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Can You Lock Rear Differential in 4High?

Eric Kern

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Alls I want for Christmas is my Launch Edition to lock in 4hi.......FCA...make It so...
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I tried this at the dealer today. I was able to activate the rear locker in 4-Hi, in a 2021 Mojave, manufactured Sep 2020.

The procedure is shift transfer case to 4-Hi, press Off Road+ button, hold ESC Off button for 5 sec (it seems pressing it once disables traction control, holding it for 5 sec disables stability control), press Axle Locker Rear Only switch. The locker then shows as locked in the Off-Road Pages.

If you forget to hold the ESC Off button for 5 sec, you get a message in the cluster that you must be in 4-Lo to activate the locker.

Thanks to Jim at Normandin CDJR who really knows his 4WD systems.
I have a 2021 Rubicon. This works. Just tried it. The key is holding the ESC button until ESC OFF displays on the screen. Then hit the rear locker and it locks.

Thanks for the info.
 

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Clv22p

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I tried this at the dealer today. I was able to activate the rear locker in 4-Hi, in a 2021 Mojave, manufactured Sep 2020.

The procedure is shift transfer case to 4-Hi, press Off Road+ button, hold ESC Off button for 5 sec (it seems pressing it once disables traction control, holding it for 5 sec disables stability control), press Axle Locker Rear Only switch. The locker then shows as locked in the Off-Road Pages.

If you forget to hold the ESC Off button for 5 sec, you get a message in the cluster that you must be in 4-Lo to activate the locker.

Thanks to Jim at Normandin CDJR who really knows his 4WD systems.
Anyone else confirm if this works? I can't get it. Build date is 10/20

Is it locked out until a certain mileage potentially? I only have 120 miles currently.
 

unixxx

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The Jeep I tried it on likely had less than 20 miles on it.
 

Clv22p

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Tried it today and it worked. I was trying it sitting still instead of while rolling. :facepalm:
 

guntrust

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They originally touted the “Off Road +” button as allowing the rear locker to stay engaged in 4Hi on the Rubicons (among other features) but that is certainly not the case at the moment.
Then we should get the software upgrade.
 

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atxatxatx

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I have 20 Mojave. With a tazer mini you can lock the rear axle in 4 wheel hi.
Is the hardware the same on the 20 vs 21 ? I'm just curious, if that's the case then we (2020 Mojave owners) just have a software difference ?

Curious on how it feels when locked in high.
Thanks.
 

Eric Kern

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So on my LE I don’t have an ESC button, just a button with a skidding car (traction control), just pressing It turns on and off TC, holding for 5 seconds disables, essentially, my advanced safety group (FCW etc..)...anyways, the step by step above does not work for my LE...very sad day:crying:
 

atxatxatx

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Is the hardware the same on the 20 vs 21 ? I'm just curious, if that's the case then we (2020 Mojave owners) just have a software difference ?

Curious on how it feels when locked in high.
Thanks.
I'd like to bump this question to see if people have knowledge on this if there is any hardware difference.
Wonder if Jscan has an option to enable the feature to lock the rear axle in 4 wheel hi ?
 

Eric Kern

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I'd like to bump this question to see if people have knowledge on this if there is any hardware difference.
Wonder if Jscan has an option to enable the feature to lock the rear axle in 4 wheel hi ?
Tazer’s do
 

Bbannongmu

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