9 inch gears

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Nov 2, 2002 | 03:05 AM

jcd155

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From: decatur us

9 inch gears

I have a 79 f150 4x4 and I would like to know what the gears are in back.The tag reads
DH CN 9FB
50 9 361A

Nov 2, 2002 | 04:06 AM

Torque1st

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Joined: Sep 2001

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9 inch gears

>I have a 79 f150 4x4 and I would like to know what the gears
>are in back.The tag reads
>DH CN 9FB
>50 9 361A << Are you sure that is not 331A???

If it is 331 then it is a 3.31 rear axle but I don't list any possible axles for a 4x4 with that ratio either. I don't list any 3.61 axles, but then the Chilton's manual that I have for your year does not list my 78 truck's 3.07 rear axle ratio either.

You may just need Mil1ion's help on this one or check with the trans forum.

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Nov 2, 2002 | 09:52 AM

tellico racing

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Joined: May 2002

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From: Southwestern Michigan

9 inch gears

>I have a 79 f150 4x4 and I would like to know what the gears
>are in back.The tag reads
>DH CN 9FB
>50 9 361A

Look real close at the bottom line, the first number is partially hidden by the bolt holding the tag on,,it may read 350 9 361a

if that is the case i believe it is a 3.50:1 ratio/open diff

Nov 2, 2002 | 07:22 PM

jcd155

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From: decatur us

9 inch gears

thanks for the info I'll remove the nut and see in the morning.

Nov 2, 2002 | 11:22 PM

bigf150

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Joined: Jan 2001

Posts: 380

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From: Meriden USA

9 inch gears

it has a 3:50 ratio. good luck!

Nov 3, 2002 | 03:01 AM

Torque1st

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Joined: Sep 2001

Posts: 30,255

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9 inch gears

Thanks guys! It has been several years since I looked at one of those tags. Has anyone seen a tag layout and decoder for these, kind of like a VIN or door tag decoder?

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