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Old 09-07-2006, 11:31 AM
z 97ford1 z 97ford1 is offline
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rear end axle code.....h9

Someone removed my rearend i.d. tag from the rear so I'm trying to find out what "ratio" my rear is.
The code on the door panel shows "H9" meaning limited slip but where can I get the gear ratio?
I think it is 3.55 but I don't know.
does anyone have a clue?

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Old 09-07-2006, 11:37 AM
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H9 = 3.55 LS

Check the tag on the rear axle though. There have been several reports of non-matching numbers between the door sticker and the rear axle tag.

The tag will be on held on by one of the differential cover bolts. If it's rusted, take a wire wheel/brush to it.

It should start out like "3L55" if it's a 3.55 LS
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Old 09-07-2006, 11:44 AM
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yep, h9 3.55ls
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Old 09-07-2006, 07:46 PM
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Since we are on the subject of missing tags, and you want to know your ratio... but are not too keen on believing the door jamb sticker -

Jack the truck up and do the turns test - 1 complete turn of the driveshaft should equal a slight bit more than 3 1/2 turns of the tire, if you have the 3.55 ratio. Or was that the other way around????

-Kerry
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Old 09-07-2006, 10:04 PM
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Quote:
Originally Posted by kspilkinton
Jack the truck up and do the turns test - 1 complete turn of the driveshaft should equal a slight bit more than 3 1/2 turns of the tire, if you have the 3.55 ratio. Or was that the other way around????

-Kerry
You got that backwards. One complete turn of the tires would equal 3.55 turns of the driveshaft.
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Old 09-07-2006, 11:38 PM
z 97ford1 z 97ford1 is offline
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Actually, I called ford parts and gave them my vin.....last 6 digits and they was able to id it as 3.55-but thanks for the info.
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Old 09-08-2006, 04:14 PM
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That's a pretty common gear in the 4x4's. Someday I will have 4.10's in mine, just can't afford to do two axles
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Old 09-08-2006, 04:14 PM
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