Originally Posted by kdude
Thanks for the advise Moab. Just another questioin regarding 4wd...
In the manual and a you tube vid i watched Jeep says that its not good to run the 4wd unless the road warrants it.. In our winters up here we can have dry roads and suddenly get into slippery slush stuff ... Why does Jeep say you shouldn't drive in 4wd unless on slippery roads.. Why can't I just leave my wheels in 4wd and not have to worry about burning up the tranny? This was not an issue with my CRV..
If you are simply driving in a straight line, it doesn't cause as much of a problem as turning, going around curves, etc. If the wheels are unable to slip (or hop, as some would say), a lot of stress builds up in driveline components since they are bound together in 4WD but your wheels turn at different rates going around curves. I don't think the problem would be with "burning up the tranny". It's more in axles, ujoints, driveshafts, etc. If you've ever heard someone with full-time lockers try to turn a corner on a city street, you get an idea of the problem. One tire screeches intermittently as it completes the turn...releasing the stress that builds up in such a system very fast. I had a friend break an axle once with full-time lockers simply because one wheel was unable to slip on a not-so-slick slickrock trail.
If you are driving on mostly slushy roads and need 4WD, then leave it in 4WD. When you get to the point where the pavement is mostly dry, slip it back into 2WD. I'm not a mechanic, but it seems that periodically shifting into 2WD would release any of that built up stress on driveline components. This is not just a jeep thing...it's the same with any part-time 4WD vehicle I've ever owned.