T31732 John Deere 450 steel steering clutch disc. These steering clutch discs fit the John Deere the 450, 450B, 450C, 450E, 455E, 550, 555B tractors. The John Deere 450 series tractors require 8 of these T31732 steel discs per side. The John Deere 450C and later tractors utilize a wet steering clutch and require a mating bronze disc, part #T44129. The T44129 bronze disc can also be substituted for the T20716 in the 450 & 450B for severe service.