When I picked up my '02 Discovery II it had the common problem of a seized high/low range selector due to never really having been used. I worked it a bit manually, sprayed the selector linkage with WD-40 from underneath and repeated every couple weeks until I got it freed up.

It now engages low range, but the sensor thinks it's still in neutral, so chimes constantly. It doesn't seem like there's any further forward that the selector knob can be pushed forward. It's better than no low range, but I'd like to get that resolved before winter is in full effect and I need it more frequently (to save my eardrums and what's left of my sanity.)

Any tips or tricks for resolving this? (As it's an '02, I am considering swapping in a transfer case with locking center diff, but that'll be much further down the road.)