Buy OEM Mercury Part # 3C3Z5776AB (3C3Z-5776-AB). Shackle Assembly. F450 Super Duty. F450, F550; Chassis Cab. F550 Super Duty. REAR SUSPENSION. SUSPENSION COMPONENTS; Rear suspension

164" Wheelbase; 6. 2L; W/O Perf. Shocks; W/O Off Road Shocks. 164" Wheelbase; 6. 2L; W/O Perf. Shocks; W/OFF Road Shocks; 2/20/17-11/20/17. 164" Wheelbase; 6. 2L; W/O Perf. Shocks; W/OFF Road Shocks; To 2/20/17. 164" Wheelbase; 6. 2L; W/PERFORMANCE Shocks. 164" Wheelbase; 6. 7L Diesel; From 2/20/17. 164" Wheelbase; 6. 7L Diesel; To 2/20/17. 164" Wheelbase; 6. 7L Diesel; W/O Perf. Shocks; W/O Off Road Shocks. 164" Wheelbase; 6. 7L Diesel; W/O Perf. Shocks; W/OFF Road Shocks; 2/20/17-11/20/17. 164" Wheelbase; 6. 7L Diesel; W/O Perf. Shocks; W/OFF Road Shocks; From 11/20/17. 164" Wheelbase; 6. 7L Diesel; W/O Perf. Shocks; W/OFF Road Shocks; To 2/20/17. 164" Wheelbase; 6. 7L Diesel; W/PERFORMANCE Shocks. 164" Wheelbase; 7. 3L; W/O Perf. Shocks; W/O Off Road Shocks. 164" Wheelbase; 7. 3L; W/O Perf. Shocks; W/OFF Road Shocks. 164" Wheelbase; 7. 3L; W/PERFORMANCE Shocks. 20" Wheels. F250; 4WD; 142" 148" Wheelbase; 6.2L; w/o Off Road Shocks. F250; 4WD; 142" 148" Wheelbase; 6.2L; w/Off Road Shocks. F250; 4WD; 142" 148" Wheelbase; 6.7L Diesel; w/o Performance Shocks; w/o Off Road Shocks. F250; 4WD; 142" 148" Wheelbase; 6.7L Diesel; w/o Performance Shocks; w/Off Road Shocks. F250; 4WD; 142" 148" Wheelbase; 6.7L Diesel; w/Performance Shocks. F250; 4WD; 142" 148" Wheelbase; 7.3L; w/o Off Road Shocks. F250; 4WD; 142" 148" Wheelbase; 7.3L; w/Off Road Shocks. F250; 4WD; 160" 164" 176" Wheelbase; 6.2L; w/o Off Road Shocks. F250; 4WD; 160" 164" 176" Wheelbase; 6.2L; w/Off Road Shocks. F250; 4WD; 160" 164" 176" Wheelbase; 6.7L Diesel; w/o Off Road Shocks. F250; 4WD; 160" 164" 176" Wheelbase; 6.7L Diesel; w/Off Road Shocks.

F250 SUPER Duty; 4WD. F250 Super Duty; 6.7L; 4WD; Heavy Duty Tow Package; 160" Wheelbase; w/o Performance Shock. F250 Super Duty; 6.7L; 4WD; Heavy Duty Tow Package; 160" Wheelbase; w/Performance Shock. F250 Super Duty; 6.7L; 4WD; Heavy Duty Tow Package; 164" Wheelbase. F250 Super Duty; 6.7L; 4WD; Heavy Duty Tow Package; 176" Wheelbase. F250 Super Duty; 6.7L; 4WD; Premium Shock; 142" Wheelbase. F250 Super Duty; 6.7L; 4WD; Premium Shock; 148" Wheelbase. F250 Super Duty; 6.7L; 4WD; Premium Shock; 160" Wheelbase. F250 Super Duty; 6.7L; 4WD; Premium Shock; 164" Wheelbase. F250 Super Duty; 6.7L; 4WD; Premium Shock; 176" Wheelbase. F250 Super Duty; 6.7L; 4WD; Standard Shock; 142" Wheelbase. F250 Super Duty; 6.7L; 4WD; Standard Shock; 148" Wheelbase. F250 Super Duty; 6.7L; 4WD; Standard Shock; 160" Wheelbase. F250 Super Duty; 6.7L; 4WD; Standard Shock; 164" Wheelbase. F250 Super Duty; 6.7L; 4WD; Standard Shock; 176" Wheelbase. F250 Super Duty; 6.7L; RWD; 142" Wheelbase. F250 Super Duty; 6.7L; RWD; 148" Wheelbase. F250 Super Duty; 6.7L; RWD; 160" Wheelbase. F250 Super Duty; 6.7L; RWD; 164" Wheelbase. F250 Super Duty; 6.7L; RWD; 176" Wheelbase. F250 Super Duty; 6.8L; 4WD; Premium Shock; 142" Wheelbase. F250 Super Duty; 6.8L; 4WD; Premium Shock; 148" Wheelbase. F250 Super Duty; 6.8L; 4WD; Premium Shock; 160" Wheelbase. F250 Super Duty; 6.8L; 4WD; Premium Shock; 164" Wheelbase. F250 Super Duty; 6.8L; 4WD; Premium Shock; 176" Wheelbase. F250 Super Duty; 6.8L; 4WD; Standard Shock; 142" Wheelbase.