My 61 Hawk has the Borg warner T10 4 speed transmission. The speedometer doesn't work, so after checking it out, I ordered a Speedometer pinion gear (bullet) to the proper rear end size (3.07) and the proper speedometer cable from SI. After receiving the parts, I noticed the speedometer drive gear was also warn; however, I can't find it anywhere. The GM people tell me, that part is strictly Studebaker. Can anyone help?