Bridges don’t/can’t freeze at 37 degrees F. But they do freeze before road surfaces.
https://www.accuweather.com/en/weather-glossary/why-do-bridges-freeze-before-r-1/3544016
I don’t see where they single out AWD and I guess the manual is kinda, sorta, vague when it says,
" ● Do not mix tires of different makes, models or tread patterns. Also, do not mix tires of remarkably different treadwear."
I’d say that if you kinda, sorta, have to use the spare then you should kinda, sorta, not drive with it on any farther than is sorta, kinda, necessary, if you sorta, kinda, know what I think I mean.
CSA
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C’mon Mike! That’s common sense, just like my name.
What I was questioning was bridges freezing at 37* F. 
CSA
Laying it on a bit thick, are we . . . ?! 
I drove mainly for mostly unionized class 1 common carriers. I had been in trucking since 1955. The companies I drove for did not start buying power steering for the road tractors until the 1990s. In 1972 I was driving for a company that notoriously overloaded their trailers. We got a batch of new Kenworths in with Hendrickson rear suspensions like the big off road dump trucks, with 20 leaf springs. They rode so hard the we lost the front half of 2 loads of jelly with the jars breaking inside the cardboard cases. The steering was even worse, to get around a 90 degree corner I had to half stand up in the cab to get enough leverage to turn the huge steering wheel. I was 6’ 3: and weighed 260. In the winter we used to let them bounce off the snowbanks to get around the turns. We all loved the motors though. They had the just introduced 350hp Cummuins engines and we could pass any other trucks on the road. They were the only trucks I ever drove where YOU decided how fast to drive rather than the truck. The company I retired from in 1995 had road trucks that were 20 mph slower than those 72 KWs.
RE: Manual Steering. Many guys I knew in the sixties with “muscle cars” shunned power steering because manual steering provided “ better road feel”. When it came to Vettes, it would no longer be a sports car with PS or an automatic transmission.
A friend had a 1967 Ford 7 Liter convertible, sans PS, it was a bear to steer at very low speeds, and the heavy clutch gave your left leg a workout.
Now for what I miss: the ejection seat and missile launchers on my DB5.
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One year only, exclusive, “Style”… The other thing I miss is character.
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Weird. I have 6 cars. Only one , a '69 Chevelle has a foot switch on it. All the others including a '37 Chevy and '80 El Camino have column switches . I have a badly damaged left hand and can still reach the switch(s) without taking my hand(s) off the wheel. Hook your thumb on the rim and reach with your fingers.
My main objection is that the 37F freeze warning cannot be disabled or adjusted. I’d adjust it down to 32 or 33 and turn off the audio beep, if I could. In my opinion, a beep and flash should be an urgent message, not because it’s 37F. It’s below 37 most fall/winter/spring mornings.
Cars can have TPMS without sensors and some new cars use that system. Allows easier switching to winter tires/wheels and there is no battery to wear out.
That is not a NASA grade instrument so there is a plus or minus involved . I just don’t see why this bothers you so much .
How on earth does a TPMS system work without sensors? Does it work like a guy with a tire pressure gauge in his hand, squatting down and checking tire pressure?
It does use sensors, but not in the wheels. It uses the ABS sensors to compare tire speed. If it detects a difference, it assumes that’s because a tire is low, and lights the warning light.
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You being serious . . . or just being a smart alec?
I suspect the latter
I’m sure you’ve heard of indirect tpms . . . many cars have that system
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I was being a smartass… as I tend to do
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Have you been in a car that has this “feature”? It will beep and flash every cold morning (in Toyotas). You cannot turn it off.
I don’t like distracting warnings, especially if it’s going to warn about possible freezing at 37F. Warn without the beep? Fine whatever. Warn with beep? Terrible.
The worse part is that some buyers may not find out about this until months later.
Switch for what?
Got your PM, you can post responses here, you were talking about a foot operated dimmer bright switch for headlights. Had a foot switch in my 68 Cougar for windshield wash, along with dimmer bright I think.
I frequently scan (glance at) my dash while driving and don’t really need an audio warning. Unfortunately many drivers can drive with a bright red oil pressure warning light until the engine seizes!
@sgtrock Yes, that reminds me of a women in a driver’s class my wife took. Each participant had to state why they took the course. One well to do woman said she let her son drive her Olds and he came back in the house saying “Mom, the oil light is on”. She said, “don’t worry about it, it’s been on all week”. Her husband then made her take the course.
My wife took it because she wanted to learn more about cars and their common problems and how to cope in an emergency. In those politically incorrect days they called this course “Powder Puff Mechanics” and it was giver by the YWCA.
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That remind’s me of back in my younger day’s when I worked as a pump jocky in the full service day’s a older lady came in one day for a fill up I started the pump opened the hood checked the oil looked around & didn’t see any thing else that needed attention I asked her to start her car so I could check the trans fluid she said she did not know she had a transmission.