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Tightening up "monkey motion" shifter


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I have a F4W71A transmission from my 71 240Z that is sitting on the floor of my garage while I rebuild the engine.  The shifter has that loose "monkey motion" which I'd like to try to tighten up while it's out of the car.

 

I'm thinking that if I can take off the shift lever, I can probably just squeeze it in a vice to take up the play between the prongs.  If that doesn't work, I could try heating it and banging it on an anvil.  Has anyone out there done this successfully?  Removing the C-clip and pin from the bottom of the lever is easy, but how do I get the pin out of the upper pivot (see pic below)?  It looks like a flathead screw, but trying to turn it with a screwdriver got me nowhere.

 

IMG_6050.thumb.jpg.997ec0d13efb59d306972f584c2ebd93.jpg

 

 

Video of loose shifter:

 

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