Need help decoding rear axle tag

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Nov 26, 2006 | 05:00 PM

Sweet Christine

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Need help decoding rear axle tag

Hello everyone!

I need help decoding the little metal tag attached to the rear axle. I have a 1992 F250 4 x 4 with a 351/auto. The tag has two rows of numbers/letters:

" 2 V1240 "
" 3.55 10 2 1 H02"

I think the 3.55 is the rear axle ratio. I want to know what type of rear end it is and what type of fluid I should put in it for maintenanace purposes?

Thanks everyone!

ps. is there an easy way to i.d. the front axle too?

Nov 26, 2006 | 05:07 PM

77bigblock

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From: Sussex

The best way to find out what you have is to look on the drivers door post. Look on the sticker their under axle and see what the codes say. You do have 3.55 gears. If you have a letter with a number, then you have limited slip and will need some additive. If you are changing the differential oil, then I would put synthetic in it. If you have a F250 HD you have a 10.25 full floating sterling rear with a D50 front. If you have a F250 LD then you have a D44 front and semi-float something else in the back.

Nov 26, 2006 | 05:17 PM

Sweet Christine

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Decoding rear axle

Thanks.

I looked at the door tag and it says "39" under axle . How do you tell if the truck is an HD v.s an LD ?

Nov 26, 2006 | 05:41 PM

EPNCSU2006

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From: Concord, NC

What is the GVWR on the door sticker?

Nov 26, 2006 | 05:47 PM

Sweet Christine

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Ok , this sticker says GVWR 8600 lbs

Nov 26, 2006 | 06:04 PM

Sweet Christine

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Is it a HD?

Nov 26, 2006 | 06:14 PM

77bigblock

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From: Sussex

http://www.drivetrain.com/Fordtrkratio_posidata.html

According to this site, it is a full floater. That means you have an HD. I also believe that Ford considered 8500 lbs and over heavy duty.