4H Driving on dry pavement

unesimpson1 said:

I am looking for experienced opinions on whether or not I could have damaged my truck (‘22 Exp eLSD). I was returning from a camping trip, selected drive mode Tow/Haul, and noticed the drive system was in 4H. I dumbly assumed the drive mode Tow/Haul selected 4H automatically, and drove on — for about 150 miles until a pit stop. When navigating out of the gas station and back to the interstate, at 10 mph or so, I noticed the strange noise and grabbing. Then I realized I should be in 2H, or 4A and never have locked front/rear on dry pavement. Question: The car runs fine, no problem with the drive system, that I can tell, but, could I have damaged the transfer case or other components? I am considering changing the fluid in the transfer case, just as a way to make amends . Seriously, could the fluid have been overheated, or could there be gear filings, etc. due to over-working the system — and new fluid would help avoid problems. Is there any way to detect damage, other than discovering it at 30,000 miles and in the middle of nowhere on a trip?

On another note, when considering this, and eating my fast-food (only at red lights) I noticed my box of chicken nuggets sitting on the console had selected 4H inadvertently. If driving on dry pavement in 4H is so bad, how can it be so easy to put it in that mode, around town?

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Going_Going_Gone said:

Just curious, I have a 2019 Limited with HD tow and eld and I don't even have a 4H button, just 2H, 4A, and 4L and locking rear end...What trim level and/or package do you have?

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Going_Going_Gone said:

Just curious, I have a 2019 Limited with HD tow and eld and I don't even have a 4H button, just 2H, 4A, and 4L and locking rear end...What trim level and/or package do you have?

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Rob6805 said:

Same with my 21. To get 4H you need to put the drive mode in Snow or Sand (something like that) and that will give you 4H. Glad they put a button for it in 22+.

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unesimpson1 said:

That makes sense because I read that for my '22, "Tow/Haul allows 'all driving modes'" (similar to snow and sand)...which would include 4H, it's just that you shouldn't do it on dry pavement. Although I will check to see if my 4H button works in "Normal" or "Eco".

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unesimpson1 said:

I am looking for experienced opinions on whether or not I could have damaged my truck (‘22 Exp eLSD). I was returning from a camping trip, selected drive mode Tow/Haul, and noticed the drive system was in 4H. I dumbly assumed the drive mode Tow/Haul selected 4H automatically, and drove on — for about 150 miles until a pit stop. When navigating out of the gas station and back to the interstate, at 10 mph or so, I noticed the strange noise and grabbing. Then I realized I should be in 2H, or 4A and never have locked front/rear on dry pavement. Question: The car runs fine, no problem with the drive system, that I can tell, but, could I have damaged the transfer case or other components? I am considering changing the fluid in the transfer case, just as a way to make amends . Seriously, could the fluid have been overheated, or could there be gear filings, etc. due to over-working the system — and new fluid would help avoid problems. Is there any way to detect damage, other than discovering it at 30,000 miles and in the middle of nowhere on a trip?

On another note, when considering this, and eating my fast-food (only at red lights) I noticed my box of chicken nuggets sitting on the console had selected 4H inadvertently. If driving on dry pavement in 4H is so bad, how can it be so easy to put it in that mode, around town?

Click to expand...