On my 99 Dakota shifts into 4wd high & the part time 4d light comes on, but when you shift it to 4wd low it stays in 4wd high & the light stays the same. I crawled underneath & the shift rod is moving the lever on the transfer case. Any Ideas I only use the truck to plow my steep driveway so if I can get it into 4wd low & leave it there that would be ok to. Thanks Sal

Forgive the dumb question, but are you putting the transmission in neutral before trying to shift into 4 low? Most newer vehicles won't shift the transfer case to low range unless it is not in gear.

Outside of that, is the lever making it all the way to low range on the transfer case? The shift rod might require adjustment. Maybe try unhooking the linkage and then forcing it to the 4 low position to make sure the transfer case is okay?

Yes,trans in neutral lever moves from 2wd to 4wd high to neutral to 4wd low no problem.just stays in 4wd high instead of engaging low & I think the light on the dash should say Full time 4wd when in low.

I'm out of ideas, besides chocking the wheels, unhooking the linkage, and trying to shift it by hand at the transfer case. It sounds like it is out of adjustment if it never even makes it to neutral.

I just sold a 98, and I think it lights the same light in 4 high or 4 low. Said part time 4wd like yours I believe. Hard to believe the mechanical linkage isn't switching to low range.

did you drive it and verify it is not in low? or are you judging the light? is this a manual shift transfer case (lever)or electronic switch? The manual shift transfer case has 1 switch for the light .It is a 2 wire switch, it only shows 4x4, doesn't show low or high.

Drove it. No difference between high & low. It is a manual shift transfer case.

Shift fork, pads or collar could be worn, not letting it go into low. Or could be a worn or mis-adjusted linkage.