Whoa! Don't do this with your tranny!

[Jimmmmbo!]

I may have missed this in the 20 million posts for the Genesis, but I'll post this anyway.

Climbing a 5%+ grade in the mountains of Utah under cruise control at around 75, I thought I would see if I could get the my 2012 V6 to hold 8th gear by putting it into manual shift mode to reduce gear searching a bit.

Not a good choice!!!

Going just a few ticks under 70, the tranny suddenly downshifted all the way from 8th to 3rd gear!!! I quickly shoved the transmission back into auto mode and it upshifted to a more reasonable gear. I didn't not see the engine exceed redline on the tach, but it was close.

I don't expect perfect performance from the car in this rather unique situation, but this was just "a bit" unnerving and not what I would expect any auto-tranny car to do.

The tranny logic was reflashed with latest firmware just a few months ago.

 

[zielritter]

I may have missed this in the 20 million posts for the Genesis, but I'll post this anyway.

Climbing a 5%+ grade in the mountains of Utah under cruise control at around 75, I thought I would see if I could get the my 2012 V6 to hold 8th gear by putting it into manual shift mode to reduce gear searching a bit.

Not a good choice!!!

Going just a few ticks under 70, the tranny suddenly downshifted all the way from 8th to 3rd gear!!! I quickly shoved the transmission back into auto mode and it upshifted to a more reasonable gear. I didn't not see the engine exceed redline on the tach, but it was close.

I don't expect perfect performance from the car in this rather unique situation, but this was just "a bit" unnerving and not what I would expect any auto-tranny car to do.

The tranny logic was reflashed with latest firmware just a few months ago.

Yeah, it'll do that in manual mode if you smash the gas to the ground too - 8th to 3rd instantly.

What does the new logic help with out of curiosity? I haven't had my ECU flashed since I bought the car in October 2012.

 

[MrH42]

If you put it over to manual mode, it will change the shift parameters for top performance. Almost hitting redline isn't a problem at all. It won't let you downshift to a gear that would put you well past redline. There's a rev limited anyways.

Don't be alarmed, it's all normal operation.

 

[jebaril]

Good to know, since I did the same damned thing. These Rocky Mountains.....

 

[Jimmmmbo!]

If you put it over to manual mode, it will change the shift parameters for top performance. Almost hitting redline isn't a problem at all. It won't let you downshift to a gear that would put you well past redline. There's a rev limited anyways.

Don't be alarmed, it's all normal operation.

While I understand your perspective, I just don't hold that much trust in a manufacturer to understand and control every situation that its vehicle will be subjected to.

I agree that possible damage to my engine/tranny is low, as long as I can trust the tach reading and firmware logic. But I think it's worth mentioning here so others know it's an unusual occurrence that is worth thinking about if they value the long-term reliability of their car.

 

[Jimmmmbo!]

Yeah, it'll do that in manual mode if you smash the gas to the ground too - 8th to 3rd instantly.

What does the new logic help with out of curiosity? I haven't had my ECU flashed since I bought the car in October 2012.

It's not clearly stated from what I've seen, and having lost free access to Hyundai's TSBs complicates my response. Mark may know more.

However, I suspect it is to improve "responsiveness" to "driver input". IOW, it won't take as much of a mash of the pedal to get a downshift and "move-out" to your expectation. All within reason of Hyundai's MPG desires, of course.

Personally, I haven't noticed enough of a difference (if one even exists) to justify the firmware upgrade, if that's what you're wondering.

 

[zielritter]

It's not clearly stated from what I've seen, and having lost free access to Hyundai's TSBs complicates my response. Mark may know more.

However, I suspect it is to improve "responsiveness" to "driver input". IOW, it won't take as much of a mash of the pedal to get a downshift and "move-out" to your expectation. All within reason of Hyundai's MPG desires, of course.

Personally, I haven't noticed enough of a difference (if one even exists) to justify the firmware upgrade, if that's what you're wondering.

Thanks. Yes, just wanted to know if there was a tangible difference. I won't bother scheduling a visit solely for a flash if it's not a major improvement.