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clostridium

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The dual motor clunk is ridiculous … and more so since Rivian has not addressed it. An easy software fix would be to add a Conserve mode with front wheel drive only for highway travel. Then, change AP mode to make both motors be constantly on. Rivian does this with my R1T Quad and I can’t see why they can’t do it with my R1S Dual.
It is confusing what the Rivian overall strategy is on these modes on gen2 performance vehicles

on one hand they gave us automatic moving to 2 wheel drive to save energy

but on the other hand they make us pick sport mode to get full acceleration.

perhaps provide some settings to allow use to pick auto 2wd yes/no without having to swap between driving modes and also separately auto full performance?
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waitingonanr1s

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Strangely, I've had nothing but good experiences with Gen 1. If it's unsure, it disengages and tells me to take over, no swerving. The only Brown Pants moment I've ever had with a Rivian was a Gen 2 loaner, and I never trusted it again.
I never had bad experiences with Gen 1 - it's just limited by its hardware (poor cameras, inferior radar visibility, slower processing). Gen 2 doesn't slam on brakes for shadows, doesn't run up on traffic and slam on brakes at the last minute, and has full visibility of the cars around it. I never felt that any of those sporadic behaviors made Gen 1 a bad system - just a limitation of its hardware (partly caused by them trying to launch during the pandemic.). Neither is perfect - but no ADAS system is.
 

SoCal Rob

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doesn't run up on traffic and slam on brakes at the last minute
This is exactly what kept me from using ACC on our Gen1. Unless I adjusted the gap when approaching slowed/stopped traffic, it created stress for me, any passengers with me, and probably the driver of the vehicle in front of me. ACC on Gen2 behaves rationally and smoothly, even with the smallest gap set.
 

clostridium

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Why won't / can't they just give us texting in the next update?!
I know. They won’t do CarPlay but then won’t provide some basic functionality another way. Yeah you can use Siri but it’s annoying and nice to have more integration.
 

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HaveBlue

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It is confusing what the Rivian overall strategy is on these modes on gen2 performance vehicles

on one hand they gave us automatic moving to 2 wheel drive to save energy

but on the other hand they make us pick sport mode to get full acceleration.

perhaps provide some settings to allow use to pick auto 2wd yes/no without having to swap between driving modes and also separately auto full performance?
It's how the EPA certification was done. mistakes were made and everything has to default to those settings. You can get AWD in all purpose by turning stability control down but it won't stick. Otherwise you need any mode change except all purpose. If you want AWD permanently, you'll need to rewire the trailer connector to force tow mode.

You'll have to pick from having an AWD SUV that you have to drive yourself or driver assistance features with a fwd Chrysler mini van.
 

clostridium

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It's how the EPA certification was done. mistakes were made and everything has to default to those settings. You can get AWD in all purpose by turning stability control down but it won't stick. Otherwise you need any mode change except all purpose. If you want AWD permanently, you'll need to rewire the trailer connector to force tow mode.

You'll have to pick from having an AWD SUV that you have to drive yourself or driver assistance features with a fwd Chrysler mini van.
Yeah I’ve heard the same explanation on the epa certification. But it is interesting then that vehicles that got the software upgrade to performance have some acceleration improvements even in all purpose mode. Which seems to at least partially debunk Rivians own logic on why you have to activate a special mode to get the performance boost.
 

iamnid

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Any idea what the clunk actually is?
Rivian opted to use permanent magnet motors in the rear because they are more efficient than induction motors. Because of this, they need to be physically disconnected when not in use. Rivian does this through a clutch system. The clunk is the rear motors being re-engaged, albeit in a rough manner. It was much smoother last fall than it is now.

I wish they had gone the Tesla route using induction motors for the non-primary drive motors. They can be de-energized and free-wheel, unlike permanent magnet motors. The process of energizing them is much smoother (and less likely to break etc) than a clutch system.
 

Dark-Fx

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Yeah I’ve heard the same explanation on the epa certification. But it is interesting then that vehicles that got the software upgrade to performance have some acceleration improvements even in all purpose mode. Which seems to at least partially debunk Rivians own logic on why you have to activate a special mode to get the performance boost.
Gen 1 Quads would drop out of off-road modes for the same reason after some change in '23. The first change meant all you needed to do was get out, check where your vehicle is, get back in, start up, and boom, all-purpose standard. At least until the EPA complains, they can get away with whatever they want.

It's all a numbers game. If Rivian wasn't so focused on driving the highest range they possibly could, they wouldn't do this at all. But they are, so here we sit. If it didn't have an effect on real world driving, they wouldn't be forced to do it either.
 

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Spent a lot of time, this past week, driving some very rocky trails. I love the way my R1T makes easy work of these situations, especially how comfortable the ride is given the terrain. It just puts a smile on my face. In my time with the T, Rivian has had, I believe, 3 major suspension updates. Each one made significant ride quality improvements, sometimes magically curing an issue that was about to send me to my SC. Therefore, I am most excited to see what suspension changes this new update will make.

While cruising the back country this week, I had to wait for these bad boys to get off my trail. It seemed to be a standoff 😂 Pic quality is kinda bad as I was taking it through a filthy windshield.

Rivian R1T R1S 2025.22 Update - Release Notes IMG_1016
 

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EVTrukHog

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Driver Assistance with Hitch Accessories

You’ll now be able to keep Driver Assistance features active when you have an electrical accessory (like a bike rack with lights) plugged into the tow hitch. Just head to Drive Modes > Trailers and select “Accessory.” This doesn’t apply to full trailers, so make sure to pick the right setting.
This is great news! Many of us have been asking for this since 2022 launch. I may just leave my bike rack on all the time now! Thank you Rivian!
 

NC-Rivian

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Rivian opted to use permanent magnet motors in the rear because they are more efficient than induction motors. Because of this, they need to be physically disconnected when not in use. Rivian does this through a clutch system. The clunk is the rear motors being re-engaged, albeit in a rough manner. It was much smoother last fall than it is now.

I wish they had gone the Tesla route using induction motors for the non-primary drive motors. They can be de-energized and free-wheel, unlike permanent magnet motors. The process of energizing them is much smoother (and less likely to break etc) than a clutch system.
Another thing Rivian can do software-wise is to add a “Conserve” mode driven by the front motor only and change the current ”All-Purpose” to include both motors 100% of the time. Good-bye clunk.
 

mkhuffman

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Another thing Rivian can do software-wise is to add a “Conserve” mode driven by the front motor only and change the current ”All-Purpose” to include both motors 100% of the time. Good-bye clunk.
I don't think they can change the behavior of the dual motor and maintain the EPA range rating. In my Tri, it does exactly what you are asking for. But the EPA range is sufficiently reduced.
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