I'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 RepliesJust picked up a 2012 GLS two weeks ago. So far I like the car. Unfortunately, I do about 40 miles a day of traffic driving. I have noticed the car seems to downshift from possibly 4th to 3rd right around 35mph. This downshift is noticeable and the engine has to rev to match the change. It is not a high rev, just a noticeable engine braking. Is this normal? I dont feel like anything is wrong just seems like the computers are not sure when to downshift.
When the car comes to a complete stop with your foot on the brake, does the car lower its rpm by 100-200pms? Seems like this is a gas saving technique. I have noticed it when While at a light and I lift my foot slighty the car feels like either the brakes are grabbing or the rpms are to low.
I travel this interstate route often that is somewhat hilly. I always use cruise control. When I got my 2007 Sonata (I4) 4 speed A/T and traveled on this road I never noticed much down shifting. Later my daughter bought a 2010 Sonata (I4) 5 speed A/T, and on this road I noticed the Xmission downshifting sometimes. When I got my 2013 (I4) 6 speed A/T, I started noticing it more often downshifting. I'm sure thats since the final drive ratio is much higher in each successive car. When my wife is driving she doesn't notice but I can tell even from the passenger seat. I can stop the downshifting by putting it in manual mode. but I see the RPMs increase somewhat. I assume thats from the TC lockup disengaging and the CC trying to maintain speed if a long hill. I suppose if the hill was long enough and steep enough that I would eventually lose speed but that doesn't occur(very much). If that is more economically that letting it just go ahead and downshift. Am I the only one annoyed by this constant up/down shifting?
View 21 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 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 RepliesI 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 RepliesSo, 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.
View 33 RepliesI have a Sonata 2011 YF , with 2.4 GDI and 58,000 miles. There is an engine's oil leakage dripping on the ground exactly from the area between the engine and the transmission gear box where probably the o-ring ( i assume) is placed. The car is no longer covered by warranty.
The workshop guy says that the O-ring (i am not sure what exactly is called in English) needs to be changed and that process will have to drop down the whole gearbox (which is expensive and rather unsafe to) , so i am thinking about any other solutions that might be a great deal (using engine oil with more thick viscosity 10W50, 10W60 since i am living in an extremely hot conditions)?
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.
View 6 RepliesI have the Sonata 2013 GLS and I've noticed the transmission is slipping. I drive it hard.
So the guy said he was going to call me, never called me back. I called 3 times and no one knew what the 30k service included. it was a simple question, I just asked if they could check when was the last time I had a transmission service.
I tried checking the level but it has no dipstick. what should I do? my car has 54,000.
This morning while driving on the freeway, the the transmission stopped shifting into 6th gear. This was at 70 mph. The only way it would shift up to 6th is by using the manual mode, however after manually shifting to 6th I moved the stick back over and it immediately downshifted to 5th at 70+ mph. Concerned, I pulled off and turned the engine off. After i restarted the engine, I continued to my destination and the trans shifted up to 6th on its own. The car has never done this.
View 3 RepliesI was wondering if there is a dipstick for checking the automatic transaxle fluid. I have searched my car and the owner's manual but have yet to find anything that addresses the auto transaxle. If I have managed to overlook it just give me a page number in the manual.
View 10 Replies2011 w/ 80k 6 spd man w/column start.
The last couple of months getting first crank attempt symptoms. Cranks fine but won't turn over. 2nd time fine. No OBD codes. Other times np at all. But today big problem.
- Started fine @ 5 degrees F (unusual for area)
- Warmed up fine
- Left in parking lot for 10 min
- Attempted start, could not. Then again the next 8 times.
- Finally wore down battery. Had it towed to dealer (I could feel the pocket suction)
Explained issue to dealer. 3 hrs later they called. Said it was the battery, had only 290 cc left. I explained before I wore it down there was plenty of power avail. Whatever, screwed anyway -- pay $115 diag or $149 for battery, just take the battery I said.
Took it home, seems fine for now but explained if I have to take my very sick son out in cold weather tomorrow there will be repercussions. Anyway, the whole situation is bizarre.
I've looked on other threads with auto tns and brake switch issues but that does not apply to manual. Only requirement is step on clutch. I read about crankshaft sensor but no codes. Only thing I found was perhaps loose fuses or wiring but dealer said they checked that and whole system is good.
My car has developed a strange engine/transmission shudder that occurs only between the temps of 32-50F. It happens when the car is still warming up, when I pull up to a red light and put my foot on the brake pedal the front end makes a vibrating/shuddering noise. You can only hear it from the inside, it sounds like something under the hood or maybe dash is vibrating.
If I shift into neutral or park it goes away. It looks like the RPM drops in drive, but it won't happen when the car is warmed up or if its colder (20F) or warmer out (50F). I recently installed a front strut bar, but I'm not sure it's responsible for causing the vibration I'm hearing.
I checked the oil level this morning, it's right at the full mark. I might try some injector cleaner but it's worth noting Hyundai recommends frequent spark plug replacement in these engines. I believe the manual states to change the spark plugs at 45K, more frequently if the car idles or is driven at slow speeds. I've also seen the 2011 manual indicate to change the plugs out at 22.5K.
Have this problem when the temperature is below 30F? This problem appeared one day when the car was parked outside overnight and the temperature dipped into the 20s. It refuses to upshift to 2nd from 1st unless driven for 10 minutes or so and will grind when downshifting to first even from 3 mph. The upshift to 2nd feels like a wall blocking so I just end up shifting to 3rd straight from 1st until it's warmed up for 10 minutes or so. Worn syncros? Shift fork/linkages? Dragging clutch? I'm sure the dealer will want to replace the fluid first but new fluid will not fix mechanical problems if indeed that's what it is. Strange part is that both 1 and 2 both started to have the problem at the same time so how can both synchros go out at once and this problem only appeared this winter and not last winter so it doesn't seem like its an inherent problem from the start.
View 8 RepliesI have a 2014 Sonata GLS. This has happened 3 times so far. I often drive around looking at houses for sale etc. Sometimes I drive for 1 to 2 hours, usually low speeds under 20 to 30 mph.
So I come to a stop, start to accelerate and notice my transmission is having trouble engaging, I liken it to transmission slip, like winding up to get the vehicle to move. I also notice my dash gear indicator light is blank. No "D" in the display box, just empty. I stop at a safe spot, put the vehicle in park.
It will not release from park when I try to shift into gear again. I decided turn the vehicle off, re-start the car, and all is well, tranny works, dash indicator is back and all is good.
I drive the vehicle mostly at highway speeds to/from work with no issues. Each time this has happened its after driving at that low speed for at least an hour and a half or more. I haven't taken it to dealer yet.
Car intermittently shifts very rough and jerky. Just took on a long vacation trip and every AM when it was cold it shifted hard them smoothed out once warmed up. Got home and now it is doing it all the time. Dealer said do the trans flush...I did it and it made no difference. Is this a common problem with this model? Mileage is 39,800...not sure I want to buy this car at lease end.
View 15 Replies2012 Limited 2.0T. Bought it CPO (certified pre-owned with 12k miles). Current mileage 37,400.
Background ... Wednesday night, transmission started shifting funny. It felt like a delayed shift. RPMs increased by a few hundred before a harder engagement into the next gear. More noticeable between 2-3, 3-4. Also harder engagements in down shifting. Thursday, same shifting problem and CEL came on. I couldn't find my scan tool, so stopped by Autozone. Registered a P0711 (Transmission Fluid Temp sensor circuit). Called the dealership yesterday and dropped vehicle off. Picked up last night. According to the paperwork, the code that was present was a P0705 (Switch Assy-Transmission Range). Supposedly, the sensor was replaced and code cleared.
Driving home, the CEL was / is currently off. However, the transmission still isn't shifting properly. I am fully expecting the CEL to come back on. Never had an issue with the transmission indicator lights next to the shift selector (which I believe the P0705 symptoms were). On the printout I got from the dealership, it states "PLEASE NOTE GDS PRINTER NOT WORKING BEING REPAIR NO PRINTOUT AVAILABLE". I think dealership is just looking to milk some money from Hyundai.
Side note.... OE battery, which was replaced with another OEM when I bought the car 1 year ago, was replaced with a Die Hard yesterday.
So my car has recently begun having an issue shifting hard into drive after it warms up. It doesnt shift weird in any other gear or while driving. I had the trans temp sensor replaced last year under the tsb due to it shifting weird in all gears and a CEL. I was thinking either the fluid level or another bad sensor.
View 2 RepliesNoticed cup holders above the transmission a little warm. I have a 2011 hyundai sonata se; when I drove a regular sonata I didn't notice the cup holder getting as warm as my car.
I have also started to notice that the transmission shifts into 1st gear a little harsh vs the rental sonata as well. I did do my own transmission drain and fill with Amsoil fluid. Why its shifting like this?
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.