Ford 9" pinion thread size

[Grnscru]

What is the proper thread pitch on a Ford 9" pinion? I somehow screwed up the first couple threads on mine and need to find a die to rethread it and the search wasn't much help.

[Grnscru]

Nevermind, I found it on another site to be 3/4"-20. It is classified as a spindle thread for anyone who may need it in the future.