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Shifting Selec-Terrain..."Auto", "Snow", "Sport", "Sand/Mud"

14K views 10 replies 5 participants last post by  fdegree 
#1 ·
Shifting Selec-Terrain..."Auto", "Snow", "Sport", "Sand/Mud"

I've scanned through the owners manual, and various threads on this forum. I suspect this has been discussed before, but I couldn't find it...
Does the KL have to be stopped...in neutral...in park...or what, in order to change the Selec-Terrain position, or can the KL be traveling at any speed when the selection is changed?

If it matters, I have AD-1 on my Limited.
 
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#2 ·
any speed..
 
#4 ·
Thanks for the replies. This brings up 2 more questions:
1. Is there a speed limit that should not be exceeded when changing modes? I realize I should not be going 80 MPH when transitioning from pavement to sand or snow. I'm just wondering if there is a speed that should not be exceeded, because it may cause damage when changing the Selec-Terrain mode.
2. Has Jeep published this information anywhere? Perhaps I overlooked it, but I could not find this information in the owners manual.
 
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#5 ·
well you would only use snow mode if its snowing so you wouldnt be going fast any way..sport mode i have have switched at 60 mph with no issue.. and sand mud you should only use when off road ...you are not going to be driving at 80 mph off road. so i think you answered your own question..
 
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#7 ·
well you would only use snow mode if its snowing so you wouldnt be going fast any way..sport mode i have have switched at 60 mph with no issue.. and sand mud you should only use when off road ...you are not going to be driving at 80 mph off road. so i think you answered your own question..
I knew someone was going to nit-pick that question. Which is why I originally stated...
"I realize I should not be going 80 MPH when transitioning from pavement to sand or snow."
No, I didn't answer my own questions, and neither did you...my question is (worded a little differently):
Is there a maximum speed that should be avoided when changing modes in order to avoid damaging any of the mechanical components?

Although, the statement I bolded in your quote above was quite helpful, and does give some perspective...thank you!


It's all electronic, so the computer will ultimately decide whether or not it's safe to shift.

@jeepfan4x4 - Thank you for this answer. I was wondering if there was some kind of built-in fail-safe.
 
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#8 ·
yes common sense speed sorry couldnt resist..just playin...lol..
 
#10 ·
Switching from auto to any other in AD1 is simply and engagement of the dog clutch in the PTU. To effect this when you change the mode, if it is currently in 2wd it will engage slowly the rear diff clutches to spin up the tail shaft. Once the tail shaft speed matches the PTU speed it engages the dog clutch. All automatic regardless of speed.

That said as it is a dog clutch it may not when stationary.

Sent from my SM-G900I using Tapatalk
 
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