J shift transfercase will not go into gear

[Monca68]

Ive got a J shift transfer case and the rear yoke spins freely the front engages only in 4L what could be causing this I have this attached to a freshly rebuilt C4.What is involve in taking a J shift off of a 3speed manual and putting it on the C4?

 

[BIGED]

has youre shifter jumped out of the rails

 

[Monca68]

no and I dont know when it worked last it came out from a 74 I pulled out of a field that had probably sat there about 10 years

 

[travis77]

Roll the truck slowly while pushing the shifter into 2hi.

 

[Viperwolf1]

The transfer case input gear was installed backwards on the input (spud) shaft.