4x4 shift on fly
Whenever I am stopped and in park, if I shift to 4 wheel drive before I start driving I notice nothing different in the steering or anything. Now, a few days ago I was at a light obv. in the "drive" gear but I was stopped and I put it in 4 wheel drive, so when I got the green light I did a U-turn and I noticed it was harder to turn and there was a little tension in the wheels where I had to give it a big more gas to get the truck going, the same thing also happend about a year ago when I tried shifitng to 4 wheel for the first time on the fly, I was probably going about 20mph and when I shifted, something wasn't right, I had to give it more gas to get the truck to move and it seemed like the wheels were trying to hold me up and resisted moving just like I expirienced the other day. But like I said before, when I am in "park" and not moving, if I put it in 4-wheel I have no problems at all...does or has anyone ever expirienced problems when shifting on the fly to 4-wheel like I do. Ever since last year when I shifted on the fly I have not shifted while in motion. If anyone knows what the problem may be, any info is appreciated.