Cybertruck has no Parking Pawl in its Tranmission. Lightning does.

[StevenC56]

Maybe the point is that Tesla may be cutting corners in places that are not in the owner/driver's best interest.

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[Runaway Tractor]

Maybe the point is that Tesla may be cutting corners in places that are not in the owner/driver's best interest.

Or maybe they're not and you're fabricating a non existent problem?

 

[StevenC56]

Or maybe they're not and you're fabricating a non existent problem?

I said "may". I'm not fabricating anything. It was confirmed that the Tesla has no mechanical parking pawl, correct?

 

[dww]

Found out early on that the auto emergency brake setting only works on an incline, and even then it's not 100%. So I've trained myself to put the shifter in park and apply the park brake while keeping my foot on the brake pedal every time. Then when you start the next time keep your foot on the brake pedal, shift to reverse or drive, then release the park brake.

It works on an incline or if you open the door in Drive. It just doesn’t do it when it makes sense… when you put it in Park.

 

[StevenC56]

It works on an incline or if you open the door in Drive. It just doesn’t do it when it makes sense… when you put it in Park.

Maybe so, but have a total loss of power to the Lightning and you still have a mechanical parking pawl. On the Tesla under the same circumstances, you have a second neutral. I'll take the Lightning's design any day over the CT, even with its quirks.

 

[potato]

Then when you start the next time keep your foot on the brake pedal, shift to reverse or drive, then release the park brake.

Pro tip: you don't have to release the parking brake. The truck will do it for you when you step on the accelerator

 

[Runaway Tractor]

I said "may". I'm not fabricating anything. It was confirmed that the Tesla has no mechanical parking pawl, correct?

And not one person has presented one single piece of evidence that not having it is a problem. You fabricated the notion that not having it is cutting corners. Post some fact supported evidence of an actual problem and we'll talk

 

[StevenC56]

Pro tip: you don't have to release the parking brake. The truck will do it for you when you step on the accelerator

True, but I don't care for the way that feels.

 

[StevenC56]

And not one person has presented one single piece of evidence that not having it is a problem. You fabricated the notion that not having it is cutting corners. Post some fact supported evidence of an actual problem and we'll talk

Again, I didn't fabricate anything unless the CT does in fact have a parking pawl. If it doesn't, in my opinion that's cutting a corner that by design is a basic automotive safety backup. To my knowledge no car or truck with an automatic transmission in the last 50 years has not included a mechanical parking mechanism.

 

[Firn]

Yes, you set the brake AND leave in gear is what I was taught and always do.

With the Lightning, you can put it in park and set the parking brake (or it sets itself automatically in many cases).

With the CT, it only has the parking brake. No transmission "Park" pawl.

Note that the parking brake is clamping on the regular brake rotor using the regular brake pads. It can only clamp with some maximum amount of force and above that, the brake slips. Its probably designed to be something close to the tire traction. But it can fail in all the ways the brakes can fail: rotors can get contaminated, pads can get glazed, pads and rotors can get worn down, etc.

The parking pawl engages a hard interlock on a shaft in the differential. Overcoming it would require shearing off the parking pawl, the tooth on the dog it engages, or the splines on the shafts involved, twisting the axle half shafts apart, etc. With all those parts likely made of hard steel we are probably talking 10,000's of lbs of force before failure. It is also probably designed to handle torques up to the tires skidding with maximum load on them plus some margin. Its completely independent of the regular brakes and its failure modes are differing and redundant.

The brakes can take WAAAAY more force than those drive train components. There are also SIGNIFICANTLY few components where if ANY of them fail the "brake" stops working.

The reason to set the parking brake is because it IS the most direct and strongest system with the least amount of parts that can fail.

The amount of force a normal parking brake can imply is far more than the traction of the tire. I have seen plenty of transmission pawls fail from forces that were way less than parking brakes could provide.

I mean, this IS the reason you are told to use the parking brake, and not just the transmission or parking awl, when on a hill or with a load, it's a stronger more direct system.

 

[Firn]

Again, I didn't fabricate anything unless the CT does in fact have a parking pawl. If it doesn't, in my opinion that's cutting a corner that by design is a basic automotive safety backup. To my knowledge no car or truck with an automatic transmission in the last 50 years has not included a mechanical parking mechanism.

And yet no manual has. You have to manually engage something similar, and even that still allows the vehicle to move and it very frequently slips out of place.

The parking mechanism in an automatic transmission is super weak. It is a convenience feature, not a strength or security one.

 

[StevenC56]

And yet no manual has. You have to manually engage something similar, and even that still allows the vehicle to move and it very frequently slips out of place.

The parking mechanism in an automatic transmission is super weak. It is a convenience feature, not a strength or security one.

It's always recommended to apply the parking brake on either an automatic or manual transmission vehicle, but that's in addition to having the automatic in Park or the manual transmission in gear. You say you've seen a lot of auto trans parking mechanisms fail, so are you a tech? I was a master transmission tech at a Chevrolet dealership from 1977-2000. I saw very few parking pawl failures, and most all were the result of severe abuse.

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