Too bad that isn't necessarilly true.Although it has nothing to do with the original post we can all agree, don't drive around on pavement in 4 Hi & certainly not in 4 Lo. I think we have cleared that up. Anybody dumb enough to try it will change there mind after turning out of the driveway.
My moms 2000 s10 blazer had something like that. Normally was 2hi. But push buttons for 4hi, 4low and auto-4wd. Auto-4wd can only be described as awd, like a subaru or something. It was great for snow or even real heavy rains. Really wish the 355's had that option.You never think you need Low, until you need Low!
I'd study the H3 Alpha's set up. The I-5 H3 I had was AWD, but had selectable Hi & Low ranges. I also had a '03 Sierra 1500HD Quadsteer 4x4, it had 2 Hi, 4 Hi, 4 Low, & an "on call" AWD mode that runs off traction sensors. I wish GM would add options for upgraded T-Cases in the 355s. Either that, or go back to a floor-shifter.
Good thing he said he was going to drive in 2-HI:shrug:Do NOT do that.
Driving in anything other than 2WD on pavement with the stock transfer case will result in unnecessary wear and tear on the unit, and probably cause it to fail much sooner than it normally would. It is NOT designed for use on the road or in conditions where traction isn't an issue (such as on dry pavement).
If you want to drive around in 4wd on pavement, you need to replace the stock transfer case with a full-time unit.