...sounds like the two set-screws are loose on the Ball-Crank's Shaft; it's in the 'square' shifter box on the ZF. The set screws can be accessed with-out opening the cover by raising the car rear, laying on your back, and removing the two rubber plugs on the bottom of the box! The set-screws take an allen wrench. Take a look and you'll see what I mean. These were loose on a Pantera I sold years ago; that had shifter trouble!...
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