Gears
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
AXLE code stamped on the 2nd line...far right of the Warranty Plate, located on the left door face below the latch. Code may/may not have front driving axle info.
Dana ID tag located under one of the bolts that retains the inspection cover to the housing.
Ford 9" rear axle ID tag located at approx. 5 o'clock under one of the bolts that retains the carrier (pumpkin) to the housing.
One or both of these ID tags may be missing by now.
Dana ID tag located under one of the bolts that retains the inspection cover to the housing.
Ford 9" rear axle ID tag located at approx. 5 o'clock under one of the bolts that retains the carrier (pumpkin) to the housing.
One or both of these ID tags may be missing by now.
Fleet Owner
Joined: Dec 2009
Posts: 20,678
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From: NorCal
Consider estimating the rear gear ratio using engine RPM, tire height, and a 1:1 final drive ratio.
As you may recall back in your algebra days, solve for x.
Engine RPM / Engine Speed Calculator
As you may recall back in your algebra days, solve for x.
Engine RPM / Engine Speed Calculator
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Senior User
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From: Herington KS
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Senior User
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So I assume the truck is not running, in which case go to this link http://www.crankshaftcoalition.com/w...ar_ratio_check scroll down and read the "rotating the tires method". Otherwise you will need to pull the covers and count the teeth.
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Brett Foote
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
SM: S = Bright Dark Blue Metallic / M = White.
X143 = F150 4WD Super Cab Pickup.
KBM: KB = Blue Vinyl & Blue Cloth (Lariat) / M = Super Cab.
G = C6.
16A: 16 = Ford 9" Rear Axle / 3.50-1 / No Limited Slip / 3,750 lbs. Rear Axle Capacity / A = Adjustable Steering Column with P/S.
6,400 lbs. Gross Vehicle Weight Rating.
1978.
54 = Omaha NE Ford District Sales Office, where the original selling dealer ordered the truck from.
Senior User
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Ah, I missed that part. But on a truck this old I would never trust the gearing based on the tags, too many years have gone by with opportunities for people to change things. I still recommend double-checking by using the rotating tires method or counting the teeth.
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
Originally Posted by slowrollerzcustoms
i decoded my vin I have 350 gears. 
See post 9.
Ford Parts Specialist
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From: Simi Valley, CA
Crooked used car dealers and owners alike rolled back many odometers before the gov't stepped in (mid 1980's) and made it a felony to do so.
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