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Is there any kind of TCU tune that changes the transmission behavior?

bkw777

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I really hate the way basically all automatic transmissions behave, including this one, but there is nothing all that particular about this one, I don't think anyway.

I think it's mostly the lag in switching from "I want to slow down" to "I want to speed up".

I have counted a full 3-mississippi sometimes with the pedal right to the floor before the vehicle responds. That is just intolerable in traffic. In the middle of other traffic on the highway and sometimes starting from a stop to cross an intersection or get onto a road, that unexpected delay is very frustrating and I end up basically being too close in front of other people that I had no intention of cutting off or getting in their way.

I never have this problem in my dog slow much weaker 3rd gen or even weaker 1st gen, or pathfinder, or anything else I ever owned since they've almost all been manuals. My chevette was like a whopping 90hp or something like that, no problem, even loaded to the gills with weight in back. It's not a power thing but a responsiveness and consistency thing.

Neither sport nor tow/haul mode addresses this. Sport actually just makes it worse. You get the same delay, just now followed by a much stronger over-reaction. The goal is responsiveness to inputs and precise control of the vehicle to put it where you want when you want predictably and consistently, not light a fuse, wait, then uncontrolled rocket launch.

I was describing this to my brother and he said he had the same aggrevation with his silverado, then got some kind of aftermarket tune on the transmission that made it all better, or at least made it much less infuriating most of the time.

Is there any such transmission tune for this powertrain yet? Is that even really a thing in general for any car? A transmission tune that isn'treally just somehow worse than the factory setup?

For instance, I know there are "sport tunes" that really just modify the gas pedal curve so it's like you stepped on it faster and further than you did. It makes the car feel more powerful kinda sorta, merely because a smaller touch on the gas makes the car react harder, but obviously this is stupid and not actually changing anything, and of course there are infinite ways to screw up the engine tune that might feel better in the short term but all it does is kill the engine one way or another. I'm definitely not interested in a transmission version of that!
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bkw777

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I keep forgetting... I have actually not even tried playing with the "manual" gear select that this gear shift already has. Maybe it's actually useful.

You still have a torque converter instead of a clutch of course, but maybe manually selecting a single gear removes some of the "deciding which gear to switch to" delay.

Though, ... there are not 8 numbers there, just a + and -. With a manual you can go from any gear to any other in a single motion in much less than a second, no counting up and down. I can't imaging clicking sequentially down 3 times is all that fast... And it's an 8-speed, each gear is smaller. If I want to drop down to punch it for a second, it will probably be at least 2 gears not just 1. I haven't tried yet but I wouldn't be suprised if I can't do a multi-step process like that any faster than the auto would have itself.
 

Maverick66

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If you wanted a vehicle that is capable of instantaneously reacting to fuel pedal input perhaps you should have possibly considered an EV.
It’s a 4Runner not a Tesla, that is the adjustment I am preparing myself for after 5.5yrs of a MYLR.
 

Nodak

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I keep forgetting... I have actually not even tried playing with the "manual" gear select that this gear shift already has. Maybe it's actually useful.

You still have a torque converter instead of a clutch of course, but maybe manually selecting a single gear removes some of the "deciding which gear to switch to" delay.

Though, ... there are not 8 numbers there, just a + and -. With a manual you can go from any gear to any other in a single motion in much less than a second, no counting up and down. I can't imaging clicking sequentially down 3 times is all that fast... And it's an 8-speed, each gear is smaller. If I want to drop down to punch it for a second, it will probably be at least 2 gears not just 1. I haven't tried yet but I wouldn't be suprised if I can't do a multi-step process like that any faster than the auto would have itself.
and it gets worse the more gears. our 23 tundra with the 10 spd is a pita to try to figure out how to manually engine brake.

i put it into manual mode going down a certain hill, it starts in like 5th or 6th depending on speed, i down shift down to 4th, not enough braking, change to 3rd, still not enough, drop to 2nd and its still not enough. but i dont dare try to downshift to 1st, not crazy enough to try.

i mean going down the hill in 2nd i am still pushing 30+ mph and i want to be closer to 30mph or slightly less.

on our 2018 tundra it wasnt that hard to figure out what gear to use on that same hill, now its pita to figure out.
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