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You are here: Home Technical VIN Decoding 1973-1979 Ford Truck Rear Axle Codes
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1973-1979 Ford Truck Rear Axle Codes

 
Axle Code
The first two digits of the axle code identify the ratio and capacity of the rear axle. (The third digit of the axle code identifies the ratio and/or capacity of the front axle, if applicable. CLICK HERE to see a complete listing of front axle codes).
 
For reference, this section from the Ford MPC is posted here in it's entirety, to include E-series.
CODE YEAR RATIO CAPACITY MANUFACTURER DESCRIPTION
MAKE MODEL
A2 '73-'76 3.70 3.3M Ford   Limited Slip
A3 '73-'75 4.11 2.78M Ford   Limited Slip
'76-'77 4.11 2.9M Ford   Limited Slip
A5 '73-'76 4.11 3.3M Ford   Limited Slip
B4 '73-'79 4.10 5.3M Dana (Spicer) 60 Limited Slip
B8 '73-'75 3.50 2.78M Ford   Limited Slip
'76-'77 3.50 2.9M Ford   Limited Slip
B9 '73-'76 3.50 3.3M Ford   Limited Slip
C7 '73-'79 3.54 5.3M Dana (Spicer) 60 Limited Slip
C8 '73-'74 3.73 5.3M Dana (Spicer) 60 Limited Slip
'75-'79 3.73 5.3M Dana (Spicer) 60 Limited Slip
D6 '74-'76 3.73 7.4M Dana (Spicer) 70 Limited Slip
D7 '73-'75 4.10 7.4M Dana (Spicer) 70 Limited Slip
G1 '73-'5 3.54 5.05M Dana (Spicer)   Limited Slip
G3 '73-'75 4.10 5.05M Dana (Spicer)   Limited Slip
H1 '74-'75 3.00 3.6M Ford   Limited Slip
'76 3.00 3.75M Ford   Limited Slip
H2 '73-'77 3.50 3.6M Ford   Limited Slip
'76-'79 3.50 3.75M Ford   Limited Slip
H3 '73-'75 4.11 3.6M Ford   Limited Slip
'76 4.11 3.75M Ford   Limited Slip
'79 2.75 3.75M Ford   Limited Slip
H4 '74-'75 3.25 3.6M Ford   Limited Slip
'76 3.25 3.75M Ford   Limited Slip
H5 '76 3.70 3.75M Ford   Limited Slip
H7 '78-'79 3.00 3.75M Ford   Limited Slip
H9 '77-'79 4.11 3.75M Ford   Limited Slip
01 '75-'78 3.00 2.75M Ford    
02 '73-'77 3.00 3.3M Ford    
'78 2.72 2.9M Ford    
03 '73-'75 4.11 2.78M Ford    
'76-'77 4.11 2.9M Ford    
04 '73-'74 4.57 2.78M Ford    
'75 4.57 2.78M Ford   Except E100/350
'75 3.00 2.75M Ford   E100/350
'76 3.50 2.75M Ford   E100/350
05 '73-'76 4.11 3.3M Ford    
'77-'79 2.75 2.75M Ford    
06 '75 3.70 2.75M Ford   E100/350
'77 2.75 2.9M Ford    
07 '75 4.11 2.75M Ford   E100/350
'76-'77 3.25 2.9M Ford   Except E100/350
08 '73-'77 3.50 3.3M Ford    
09 '73-'76 3.70 3.3M Ford    
10 '73-'75 3.25 3.3M Ford    
11 '73-'74 3.50 3.3M Ford    
'75 3.50 3.3M Ford   Except E100/350
'75 4.11 3.6M Ford   E100/350
'77 2.75 3.3M Ford    
'78 2.72 3.75M Ford    
12 '73-'74 3.70 3.3M Ford    
'75 3.70 3.3M Ford   Except E100/350
'75 3.70 3.6M Ford   E100/350
'76 3.70 3.75M Ford   Except E100/350
'76-'78 3.00 2.9M Ford   Except E100/350
'79 4.11 3.75M Ford    
13 '77-'79 2.75 3.75M Ford    
14 '75-'79 3.00 3.75M Ford    
'75-'76 3.00 3.6M Ford   E100/350
'77 3.00 3.6M Ford    
15 '75-'79 3.25 3.75M Ford    
16 '75-'79 3.50 3.75M Ford   Except E100/350
'75-'77 3.50 3.6M Ford   E100/350
17 '73-'77 3.25 3.3M Ford    
18 '73-'76 3.50 2.78M Ford    
'76-'77 3.50 2.9M Ford    
19 '77 4.11 3.75M Ford    
22 '74 4.88 7.4M Dana (Spicer) 70  
'76-'79 3.07 5.3M Dana (Spicer) 61  
23 '74-'79 3.31 5.3M Dana (Spicer) 61  
24 '73-'77 4.10 5.3M Dana (Spicer) 61 B-F100/500
'73-'76 4.10 5.2M Dana (Spicer) 60 P350/500
'75-'79 4.10 5.3M Dana (Spicer) 60  
25  '73 4.56 5.3M Dana (Spicer) 60 B-F100/500
'73-'75 4.56 5.2M Dana (Spicer) 60  
27 '73-'75 4.10 7.4M Dana (Spicer) 70  
28 '73-'79 4.56 7.4M Dana (Spicer) 70  
36 '73-'75 3.73 7.4M Dana (Spicer) 70  
37 '73-'79 3.54 5.3M Dana (Spicer) 60  
38 '73-'75 3.73 5.3M Dana (Spicer) 60  
46 '77 2.72 3.3M Dana (Spicer) 44  
47 '77 3.07 3.3M Dana (Spicer) 44 non-locking
71 '73-'75 3.54 5.05M Dana (Spicer)    
72 '73-'75 3.73 5.05M Dana (Spicer)    
73 '73-'75 4.10 5.05M Dana (Spicer)    

SOURCE: 1973-1979 Ford Truck Master Parts Catalog - Oct. 1979

 

 
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