Thanks for the response I did try with transfer in N and trans in 1st as required by the manual but when I tried to push the unit by hand not to damage anything it would not move. Everything is locked up. Maybe what you are saying is you need to force the unit which will turn the engine, rear driveshaft, rear axel, front driveshaft and front axel. This would make no need for lockable hubs. Now maybe my unit does not function correctly as designed. If you have the time please call me to help figure this out. Thanks Bill 704 968 1972