Ford F100, F150, F250, & F350 except Super Duty Rear Spring Codes
Spring Code	Year Range	Aftermarket Part #	Superceded to	Comments
1	1997 to 2000	43-1227	43-1233
2	1997 to 2003	43-1229	43-1233
3	1981 to 1982	43-687	43-807	Use 43-721 in pairs, 380lb more capacity per side, 10 Leaf
3	1983 to 1985	43-807		Use 43-721 in pairs, 380lb more capacity per side, 10 Leaf
3	1986	43-889	43-721
3	1997 to 2003	43-1231
3	2004	43-1193	43-1297
4	1997 to 2000	43-1233
5	1981 to 1982	43-721
5	1983 to 1986	43-809	43-721
6	1981 to 1991	43-689
6	1992 to 1993	43-1051	43-689
6	1994	43-1087	43-1225
6	1999 to 2000	43-1433	43-1233
6	1999 to 2003	43-1227	43-1233
6	2004	43-1433	43-1233
7	1981 to 1983	43-691
7	1984 to 1986	43-839
7	1987 to 1990	43-965
7	1991 to 1993	43-1053	43-965
8	1981 to 1986	43-693
9	1981 to 1989	43-695
9	1992 to 1997	43-1055
9	2001 to 2003	43-	43-1353
9	2003 to 2004	43-1353
A	1981	43-689
A	1982	43-699
A	1983 to 1995	43-803
A	1996 to 1997	43-1223		F250 or F350
A	1997 to 2003	43-1185		F150
A	2004	43-1447	43-1199
A	2004	43-1199
B	1997 to 2004	43-1187	43-1185
C	1981	43-713
C	1997	43-1189	43-1297
C	1997 to 1998	43-1297
D	1981	43-755		Can Use 43-711 in pairs, same leaf count, 195lb more load capacity per side
D	1982 to 1985	43-767		Can Use 43-711 in pairs, same leaf count, 210lb more load capacity per side, 43-711 has pressed in RB bushings both ends
D	1986	43-755		Can Use 43-711 in pairs, same leaf count, 195lb more load capacity per side
D	1987 to 1993	43-883
D	1997 to 1998	43-1189	43-1297
D	1997 to 1998	43-1191	43-1297
D	1998 to 1999	43-1297
D	2000 to 2001	43-1451		Duplicate code coverage, Build to Sample Only
D	2001	43-		Duplicate code coverage, Build to Sample Only
D	2002 to 2004	43-1431		Build to Order Only
E	1981	43-711
E	1982 to 1985	43-769
E	1994	43-1111	43-803
F	1981	43-715	43-755	Can Use 43-711 in pairs, same leaf count, 195lb more load capacity per side
F	1982	43-771		Can Use 43-711 in pairs, same leaf count, 195lb more load capacity per side , 43-711 has pressed in RB bushings both ends
F	1987 to 1994	43-879
F	1995	43-1121	43-879
F	1996 to 1997	43-1225		F250 & F350 Only
F	1997 to 2004	43-1193	43-1297	F150 Only
G	1994	43-1093	43-883
G	1995 to 1997	43-1119		Can Use 43-883  in pairs, Same capacity, 43-883 is 4/1=5 Leaf
G	1997 to 1998	43-1195	43-1293	Can Use 43-1297 in pairs, 125lb more capacity or 43-1185, 186lb more capacity (much better price)
G	1997 to 2003	43-1293		Can Use 43-1297 in pairs, 125lb more capacity or 43-1185, 186lb more capacity (much better price)
G	2004	43-1231
H	1981	43-719	43-709
H	1982 to 1984	43-775		Can Use 43-709  in pairs, 115lb per spring more capacity.  43-709 has pressed in RB bushings both ends
H	1985	43-835		Can Use 43-883 in pairs, 380lb per spring more capacity. 43-883 has pressed in RB bushings both ends
H	1986 to 1988	43-865		Can Use 43-709 in pairs, 115lb more capacity per side
H	1994	43-1095	43-721
H	1995 to 1997	43-1117	43-721	F250 & F350 Only
H	1997 to 2004	43-1197	43-1199	F150 Only
I	1994 to 1997	43-1097	43-965
J	1981	43-709
J	1982	43-777		Can Use 43-709 in pairs, 43-709 has pressed in RB bushings both ends
J	1993	43-1079		Can Use 43-883 in pairs, 280lb more capacity per side
J	1994 to 1997	43-1115		Except 1997 F150, (Lightning model,) Build to Sample Only
J	1997 to 2004	43-1203	43-1199	Except 1997 F250, F350
K	1981 to 1982	43-707		Can Use 43-723 in pairs, 365lb per side more capacity
K	1983 to 1986	43-815		Can Use 43-803 in pairs,  220lb per side more capacity
K	1994 to 1997	43-1099	43-689	Except 1997 F150
K	1997	43-1205	43-1185	Except 1997 F250, F350
K	1999 to 2004	43-1205	43-1185
L	1981 to 1991	43-723
L	1992 to 1993	43-1047	43-723
L	1994 to 1997	43-1101	43-723	Except 1997 F150
L	1997 to 2003	43-1207	43-1231	Except 1997 F250, F350
L	2004	43-1187	43-1185
M	1981 to 1986	43-713
M	2001 to 2003	43-	43-1351
M	2003 to 2004	43-1351		F150 Supercrew
M	2004 to 2005	43-1553		Except 2004 F150 Supercrew
M	2006	43-1677	43-1679
M	2007 to 2008	43-1689	43-1679
N	1994 to 1997	43-1105	43-883	F250 & F350 Only
N	1997	43-1199		F150 Only
N	1999 to 2004	43-1199
N	2004	43-1447	43-1199
P	1994 to 1997	43-1107	43-883	F250 & F350 Only
P	1997 to 1998	43-1201	43-1199	F150 Only
P	2004 to 2008	43-1629	43-1555
R	2004 to 2005	43-1361	43-1553
R	2004 to 2005	43-1631	43-1553
R	2006 to 2008	43-1679
S	1992 to 1993	43-1049	43-883
S	1999 to 2004	43-1449		Build to Sample Only
S	2004	43-1559	43-1555	New body style 2004 F150
S	2004 to 2005	43-1561	43-1555	New body style 2004 F150
S	2005 to 2008	43-1633	43-1555
V	1981	43-753	43-709
V	1982 to 1985	43-765		Can Use 43-709 in pairs, 43-709 has pressed in RB bushings in both eyes
V	1986	43-753	43-709
V	1987 to 1981	43-891	43-883
V	1992 to 1983	43-1209	43-883
V	2003	43-1227	43-1233
V	2003 to 2004	43-1433	43-1233
W	1981 to 1982	43-701
W	1983	43-805	43-701	Duplicate code coverage
W	1983	43-841		Duplicate code coverage, Can use 43-803 in pairs 165lb less capacity
W	1984 to 1986	43-803
X	1981	43-717	43-709
X	1982	43-773		Can Use 43-709 in pairs, 290lb per spring more capacity, 43-709 has pressed in RB bushings in both eyes
X	1985	43-837		Can Use 43-883 in pairs, 495lb per spring more capacity
Y	1981	43-693
Y	1987 to 1993	43-889	43-721
Y	1999 to 2000	43-1233
Z	1981	43-723