Locking Diff stuck after 24.14.3 update

[CarMan ElecTruck]

It should just ‘work’… no excuse for this…

I wonder if Motor Trend had the same problem..

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[Zaimor]

The damage that can be done using lockers on pavement, especially while turning can be very severe and expensive. Don't do it. If you want to test your lockers find a dirt or gravel road or a dirt parking area to try it out.

Not an off-road guy, and only had a couple trucks in the past with locking diffs (rarely used). -Why- is locking diffs + solid ground a bad thing?

 

[JBee]

It should just ‘work’… no excuse for this…

I wonder if Motor Trend had the same problem..

It does work. The problem apparently is to get it to stop working.

 

[JBee]

Not an off-road guy, and only had a couple trucks in the past with locking diffs (rarely used). -Why- is locking diffs + solid ground a bad thing?

The reason for a differential is so that the wheels on the inside of a corner can turn slower whilst the wheels on the outside can turn faster.

If you lock both the inside and outside wheels together it can’t do this, and all the force from the difference in wheel velocity between the sides, will try to snap your half shafts an CV joints instead.

On loose ground this just results in one side loosing traction, but on a high traction surface, things bend instead.

 

[Zaimor]

The reason for a differential is so that the wheels on the inside of a corner can turn slower whilst the wheels on the outside can turn faster.

If you lock both the inside and outside wheels together it can’t do this, and all the force from the difference in wheel velocity between the sides, will try to snap your half shafts an CV joints instead.

On loose ground this just results in one side loosing traction, but on a high traction surface, things bend instead.

Makes sense - thanks! I've always focused on using the feature to lock the wheels to get unstuck, I never thought of what happens after getting unstuck lol.

 

[JBee]

Makes sense - thanks! I've always focused on using the feature to lock the wheels to get unstuck, I never thought of what happens after getting unstuck lol.

Yep pretty much the opposite of what works when one is stuck, is what is required on a high traction surface.

Technically even permanent 4WD vehicles are really just 1WD onroad.

 

[Gene]

It should just ‘work’… no excuse for this…

I wonder if Motor Trend had the same problem..

"It should just ‘work’… no excuse for this…" Grow up, learn about lockers, Tesla explains clearly for use only on loose surfaces. They do work, "no excuse" for your ignorance on the subject.

I doubt anyone will have the problem of not unlocking, as long as they do it on slippery surface, meaning not on pavement. Just as when I watered down my driveway, they unlocked easily.

I was surprised that Tesla allowed lockers on the truck at all. I am super happy about it because of their superiority over electronic traction control. Nothing works better than lockers in difficult and rocky ascents, but you have to use them correctly. I AM SO PLEASED AND FEEL FORTUNATE THAT TESLA GAVE US REAL LOCKERS, LIKE A DREAM COME TRUE. Outside of a few extreme legacy vehicles such as the Jeep Rubicon, you will not find actual lockers on legacy trucks. You might find limited slip diffs, but not lockers. Why? Because they break shit when not used properly, and because they are dangerous if not used properly. If you add up all the trucks in the USA with lockers currently on them, 90% of them will have been installed aftermarket, and then usually only on the rear. . Manufacturers are afraid of the nightmare of uninformed users. Even Rivian is afraid to install them, thanks to people with the "It should just ‘work’… no excuse for this…" attitude.

I applaud Tesla for installing these and trusting us to learn about them and use them safely.

For those that are not familiar, be sure to never use at speed and especially, to save your life, never use lockers on icy pavement. The whole reason vehicles, all vehicles, use open diffs is because the open diff sends the torque to the wheel with less traction. Why? Because, let's say you are driving down a windy, icy, slippery, curvy, mountain road. On each axle, one of the 2 tires has better traction than the other. This one tire with the better traction is what is keeping you from sliding right off the cliff to your death. Better that the motor torque goes to the tire with less traction, otherwise, had the motor sent the torque to the one tire preventing you from sliding off the cliff, the torque if moderately applied, would break that one tire loose and off the edge you go to maybe even your death.

 

[MyFirstElectricTesla]

I know nothing about Off-road. Before the update I always parked in Off-road mode Extract. Drive away bouncing up to 10 M/hr and it auto switch to Very High and then High when it hits 25 M/hr.

Yesterday after the update it doesn't go to Off-road High automatically and stays at below 25 M/hr, I gotta to touch High to get back to normal driving speed.

 

[Tony stank]

"It should just ‘work’… no excuse for this…" Grow up, learn about lockers, Tesla explains clearly for use only on loose surfaces. They do work, "no excuse" for your ignorance on the subject.

I doubt anyone will have the problem of not unlocking, as long as they do it on slippery surface, meaning not on pavement. Just as when I watered down my driveway, they unlocked easily.

I was surprised that Tesla allowed lockers on the truck at all. I am super happy about it because of their superiority over electronic traction control. Nothing works better than lockers in difficult and rocky ascents, but you have to use them correctly. I AM SO PLEASED AND FEEL FORTUNATE THAT TESLA GAVE US REAL LOCKERS, LIKE A DREAM COME TRUE. Outside of a few extreme legacy vehicles such as the Jeep Rubicon, you will not find actual lockers on legacy trucks. You might find limited slip diffs, but not lockers. Why? Because they break shit when not used properly, and because they are dangerous if not used properly. If you add up all the trucks in the USA with lockers currently on them, 90% of them will have been installed aftermarket, and then usually only on the rear. . Manufacturers are afraid of the nightmare of uninformed users. Even Rivian is afraid to install them, thanks to people with the "It should just ‘work’… no excuse for this…" attitude.

I applaud Tesla for installing these and trusting us to learn about them and use them safely.

For those that are not familiar, be sure to never use at speed and especially, to save your life, never use lockers on icy pavement. The whole reason vehicles, all vehicles, use open diffs is because the open diff sends the torque to the wheel with less traction. Why? Because, let's say you are driving down a windy, icy, slippery, curvy, mountain road. On each axle, one of the 2 tires has better traction than the other. This one tire with the better traction is what is keeping you from sliding right off the cliff to your death. Better that the motor torque goes to the tire with less traction, otherwise, had the motor sent the torque to the one tire preventing you from sliding off the cliff, the torque if moderately applied, would break that one tire loose and off the edge you go to maybe even your death.

Just so ur aware, the diff were not calibrated. That is y they would not disengage. It would have been nice if they didn’t engage in the 1st place, instead of getting stuck engaged.
Pic of the errors.

 

[Speedr]

Just so ur aware, the diff were not calibrated. That is y they would not disengage. It would have been nice if they didn’t engage in the 1st place, instead of getting stuck engaged.
Pic of the errors.

@Tony stank , what do you do for this? Do you need to take it into service to get calibrated?

 

[MorseCode]

I didn't have any problems engaging. They did stay engaged longer than I thought they would but I was on sand and not asphalt. A few minutes of going back and forth and they disengaged for me. Having spent a long time off-roading in a variety of vehicles and having many vehicles stuck in 4 low I figured there was a process for disengaging the lockers and that seems to have been correct. I am not sure exactly what it was but I spent some time switching between park, forward, and reverse several times and they eventually disengaged. Don't engage them on any solid surfaces as a test, make sure you are on dirt, sand, or gravel.

 

[Tony stank]

@Tony stank , what do you do for this? Do you need to take it into service to get calibrated?

yea it’s dropped off over at service. They will take a look today and let me know.

 

[eousphoros]

@Tony stank , what do you do for this? Do you need to take it into service to get calibrated?

It will calibrate on its own over time. Mine cleared up on its own after about 3000 miles

 

[Mini2nut]

As more of a lifestyle vehicle I wonder how many owners will actually engage this cool off-road feature.

 

[maxcan]

I'm getting this issue too but I wonder if its just the sensor and the diffs aren't actually engaged. It goes on and off intermittently and I haven't seen any evidence of the lockers actually being engaged despite driving exclusively on hard surfaces since I picked up the CT on Tuesday. No skid marks, no sound of tires skidding on sharp turns etc.

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