Does anyone know if driving on the highway in 4x4 high is a problem for the transfer case? I know 4x4 low shouldn’t be driven faster than 10mph, but not sure if there’s any restrictions for 4x4 high.
I agree use 4 low when you feel the motor is labouring on steep grades etc. on forestry roads. If the tach says its revving high in high gear I will go back to regular 4WD.With the NCV3 you can go way faster than 10 mph in low. It’s not a true low like a true 4x4. When I’m off-road going up and down grades I really never use 4hi as the van has to work way too hard. 4LO in the van, especially with weight on board, is a much better option for dirt road cruising. I use it for traversing forest roads between 20 and ~40 mph.
I would never go above ~10 or so in my Jeep’s 4LO.
As for 4hi in the van, I don’t believe MB places any restrictions on it as we are again not dealing with a real 4WD system. Everything is open.
someone with more specific knowledge and advice will no doubt chime in, but wanted to respond to your 4LO comment.
give it a shot...you might find that your van feels happier...it’s not an actual 4LO so using it on forest roads with steeper grades and rougher terrain is really the optimal use.I cruise at 65 in mine all the time in high range.. I leave it in 4wd all Winter
3 years now and I've never had to use low range and thats with lots of trails and water crossings in the Summer..