I just purchased the truck and have put it in 4L twice and both times when going downhill and turning the truck shakes and acts like it wants to kneel. Yikes! What the heck is causing that? I'm in the process of replacing all the rear driveshaft parts I hope I don't have to do the whole front end as well.

 

All 4 wheels are trying to turn at the same time when you are turning. If you are on solid ground like pavement, that can cause binding and possible damage if enough stress is endured. 4wd needs to be used on surfaces that will allow some tire slippage like gravel or snow which allows the inner most tires to slip and not bind.

 

I try not to use 4wd unless I really need it, or if I am only going straight specifically, like pulling a heavy boat out of a lake I may use 4lo, but that is the only reason, and I wouldnt turn it with 4lo on, I would take it out of 4wd once I was off the ramp, sometimes the ramps at some places can get pretty hard to pull the boats out of though.

 

OH.... well thats a relief! I was on a real steep driveway and my rear wheels spun so I put it in 4L maybe I would be better with 4H? In that situation the Hemi and old tires don't help with traction.

 

Like mentioned, that's a 4x4 no no. You can seriously screw the truck up using 4wd on non-slick surfaces.

 

see you tube pull offs if you are still a doubter on this subject.

 

Your back tire spun because you have an open diff prob. That or you have the stock LSD?
Only time you would ever need 4-lo is going down a super steep hill that is ice-covered. This keeps pressure on the engine and therefore you need not to brake which could otherwise cause you to slide. using the ngine for that stuff is key.
Also, 4-lo if you were stuck in some real thick mud where you dont want to overspin your tires as you would in 4-hi.

For the most part with everyday street drivers. You should NEVER need 4-lo, only 4-hi. 4-lo is just geared lower and you do not want to use it at any speeds over 20mph.

You can use 4xd(4-hi) on pavement IF you are not turning barely at all AND you are not driving more than a mile.

 

You'll pull a boat up the ramp in 4hi with no problems at all. Like DD said, 4lo is for extreme situations only. I haven't used it once in the 3 years I've owned my truck and only once on my previous truck.

 

yep, a quick flip into 4 hi woulda done the trick. Ive had to use 4 lo when ascending/descending extremely steep trails, but thats hardly ever.

 

Ive pulled boats around that you guys would never put behind your trucks. My dad used to be the northwest boat rep for tracker marine, and for donzi, and for donzi proline. I never pulled them out around the road, but pulling some of those bad boys out of the lake is a little harder than your guys 3000lb fishing boat.