Part Notes: Manual Transfer Case; F250, F350, F450, F550; 6r100 Transmission; 142", 176" Wheelbase; From 2/2/2018;Manual Transfer Case; F250, F350, F450, F550; 6r100 Transmission; 148" Wheelbase;Manual Transfer Case; F250, F350, F450, F550; 6r100 Transmission; 160", 164" Wheelbase