Axle Ratio
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Joined: Aug 2002
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From: Denton,TX
Axle Ratio
There should be an axle code on the sticker inside the drivers door that has a code on it. If you tell us what year the truck is I'm sure we could list the axle codes. My axle ratio is also listed on a sticker on the front axle.
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Joined: Mar 2003
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From: Hamilton Ontario
Post Fiend
Joined: Aug 2002
Posts: 5,324
Likes: 1
From: Denton,TX
Axle Ratio
For a 1997 F150, here are the axle codes. Look under the axle label inside the driver's door. sty, the codes you listed don't include a 1997 F150.
18 — 3.08.
19 — 3.55.
26 — 3.73.
27 — 3.31.
H9 — 3.55 Limited slip.
B6 — 3.73 Limited Slip.
18 — 3.08.
19 — 3.55.
26 — 3.73.
27 — 3.31.
H9 — 3.55 Limited slip.
B6 — 3.73 Limited Slip.
Last edited by johnsdiesel; May 22, 2003 at 09:20 PM.
Senior User
Joined: Mar 2003
Posts: 140
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From: Hamilton Ontario
Axle Ratio
Find yer axle ratio on the label in the drivers` door jamb. Match it to the chart. Your owners manual has the towing capacity in it. You need to know exactly what configuration you have. I know guys with a 4.6 that claim they have a pretty high towing capacity. Do a little homework , it`s worth the effort.
Good Luck ,
Sty
Good Luck ,
Sty
Senior User
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Posts: 140
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From: Hamilton Ontario
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From: Central NY and Tug Hill Plateau
Axle Ratio
This can be easy to identify, but what if someone changed the gears without documentation? For positive identificationl you can open up the cover and count the gears on the ring gear as well as the pinion gear, then figure the ratio.
You can also do a calculation using the tire diameter, RPM, and vehicle speed to figure out the ratio. It is not an exact science but it would help to have a somewhat accurate tach.
Go to the Super Duty Forum, look for Super Duty FAQ, go to rolling chassis, then look for the calculators.
You can also do a calculation using the tire diameter, RPM, and vehicle speed to figure out the ratio. It is not an exact science but it would help to have a somewhat accurate tach.
Go to the Super Duty Forum, look for Super Duty FAQ, go to rolling chassis, then look for the calculators.
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Post Fiend
Joined: Aug 2002
Posts: 5,324
Likes: 1
From: Denton,TX
Axle Ratio
Originally posted by backnblack00
This can be easy to identify, but what if someone changed the gears without documentation?
This can be easy to identify, but what if someone changed the gears without documentation?
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