Complete 1959 1960 Cadillac reverse housing with good piston and internal gear matched . These parts are NOT available new or aftermarket any more. The housing part number is 8618748. Piston # is 8629239 , Reverse Gear number is 8618737. I recommend replacing the lip seals on the piston and these parts will offer many years of service. I have lots of Jetaway Hydramatic hard parts just contact me
https://www.ebay.com/itm/266789011863