85 RV on a Chevy 1 ton dually chassis. 350 engine, 400 turbo trans. I rebuilt the trans 2 years ago with a master kit. All new clutches, steels & bushings. Forward works fine. In reverse when backing up a hill (under load) it shakes. I don't use it much. Didn't notice it at first, might have not tried backing up a hill. Fluid is full and clean. Any ideas? Reverse accumulator? I put this in the wrong place. Someone delete it please. Thanks
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