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Old 02-19-2014, 04:05 PM   #1
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Is there a mystery number in the VIN?

I recently spoke to a dealer who told me you could find the axle ratio of a truck from the VIN number.

Is that true? Sounds odd but I would like to know before I buy.

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Old 02-19-2014, 05:54 PM   #2
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If you get you vin and go to a dealership they can tell you what your gearing will be.

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Old 02-19-2014, 06:03 PM   #3
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Usually yes. 10th character is year.
What is the vehicle and VIN?
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Old 02-20-2014, 09:04 AM   #4
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Every number and letter in the VIN signifies month, day, year, options, plant, engine, color etc.
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Old 02-20-2014, 01:54 PM   #5
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Here is a VIN decoder for lots of vehicles: Free VIN number decoder for any cars
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Old 02-20-2014, 03:56 PM   #6
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The first character of the vin is where it was made
The second and third, as I recall is who made it.
The one just before the center is the year
What is in between is more or less up to the manufacturer
The center one is mathmatically derived from the rest of them (think checksum).

And that's about all I can tell you.
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Old 02-20-2014, 05:22 PM   #7
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If it is a GM you can find it here... GM RPO Codes - Axle & Ratio Identification - Sierra Gear & Axle
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Old 02-21-2014, 04:15 PM   #8
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Here is a generic description of a 17-position VIN.
Position 1-3 = World Manufacturer I.D.
Position 1 = country in which it was assembled: 1 = USA, 2 = Canada, 3 = Mexico , 4 thru Z = several others in Europe, Australia and the Far East.
Positions 2 & 3 = Manufacturer. FT = Ford Truck
Positions 4-8 = body style, model, engine
Position 9 = check sum. Ignore it.
Position 10 = Model year
Position 11 = assembly plant
Positions 12-17 = serial number
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Old 02-27-2014, 06:13 PM   #9
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Originally Posted by DavisK View Post
Yea the GM RPO codes are way better than the VIN. They tell you everyting from the negine to the axle ratio to the color codes for the paints and even the make and size of the tires it came from the factory with.

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