904 transmission issues

I have a built 904 transmission behind a GEN three hemi. The shifter linkage bracket on the transmission is very hard to move. When I unhook the shifter linkage from the bracket, the shifter and cable moves just fine, but when I put it on the bracket it binds and won’t move with a lot of effort. I checked for clearance on the bracket to the case and there is no interference. I even moved the bracket up a little and it did the same thing. I have the adjustment dead on. I’m stumped on what it could be. This is a fresh transmission rebuilt. Any ideas? Thanks Chuck