Sonata I45 (YF - 2011+) :: Downshifting On Uphill
Dec 22, 2015
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?
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Just 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.
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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.
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Been trying to save my miles on my 2011 GLS because I'm right at 100k (99.2K to be exact) and had a feeling something would be going wrong soon. Already had short block replacement, both CV axles replaced, steering columns, seized calipers, transmission sensors, and other repairs all done under warranty work for this stinker.
Driving to work today hear a clunk as I am driving uphill, tachometer immediately goes to zero, engine begins violently shaking, and traction control light comes on for some reason. Had my OBD scanner already plugged in and it pulls P0336 code for a crankshaft position sensor. Fortunately was close enough to home so that I drove it back and took the train to work. Probably going to take it to dealership tonight. The clunk and violent idle leads me to believe its more than a sensor problem. Car has had issues shifting over past month, but was so sporadic and not able to ever be replicated. Would maybe have a hard shift once every 2 weeks. That's about it.
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Having downshifting problems with REbuilt transmission. Is there a FIPL sensor for the 4r100? I was told to check all engine codes first, but i just have a EBPV sensor code, but removed the valve when I installed the GT38R turbo...
Rebuild:
- Tugger kit
- triple disc Billet torque converter
- New clutches and seals,.
- Banks Trans command module
... I also have a 6-pos tuner.. I had a Super chips tuner too and it has ALWAYS had the downshifting on acceleration on up-hill grades!!
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I'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.
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When 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
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i 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???..
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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".
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My 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.
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I have a 2003 VW Eurovan that had it's transmission rebuilt in 2011. In 2012, we were going up a steep mountain road approx. 25 mph and the van downshifted into first gear. We tried everything from speeding up to pulling over and letting it cool down to turning the engine off and on. It would only upshift into the correct gear when we reached the crest of the hill and started going downhill. As I live in San Diego, there are no hills high enough to reproduce this with city driving and so it never happened again until we went back to the same place this year and at almost the exact same spot on the road. We took a trip later in the year to Oregon where we encountered many uphill grades and each time we hit a steep part and going around 20-30 mph, the van would downshift again either into first or second gear, and each time upshifting when we started going downhill.
At the end of this last trip, a new whining noise appeared and is present everyday we drive and gets louder and higher pitched the faster we go. We have taken the van numerous times to the dealership who says there are no engine codes to suggest a problem and their last assessment was the downshifting may be an overheating problem and the whining noise was definitely from the transmission indicating a bearing problem and they suggested getting the transmission rebuilt again. The transmission shop states that the transmission is fine by the fact that the fluid is in good shape, the transmission is basically "dumb" and only does what the computer tells it to and therefore it is a computer problem and the whining noise, although new, is just a normal noise that all transmissions make. Each place points me in the direction of the other but neither has solved my problem.
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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!
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I have a 2006 Hyundai Sonata GLS with 118k and just recently my car has started vibrating while going uphill past 55mph. On level ground it's just fine, but when I go uphill the whole car starts to shake. I've checked the motor mounts and they all look good with no cracking (replaced them last year for engine shaking at idle). My only other guess is a bad CV axle. The CV axles are not ripped.
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I've been noticing a metal type 'clanking' sound whenever I am gently accelerating up a hill on my 2.4L.
It doesn't happen all the time though. It's not the usual GDI ticking sound. It can be heard when the windows are open but yet I can not tell where the sound is coming from. It doesn't happen enough that I can replicate it so I haven't taken it in for a check. The car drives fine though.
Sounds when going up a hill? Not sure if it's from the engine or from the transmission getting confused trying to change to the right gear. Perhaps the sound is just normal...
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First off I want to say I love my 11 f350 6.3 srw she's a awesome truck. I pull a small 7x14 trailer for my biz..
(3600-400) is the usually weight, I always use my tow feature. One day last week I start out hit my button in go, but I notice the engine braking/down shifting wasn't working. The trans still shifts smooth n normal the light is on the dash but no tow engage.
I check the transmission wire plug to make sure it'd getting a good connection, it does. I take the rubber boot off next to the shifter look at those wires they look ok not pinch or nothing, so I'm stumped.
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I just picked up a Sport. I've noticed 1,2 quick stutter type thing happening intermittently at highway speed going up a hill. Dealer service probably won't be able to have it happen as it only has happened 3 times in my 400 miles.
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I have a 2015 Sonata SE 2.4L with 15k miles. Sometimes when accelerating, and almost always when accelerating uphill, the vehicle makes a noise that I can best describe as sounding like a grumbling or rattle from the engine. It almost has a "diesel engine" sound to it. I have noticed this going back to when the vehicle was brand new, but I have recently noticed it more.
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I just replaced my OEM battery with a duralast from autozone. The battery had 138,000 miles. Shortly after, the check engine light came on and code says P0106. Map Sensor. Seems like to much of coincidence that this happened. Have read that disconnecting battery cables for 3 hours may do the trick.
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THis is about the 5th or 6th time in the past year (2X in past 2 weeks) that the A/C will not come on. Two times took to Dealer & it worked just fine. Ir worked when I drove it, then parked it for 2 hours, and then it wouldn't work. Parked it, and then it worked fine again.
Dealer has no knowledge of this being an issue.
Similarly, my iPhone does not connect on an intermittent basis - again, always connects when at dealer.
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Should I do an Oil change? I never noticed this before. I have 5897 miles on the oil now.
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Sometimes when I put my AC on it makes a hum. It starts soft, gets louder and louder then fades away.. It's not all the time, one of those hard to diagnose intermittent noises..
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