What diff in my f150
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Ford 9 inch.
There was a tag on one of the studs on the driver side. ("about 5 o'clock" they say)
There should also be an axle code on the sticker on your drive door jamb which also shows your GVWR, GAWR, VIN etc.
There was a tag on one of the studs on the driver side. ("about 5 o'clock" they say)
There should also be an axle code on the sticker on your drive door jamb which also shows your GVWR, GAWR, VIN etc.
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somebody painted over my tag and it can’t be found.
Fleet Mechanic
Joined: Jul 2003
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From: Atlantic Canada
What engine and trans combo to you have?
By 1985, most half tons (with a 9" diff) had either 3.00 or 3.55 gears. From 1983 on, most of them had the 8.8 diff with either 3.08 or 3.55 gears, but the 9" was still used in some applications.
Does this truck have a 302 with an NP435 4spd? For some reason they always had 9" rear ends, right up until 1986.
By 1985, most half tons (with a 9" diff) had either 3.00 or 3.55 gears. From 1983 on, most of them had the 8.8 diff with either 3.08 or 3.55 gears, but the 9" was still used in some applications.
Does this truck have a 302 with an NP435 4spd? For some reason they always had 9" rear ends, right up until 1986.
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it’s got a 351w backed with a c6 auto.
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Fleet Mechanic
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From: Atlantic Canada
Do you have stock size tires and a tach? if yes, what RPM's are you running at 60mph? I would assume it would have 3.00 gears, but maybe lower if the truck has a towing or plowing package, maybe.
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From: Virginia
You should be able to see the outline on the door jamb driver's side, unless they took it off. If you can find it, I would carefully scrape the paint off. Lots of info on there if you can reveal it.
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From: Virginia
Check this place, they may be able to get the info you need from their records. https://www.martiauto.com/index.cfm
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