Definitely some changes in transmission behavior '22 vs '24

I spent 3 yrs in my '22 ORP so I can definitely say that the transmission in my '24 ORP behaves differently.

Specifically, what I have noticed is a seeming "reluctance" to shift to a higher gear. It seems to hold a lower gear much more persistently than my '22 at even/neutral throttle with no braking. This is happening on both downhill and uphill grades.

I'm assuming it's purely software/trans-tune related?

Just curious if anyone else has observed such?

 

I can't speak to any comparison with a '22 but my '24 seems to upshift at the earliest possible opportunity.

Perhaps something else could be happening? I'm sure you are very familiar with the 4R but just to rule out - it's not in S4 by chance?

 

How many miles, because there is some learning involved. Mine had the same hesitation initially but it was gone after a bit.

 

Really? I didn't think that level of technology/intelligence existed in a 4R. But maybe you are right, mine actually still has less than 100 miles.

 

It learns your driving habits.

 

Automatic transmissions adjusting their behavior automatically has definitely been a thing for a while, that’s probably the case as mentioned.

 

To this day, can't understand what y'all talking about... my '23 shifts fine, even with cruise control on. It doesn't hold gears, downshift, etc.

 

Shoot man, these ECU will learn and change all sorts of tuning for the engine and trans based on how you drive. It takes at least the second full tank of gas to start seeing the changes. If you beat on the vehicle, like drive aggressively, the trans will shift at higher RPM and have a different timing and fuel map. If you drive like a pawpaw it will change trans shift points, line pressures, timing and fuel tuning to match the lower RPM and less aggressive timing tables. Yes it learns, yes it will change, its quite smart.

 

I had 2010 SR5 for 11 years, then 2022 TRD Off-Road for 2 years and now I got 2024 TRD Off-road since April. Honestly I didn't notice much difference in transmission shifting between all of them. KDSS seems to make ride firmer, that's all : )

 

Every vehicle is different

 

Yeah, got to give it more than a couple hours of driving time for all the computers to adjust themselves. Once past break-in mileage, drive how you normally drive and it will probably settle into the same transmission behavior you previously saw.

I’ve never had any weird behavior either. But, it was pretty neat to see how different it behaved when I took mine through colorado. There were a few times on long climbs on the interstate, where I was almost wide open throttle in 4th gear, and it did not shift down into 3rd. It made sense for it to hold 4th, since with the lower power from altitude, 3rd would have probably sucked just as bad lol.

I don’t live at altitude, so in my usual driving, it will normally kick down into third pretty fast once I start adding throttle.

 

thank you, this is enlightening. I know the technology has been commonplace forever and common in most vehicles, I just never thought it made it's way into our 5th gen dinosaurs

 

Even back on my old 99 Accord, I remember it supposedly had “adaptive” programming. I never quite understood it, because I’m used to the idea of me learning the machine, not the other way around. I always figured it would create a feedback loop where it’s undoing what I’m learning about its throttle and transmission response.

Who knows…the whole adaptive thing probably does eek out some amount of efficiency. I can’t imagine the “learning” algorithms are all that complex though.

 

Not going to lie - I'm pretty damn happy with the transmission in my 24 Pro. It doesn't downshift too early, on some hills it holds OD, and around town it isn't clunky at all. Miles ahead of the transmission in my old Grand Cherokee Hemi.

 

My 2024 SR5P shifts beautifully, consistently and predictably. Downshifts as I would like almost all the time. I live at 7000 altitude. It has about 12K miles. I'm a long time manual driver and am very particular about auto transmission behavior.