Got a 96 Sidekick Sport with manually locking hubs. Right front hub wont lock so I can't get 4WD. Anyone know anything about these. Happened last year and I was able to jack up the wheel and spin it while locking it and it then locked. Not this time. Feels as if the knob is not connecting to anything. It moves with very little pressure compared to the left front hub.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Most lock-out hubs have a simple dog clutch engaged by a spring when the knob is turned. The grease inside has likely got thick and the spring hasn't the power to engage the dog clutch. They're not difficult to partially disassemble to clean and re-grease.

Thanks. Took it apart today and cleaned it up. Now it seems to be working.

__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13