@HoosierDaddy , If I understand you correctly, your referring to the bracket that mounts to the shifter body at the very rear which bolts UP to the body. If that's in place you will not use the the trans mount. Vice a versa, if you use the trans mounting bracket, you will not use the body mount bracket at the rear which mounts to the body. Using both I imagine would bind up the shifter since the shifter can only mounted one way or the other. (Body vs Trans) I hope that helps.
Our rear bracket that attaches to the car has polyurethane bushings in it allowing for the movement needed. They are firm enough that you are not going to deflect the shifter while shifting but soft enough that the shifter still can go where it needs to with the trans. The bolt that goes through the linkage allows for the left to right movement of the linkage, it acts as a pivot in itself.
Nawwww
I was talking about the piece that had to be unbolted in the video to show how the shifter can rotate around the shaft. It connects the front of the shifter body to the top back of the transmission. That's what I'm asking: does that piece get used for the body mount method. And if so, why doesn't it prevent the shifter rotating around the shaft. I mean the video goes to the trouble of showing how the shifter can rotate around the shaft if the transmission twisted in relation to the shifter when body mounted. I'm guessing the part I'm asking about just isn't used for the body mount. Otherwise, I don't understand how that part would NOT prevent the shifter from rotating around the shaft if needed due to the transmission twisting.
The front Arm that bolts between the 2 ears on the transmission, is bolted in place regardless of what mount you use. Im not really sure what you are asking. The shifter bolting to the trans or body still has no effect on the linkage that is bolted to a whole separate point on the trans and is free to move any where it needs.
He thinks the front arm mount will cause issues with the angular alignment of the shifter. As to his understanding of the underlying mechanics or his explanation of such, I cannot speak to. I believe the answer is in the results. Either it misses shifts or it doesn't. I believe the point is that in real world testing, it offers the best shifting without mounting directly to the trans; essentially.
The way it looks to me, when having it body mounted you gain up and down and front to back freedom, but you are still restrained when rotating about the north-south axis (torquing), as you are when trans mounted.
That was my impression if that piece between the top of the trans and the shifter was used. The system allows a lot of up and down movement linearly or angular but doesn't seem to allow much if any side to side or rotational movement. Maybe the transmission can only move up and down in relation to the body but I always had the impression the transmission could rotate in relation as well. Have no idea about side to side.
That's sounds about right to me.