727 46RH conversion coming

MileHighDart said
Hmmmm, so you didn't do any trimming to the USCartool crossmember? Did you get any instructions with yours? I think I see the difference between your setup and mine. I bought my crossmember about a year ago, and I don't believe there were any instructions. I figured the holes on the bottom of the trans for the mount we're on the centerline of the transmission, and that when I welded the mount bracket to the crossmember, that it should be centered on the crossmember. This is why I had to trim off some of their crossmember on the driver's side, cause it would not clear the side of the transmission with the mount centered on the crossmember.
It looks like you welded the mount, offset towards the passenger side thus shifting the crossmember over towards the driver's side so it clears the side of the transmission. But aren't u basically forcing the rear of the transmission towards the passenger side by having that mount not centered in the crossmember?
I hope that all makes sense. Was there anything in the instructions telling you to offset the mount? Or did you not have instructions either?
I have noticed on mine, that once I welded in my strap and did the final install of the trans, the driver's side of my trans is almost touching my reinforcement strap. In fact on long right turns in the road, it will start touching and you can hear it rubbing.
I will be under the car again this week and I was going to loosen both motor mounts, and the trans mount, and see if I can move the rear of the trans a bit towards the pass side.

So my US Cartool crossmember came very straight with no deviations. I remember yours had some issues that you corrected. Fortunately I didn’t have to do that. It didn’t come with directions so I’m relying on what others have done and what adjustments I need to make as they come up at this point.
I did have to do some shaving on the mount At the front drivers side strap to insure clearance. I also shaved a tiny bit more off my transmission case at that spot. I did trim the pad mount too, where the rubber/steel contacted the mount at the top. You can see where the corners are ground at the top to allow no contact here.
The pad mount is definitely offset to the passenger side but the transmission sits centered in tunnel on its own without any persuasion. That’s possibly why they designed the mount with so much room for adjustment I think. I left enough room to shim the pad if needed but I think it will be ok based on the pinion angle I currently have. I also think these cars weren’t all that precise from the assembly line so some differences are likely from car to car.
I ended up leaving the motor mount shims in place for now as the motor position measures right on with these in place. I suspect when the previous owner swapped in the magnum he used the 273 mounts instead of going to 360 mounts so it needed to be shimmed. It’s something I’ll def have to address I think in the near future.