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SPArKy_Dave

Decoding your F-truck VIN/Chassis no.

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The VIN on the engine or car will be 6 characters long, for example, JG63UM or AL1JYM. These are decoded as follows;


First character = Product source.
A = USA, C = UK, J = Australia and S and U = Japan.

Second character = Assembly plant.
G = Broadmeadows - (Passenger), L = Broadmeadows – (Truck), H = Brisbane and K = Sydney

3rd & 4th characters = Body Series
See below

5th & 6th characters = year and month of production respectively

Therefore;
A = USA source
L = Assembled at Broadmeadows Truck plant
1J = F100 4x2
Y = 1981
M = March

F-Series Body Codes
1J = F100 4x2
4K = F100 4x4
1T = F100 Bronco
2J = F250
3J = F350
5K = F350 4x4
4J = F500
6J = F600
1K = F700
2K = F750
3K = F800 and F8000


Now onto the engines. The engine codes for the F series trucks are unique and not linked to the passenger vehicles and are also relevant to the years of manufacture. Therefore, for the following years, the codes apply as follows;

1970
Engine
D = 4.0 litre (240 CID petrol 6 cylinder)
E = 4.9 litre (300 CID petrol 6 cylinder)
T = 5.4 litre (330 CID petrol 8 cylinder)
Transmission
4 = 4 speed
5 = 5 speed

1971
Same as above except for;
Transmission
3 = 3 speed column shift
B = 3 speed floor shift automatic

1972
Same as above

1973
Engine
D = 4.0 litre (240 CID petrol 6 cylinder)
E = 4.9 litre (300 CID petrol 6 cylinder)
Transmission
4 = 4 speed
B = 3 speed floor shift automatic

1974 (US Drive line)
Engine
L = 4.0 litre (240 CID petrol 6 cylinder)
E = 4.9 litre (300 CID petrol 6 cylinder)
Transmission
L = 4 speed manual floor shift
B = 3 speed floor shift automatic

1974 (Local Drive line)
Engine
L = 4.0 litre (250 CID petrol 6 cylinder)
Y = 4.9 litre (302 CID petrol 8 cylinder)
Transmission
L = 4 speed manual floor shift
R = 3 speed automatic

1975
Same as above except for;
Engine
E = 4.9 litre (300 CID petrol 6 cylinder)

1976
Engine
L = 4.0 litre (250 CID petrol 6 cylinder)
Y = 4.9 litre (302 CID petrol 8 cylinder)
E = 4.9 litre (300 CID petrol 6 cylinder)

Transmission
L = 4 speed manual floor shift
R = 3 speed automatic

1977
Same as above except for the 300 CID engine is no longer available

1978
Engine
B = 5.8 litre (Pre-ADR 36)
C = 5.8 litre (Post ADR 36)
Y = 4.9 litre (2 wheel drive only)
X = 4.9 litre (4 wheel drive only)
L = 4.1 litre (Pre-ADR 36)
H = 4.1 litre (Post ADR 36)
Transmission
L = 4 speed manual floor shift
R = 3 speed Cruisomatic column shift

1979 & 1980
Same as above

1981 and onwards
Engine
W = 4.1 litre 6 cylinder
C = 5.8 litre 8 cylinder (carburetor version)
T = 5.0 litre (fuel injected)
Transmission
L = 4 speed manual floor shift
R = 3 speed Cruisomatic column shift

Now back to the model code. I will start with the easy ones first being the 1978 to 1981 F series trucks. As shown above, the ute in question had a model code of 62112 and it is this number that can be used in conjunction with the following code breaker to find out what you have.

Model
Digits 1 & 2 = Product line (more on this later!)
Digit 3 = Year of manufacture (actually applies to all F series trucks)
Digit 4 = Body style
1 – F100 Chassis Cab
2 – F100/250 Style Side Body
3 – F100 Ambulance and F350 Chassis cab
Digit 5 = Series
1 – F100 Short Wheel Base
2 – F100 Long Wheel Base of F250
3 – F350 Short Wheel Base
4 – F350 Long Wheel Base

So from the above model code of 62112, this equates to;
F100 S-Cab, 1981 build year, F100 Chassis Cab, F100 Long Wheel Base of F250.

Now onto the pre 1978 model codes. According to the book, there are heaps of model codes, especially so for the years of 1970 through to 1972 as the codes covered the F100 all the way up to the F700. Therefore, I am only going to cover a year that is more applicable, namely 1976.

62611 – F100A C.Cab 2972 mm W/B 2586 kg GVM
62612 – F100A S.Cab 3379 mm W/B 2586 kg GVM
62621 – F100A S.Box 2972 mm W/B 2586 kg GVM
62622 – F100A S.Box 3379 mm W/B 2586 kg GVM
62632 – F100A Ambulance 3379 mm W/B 2717 kg GVM
74611 – F250A 2WD C.Cab 3379 mm W/B 3448 kg GVM
74612 – F250A 2WD S.Box 3379 mm W/B 3448 kg GVM
73613 – F250A 4WD C.Cab 3379 mm W/B 3493 kg GVM
73614 – F250A 4WD S.Box 3379 mm W/B 3493 kg GVM
74631 – F350A C.Cab 3480 mm W/B 4536 kg GVM
74632 – F350A C.Cab 4089 mm W/B 4536 kg GVM

As you can see, the two first numbers (Product Line) change according to the type of vehicle required.
 
(info, courtesy of 'Paull', from Ford Australia Forums)

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Great post, very helpful. My vin starts with ak2jjc so from that I've worked out that its American built, assembled in Sydney, an f250 and produced in the year J and the month C.

 

How do I find out what year J and what month C is?

 

My model number is 73911d41 so the year figure there would be a 9 according to this.

Being a bumpside, 250 swb dually, I'd assume that its a 69. Would that be safe to assume?

Thanks, snag.

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  • G'day Sparky Dave and everyone who might help. Hope its ok to start a new thread as well as post it here as I'm not sure if anyone will see it as this thread is older. Sorry if this is long winded. After typing all this out with one finger it seems so. 
  • I just joined this forum to see if you might be able to help. The info you posted on this thread is the most accurate I've found.  
  • I have recently  purchased a Ford F100 1977 long wheel base 4x4 automatic floor shift with a (351 Cleveland maybe). 
  • From what is posted here I believe I have verified I have a 1977 ford f100 4x4. 
  • But that's where I don't know the rest. 
  • The vin is AL4KTR50448K 
  • Model code is 64727 
  • Engine code is Y (I need help here it looks like Y is a 302)
  • Transmission code is L (which is 4 speed manual and I have auto).
  • SDIO code is 929334
  •  
  • Engine number in the truck is JG31RP61522K (which it seems comes up as from a 1975 ford falcon station wagon) but I don't know how to check the engine capacity or other engine specs, heads if I am right about that? 
  • Looking at the block casting it's D43DCA. I don't know what this means but its the square Cleveland block with no numbers on the heads. 
  • When I purchased the guy said he has owned it for 15 years and bought it from a dealer who said the engine had been rebuilt with high compression heads by the previous unknown owner and its a 351 Cleveland. I get between 175 psi to185 psi compression test. 
  • So now I'm on the learning curb trying to figure out the codes to see what I've actually got. which I'm gathering at this point its a 1977 Ford f100 4x4 long wheel base and the engine and transmission have been changed or its the original engine and transmission. Its either a 302 or a 351. The heads look like 351 but what was factory for this vehicle is what I'm after are engine specs for the engine I have and where it originally came from. 
  • Cheers and hope you guys might be able to help out.

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Hi mate, you're correct. JG31 is a Falcon 500 wagon. To check the displacement without removing the sump or heads, pull a spark plug, stick a drinking straw in the hole and slowly wind the engine over by hand/socket. Measure how far up and down the straw goes. 302 had a 3 inch stroke, 351 had a 3 1/2 inch stroke. Heads can be tricky, as to whether they are 302/351 closed chamber or open chamber. I have heard MANY stories/tales of peeps saying they are right, they have a factory blah,blah with special order blah,blah....... obviously the best way is removing the heads and have a look. Depends on what you want to find out. If it's running sweet and not blowing smoke, don't care and drive it like ya stole it.!  

 

D4 engine casting is roughly 1974.  But the numbers dont make sense to my tiny brain. Normally something like a D4DE - 6015.

C is 1960's, D is 1970's, then the actual year,  (so 1974 )D for Falcon, then it usually has an E for Engine. 6015 is block.

 

Hope this gets you started.

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Thanks Bear 

I know your right about checking the displacement through the spark plugs and no doubt I'll be removing the heads in the near future to find out what I have. Plan is to do a serious restoration on this truck and I'd like to look at diff ratios and transmissions to suit this 4x4 to get it more suited to cruising and be as quick as practical of t he mark. I'd like to know more about the origin of this engine and the truck. 

Is transmission code L in F trucks is for a manual?

I gave you the wrong casting number. The block casting number is D2AE-CA  and the casting date is 4A23 I have found a reference to              D2AE-CA here https://www.enginelabs.com/engine-tech/a-guide-to-ford-v8-engine-block-casting-numbers-1952-1996/. If this correct I'm stoked cause it's the Cobra jet engine. But wondering if that engine came out in a wagon? Do you know how the casting and date is decoded. cheers mate.

 

 

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Hmm......... interesting. Guess you wont really know until you pull the sump. Casting date is pretty simple. 4 is the year, A is the month, 23 is the day. So your block was cast in the foundry on Jan 23 1974. Even though your engine block casting number is 1972. (D2) thats the moulds they used, same for several years until they wore out, or changed engines. 

You may find that you just have a 351 2V, but, they used the same block for the Boss, Cobra Jet, etc.. but modified them later for screw in studs, different heads, 4 bolt main caps.

 

Carb, cam, extractors and ignition.

 

Change diff ratio for what you want the Effie to do, Tow truck, quick off the line, fuel economy....

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