#9R3. Fits C6 1970-1987 / E4OD 1989 on model years. (THIS PART DOESN’T FIT A 4R100). Replace the worn race with Sonnax’s new replacement race. This through hardened race is a direct replacement for the OEM part. The new Sonnax race fits 1989 up model years. It’s designed for use with a bearing, 1.013″. Replace the worn race with this new, through hardened, direct replacement race. Same as #9R2 but comes with a new bearing. Made with upgraded materials.