axle code question

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Mar 30, 2009 | 09:03 PM

jonnysteals

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axle code question

I already looked in the tech folder. My axle code is 37. its an 05 superduty diesel lariat. Does anyone know what gear ratios this is. Im hoping for 4.10s because I run a 38 inch tires. In the tech folder they list 36 which is 4.56 gears. I doubt I have 4.56 but trying to figure out what my truck came with stock. Im changing my rear diff cover and need to know if I have to add the clutch modifier. Does anyone know how much fluid I need to buy as well. Thanks.

Mar 30, 2009 | 10:46 PM

PowerStrokeHD

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37 = 3.73 Non-Limited Slip

Mar 30, 2009 | 10:50 PM

powerstroke72

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From: SW Virginia

I think you just didn't go far enough down the page. In the tech folder, it lists 37 as 3.73 open diff. Look down in the SD tech folder at post #9 by IB ADRIAN.

Mar 31, 2009 | 07:27 AM