Correcting speedo on a 93 4l60/700r4

Is the only way to correct it through buying a new speedo gear? I didn't think you could tune hte computer since the trans isn't electronically controlled...

The '93 700 (4L60) needs to have the speedo gears changed to correct the speedo. If you give me gear ratio, and rear tire size, I can tell you what gears you need.

Frank
CPT

I have 3.73's, 255/50/16's in the back, 245/50/16's in the front...