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