Yes, it's the downshifts from 3-2, and then 2-1.Sounds like the downshifts from 3-2 and 2-1. Can you confirm on your tachometer that the needle jumps at those moments?
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Happens at least once every time I drive. I’ve tried it in eco, normal, and sport and it is more frequent in eco, then sport, and the least frequent in normal. I noticed it also happens more when it is warmer out and the A/C is on. A buddy of mine has an 09 sonata and his actually just started doing the same thing. They reflashed the transmission software or something like that and he said it’s been good since. Think I’ll bring it in and see what they say.I would definitely get it looked at if there is a clunking sound. Does it happen every time you decelerate?
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Happens in sport mode, if I’m using the slapshift it doesn’t do it as I’m in charge of the shifting, but when it’s in the normal automatic mode, it does it no matter what mode it is in.Is it easy to replicate?
How about if used the sportshift mode?
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Glad you figured out the issue, That’s definitely a strange occurrence!Turns out a lot of my torque loss and lunges during the deceleration problem was that my variable intake solenoid was completely unplugged. How this happened, I have no idea. But I was covered under warranty and they took care of me. The mechanic explained that it was fudging with my fuel air ratio, since the 'flaps' for the intake were not responding properly. I used to have major power loss on hills and in certain gears. I hope this solves it all for me. Test drove for a bit and seems a lot more fluid in all gears. Will update after a road trip I'm about to take!
Did you ask them to reflash the modules for you? After they reflashed my TCM the shifts got smoother, but my throttle response is slow and sluggish. I feel like I have to push the pedal down at least a quarter of the way to get any sort of power out of it. I drive my dads 2014 sonata and it’s a completely different story, and his takes off like a bat out of **** compared to mine.The dealer should be able to look up the VIN in the Hyundai database to see if all ECM and BCM updates have been flashed. We bought our '15 new and it had, iirc, 3 or 4 different flashes performed in the first year.
Drove a LOT better after all were done. Better throttle response, shift quality, that sort of thing.
As delivered new the '15 had very sluggish throttle. After the reflash it was much improved. I did ask them to perform the TSBs. All of them.But there was no push-back as it was a new car and Hyundai had been hearing from many customers that the acceleration was "flat".Did you ask them to reflash the modules for you? After they reflashed my TCM the shifts got smoother, but my throttle response is slow and sluggish. I feel like I have to push the pedal down at least a quarter of the way to get any sort of power out of it. I drive my dads 2014 sonata and it’s a completely different story, and his takes off like a bat out of **** compared to mine.
