Part Numbers

40052 = Knuckle Arm RH

40053 = Knuckle Arm LH

Knuckle Arm RH

B10: 40052-18000 (different from newer models)
B110: 40052-H1000, 40052-H5000
PB110: 40052-H2501
B120: 40052-H7400 (75-8504), 40052-H7440 (8504-)
B210: 40052-H5000 (74-75 A12), 40052-H7400 (1976-up A engine, except US), 40052-U0101 (US, also PB, also L16)
B310: 40052-W5000 (All US, all A15, most A14), 40052-H7200 (A12, A13, and budget A14 models), 40052-W5060 (big engines, 8001-up)

Front Axle