My lx570 is stuck in 4Lo mode and I can’tre engage 4Hi. I have tried all the recommended remedies of selecting nuetral while trying to engage, forward, back etc while engaging switch etc but no joy. Anybody had similar problems or other remedies?

 

I don't have the issue, but discussions on why it happens normally discuss never or rarely using low range, as well as the issue of the transfer case shift motor needs replacement.

 

I run trough all the gears and modes on my LX once a month, it needs to be exercised and used.