Should be simple to isolate, there's nothing hidden in the shifting linkage to the transmission.
Need to identify where the slop at the shift lever is coming from first.
Is the lever at the transmission end bouncing around with the shift lever?
If you do find that the joints in the shift linkage is worn out, replace with heim joints with the part listed in the above pic.
Amazon.com: Aurora Bearing Company CW-5S; 5/16"-24 Stud - RH / Rod End Thread - RH: Automotive
As you can see, the stock setup is crap, but easily fixed to be better than new.
Need to identify where the slop at the shift lever is coming from first.
Is the lever at the transmission end bouncing around with the shift lever?

If you do find that the joints in the shift linkage is worn out, replace with heim joints with the part listed in the above pic.
Amazon.com: Aurora Bearing Company CW-5S; 5/16"-24 Stud - RH / Rod End Thread - RH: Automotive
As you can see, the stock setup is crap, but easily fixed to be better than new.
