Max Speed In 4 wheel drive

What is the recommended max speed while in full time 4 wheel drive and in part time 4 wheel drive?

Thanks in advance.

If you are on a slick surface, I don't think it matters how fast you run. Of course if you are on a dry surface, you shouldn't be in four wheel drive anyway.

I was running the interstate during a snow storm when there was also ice on the roadway and I ran in four wheel drive as fast as I thought was safe and manuverable (55-60).

-slacker