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