Can you tell me the difference between these 2 vs 4X4 modes?

Tiny
BHAMDOC1973
  • MEMBER
  • 2011 RAM 1500
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
A simple explanation please?
Friday, November 18th, 2022 AT 12:20 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,864 POSTS
In 4-wheel lock, the front and rear driveshafts are locked together all the time. Avoid that when driving on dry pavement as it puts a lot of stress on the transfer case.

4-wheel auto leaves the two driveshafts unlocked until their speeds differ due to a spinning tire, then they lock up momentarily. You are unlikely to feel the engagement, but it makes going through deep snow a lot of fun.
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Friday, November 18th, 2022 AT 3:45 PM

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