i have a 78 chevy truck with a 203 transfer case i cant get my four wheel to drive to pull i replaced the lock out hubs i thought this would slove the problem but it didnt i can shift my transfer case in low and it engages but i jacked the front end up and the front tires will not lock i disconnected the driveshaft and turned it by hand and it spun freeely in any range so i was wondering if this was a transfer case problem or front end if anyone knows let me know thanks