain plug???..
View 3 RepliesI have a 2006 Hyundai Sonata GLS V6. Recently the area I live in received 2 feet of snow and ice. I of course cleaned off all the snow and ice and started her up. I didn't drive anywhere that day since the roads were not clear. The next day I drove 15 minutes and upon reaching my destination's parking lot, the Sonata went into a jerking motion.
It seemed as if it wanted to stall out, like I was driving a manual. However it's an automatic. I stopped the car, and later when I went to leave it did it again. Once I got out of the parking lot and above speeds of 20 mph everything was fine. No more jerking motion.
The next day, after some time driving it does it again. My car never actually "stalls" or shuts off, it just jerks and once I can press the gas and go, it stops.
There are no odors or sounds and the car only does the jerking motion sometimes.
I have a 4 cylinder 2009 Sonata with an automatic transmission and it does not accelerate smoothly when starting out from idle. A slight touch on the accelerator pedal causes the motor to accelerate hard as though the pedal was pushed down a lot further than "a slight touch". Is this normal or should this car accelerate smoothly? I am wondering if there is a common problem with either the accelerator pedal sensor or maybe with the throttle servo.
View 3 RepliesI have a 1999 Passat 1.8t manual transmission... My car shakes like it's going to stall and sometimes actually stalls when I come near to a complete stop. The car drives really bad... it jerks when downshifting and on accelerating... The performance of the car is crap. also When i put the car into neutral and coast to a stop, the revs will bounce up and down. I posted a couple months ago about this problem and I was told to clean the throttle body. I then cleaned my throttle body and replaced the gasket. This problem went away for about 5 days and then was back again. This problem is the worse when I go to school, which is when it's about 45 degrees outside.
View 9 RepliesUpshifting is fine, downshifting gives me a big thud. Bigger from 3rd-2nd smaller 2nd-1st (I think).
2006 GS430. 120k or so miles.
Dealership replaced solenoid #2, but now say I need a whole new transmission.
I have notice maybe a dozen times in the last few weeks that my 2013 5.0 Screw downshifts at odd times. It usually occurs while coasting around 35-40 mph (in 4th gear and downshifts to 2nd gear) or around 50 mph (in 5th gear and downshifts to 3rd gear). Obviously when this occurs, the rpms jump and when I get into the gas, the truck takes a few seconds to accelerate because it first must shift into the next higher gear. What is causing this?
View 2 RepliesWhen I slow down to stop my 2008 Sonata it jerks. It is an intermittent issue. The car has 95,000 miles and when I called the dealer I was told they would start with changing the transmission fluid and go from there. I read on some other posts of this same type of issue being fixed by installing the latest software for the transmission, but this was related to 2009 & 2010 Sonatas. Is it possible that installing some new software would work on my 2008?
View 1 Repliesis it possible to get the heated seats to come on from a cold start automatically?
If i turned the car off with the seat heaters ON and then used my remote starter; i want them to come on without me having to push the button.