1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Axle size

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Old

Jan 21, 2008 | 10:13 AM

#1

Vladimir Hyde

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Joined: Jun 2005

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From: North Branford, CT

Axle size

hey guys, i have a 1988 f150 4x4 with 3.55 gears, do i have an 8.8 or a 9 inch axle, and how do i go about knowing which one i do?

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Old

Jan 21, 2008 | 11:27 AM

#2

Moore558

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Joined: May 2007

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I'm almost positive you have a 8.8" . One easy way to tell is if you have a differential cover that faces the rear of the truck. There should also be a tag on one of the cover bolts that has a bunch of numbers and letters on it that identifies the axle.

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Jan 21, 2008 | 11:35 AM

#3

Conanski

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From: Ottawa, Ontario

You have an 8.8, the 9" was not used past about 1980. There should also be a decal on the drivers door pillar where you'll find axle codes.

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Old

Jan 21, 2008 | 03:53 PM

#4

crazyF250

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Joined: Nov 2005

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I've had 2 82 f150s with 9" in them. but your 88 would deffinately have an 8.8

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