46580AK - 5R55S 5R55W, OVERDRIVE PLANET PLANETARY SET, 38T SUN GEAR, FORD. 46580AK - 5R55S 5R55W, OVERDRIVE PLANET PLANETARY SET, 38T SUN GEAR, FORD. GOOD USED COMMON BRANDS FOR THIS PART INCLUDE: FORD, LINCOLN & MERCURY. BE SURE TO CHECK FITMENT PRIOR TO PURCHASING.