Longfield FJ80 30-Spline Inner Axle Shafts The 4340 Chromoly Inner Axles receive a special through hardening and are heat treated. They have a fully machined and polished seal surface and all 30 spline shafts come with c-clips already installed. These shafts are great for replacements or spares. Fully machined and polished seal surface. 1990-1993 models with short drive flanges will need to obtain the taller drive flanges, Toyota Part Number 43421-60040, to be able to reuse the OEM grease caps.