The fourth character in casting/part number prefix is for the Design Engineering Office that created the part.
A | Light Truck Engineering Division |
B | Body and Electrical Product Division |
C | Chassis |
D | Overseas Product Engineering |
E | Engine |
F | General Parts/Electrical and Electronics Division |
H | Climate Control (1972-up) |
J | Autolite/Ford Parts and Service Division |
L | Industrial Engine Parts and Service |
M | Performance/Special Vehicle Operations (Incl. Holman Moody) |
N | Tractor Parts |
P | Auto transmission |
R | Manual transmission |
S | Light and Heavy Truck Special Order Parts |
T | Heavy Truck Engineering |
U | Special Vehicle Operations |
W | Axle and Driveshaft |
X | Emissions, Economy, Special Vehicle Engineering (Muscle Car Parts) |
Y | Lincoln/Mercury Service Parts |
Z | Ford Service Parts |