If you follow the linkage down to where it goes into the tranny there is a little plastic piece over the linkage that pops into a link that is on the tranny. That plastic piece wears out and can make it tough to get into the proper selected gear. Give that a look if you haven't already.
1994 Ford Mustang GT
1990 Ford Bronco II
2001 Lincoln LS V8
1970 Ford Bronco
2006 Harley-Davidson Sportster Custom
If you don't already own a Ford (or Ford owned product), get one.