4HI problems?

[diy'er]

02 Envoy SLT, 35K, had it for 4 months. Never had 4WD before. First snow of the season last nite, so I switched to 4HI for a drive to the store. All seemed fine until parking at the store, wet pavement. Very jerky during sharp slow turns. When backing out of the space, it felt/sounded as if I had the parking brake on. Straight ahead driving had no problem. I read the manual, said to use 4HI on snow, A4WD on "variable"...

There have been no problems in 2HI since we bought it. Anyone have advice on this?

[Jeep&Canyon]

When you're in 4-Hi, you lock all 4 wheels and they rotate at exactly the same speed. During typical driving (2WD) the wheels rotate at slightly different speeds when you corner & make turns. So, when you choose 4-Hi, you should be 'bulldozing' or 'blowing thru'.

Avoid turning in 4-Hi if you can because the engine will grunt at you, mainly because your vehicle does not have total control.

[diy'er]

Thanks for the info. I did not realize that 4HI functioned without "differential" action for turning. I will avoid using it in town.