It's been my opinion that these extra marks are a manufacturer's date code or something similar. Ken Ames Quoting piper_pa20 <piper_pa20@xxxxxxxxxxx>: > Tom, > > I checked my 73 and 74 TSMs and can find no reference to a "YH" code, just > the H. Is the code stamped or cast? > > Joe Fulton > Salinas, CA > ----- Original Message ----- > From: "Tom Jennings" <tomj@xxxxxxx> > To: "AMC List" <mail@xxxxxxxxxxxx> > Sent: Thursday, June 30, 2005 11:26 AM > Subject: axle ID? (7-9/16", aka amc15) > > > > My 73 parts car has an "H" axle code (2.73:1). So it's got the > > right speedo gear (luck!) I need for my 70. Maybe someday > > if I get ambitious I can make a twin-grip out of it. > > > > But there's two stamps on the boss: > > > > H > > > > and beside it, rotated 90 degrees, in slightly smaller letters: > > > > YH > > > > Does this mean anything? Never saw this before. > > > > > > > > > > > > > > > >