Ford 5R110W Transmission 4140 HTSR Steel Billet 4 Pinion Planetary Housing 28 Tooth Pinion for (Early 94 Tooth Ring Gear Only) This is the 5R110 planetary housing for the (Early 94 Tooth ring gear) If you need the (Late 99 tooth) count please see our other listing. 5R110 4-Pinion OD Planetary Housing Made from 4140 HTSR billet steel for high horsepower and EXTREME use No more exploding planets or spline failure 4 pinion planet for early 5R110 applications with 94 tooth overdrive ring gear Includes assembly pin to make needle bearing installation easy Pinion staking pins supplied, no welding required to retain pinion pin