When will we be able to switch All Purpose mode to RWD

[Eeyore]

On-screen SMS alerts/integration. I don't need carplay, but it kills me that I miss all of my text messages when I'm driving.
It's also super annoying that my "high tech" $100k electric SUV doesn't have the same basic connectivity that my 17 year old daughter enjoys in Grammy's, old, hand-me-down Hyundai Santa Fe.

My 2009 Honda Civic had better connectivity than my R1T, but it wasn't as quick.

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[bhendron]

Not possible in a Rivian. They use permanent magnet motors, which require being physically disconnected in order to free-wheel, and Rivians only have a disconnect on the rear motors.

oh, thanks for this response. Now I can quit hoping and wishing.

 

[2kwik4u]

First, it takes a certain amount of energy to bring a Rivian to a stop (regardless of whether that be via regen or friction brakes). Using both front and rear motors in equal proportion would not allow you to recapture any more energy (ignoring details regarding the different efficiencies of the front and rear motors).

Just watched this video this morning. As best I can from his data, there's a pretty good difference in the efficiency of the front/rear motor (he thinks it might be from the invertor differences). Interesting timing, as he just posted this.

Second, you really don't want to shift the braking bias toward the rear wheels. Even with friction brakes on ICE vehicles, the work performed by the brakes is biased toward the front wheels. This is because the vehicle's weight transfers to the front under decel which basically help improve the tires grip on the road. Similarly, the rear tires are unloaded which is not beneficial to applying braking force through the rear tires. There are other issues such as vehicle stability when braking that also benefit from a front brake bias.

These are great points.

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