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Decode Diff?

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Old Mar 30, 2008 | 08:33 AM
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Decode Diff?

Can Anyone Tell Me What I Have Here? It Is A 9" Rear End And The Tag Says Wdm-8j 88d 75 9 378b. Thanks
 
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Old Mar 30, 2008 | 11:09 AM
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Are you 100% sure on the numbers? Nothing I have seen shows a WDM-8J. A WDM-BJ is an open 2.75 with 31 spline axles. Also, there is possibly a 2 before the 75...there would be a blank assuming this is not a locking diff. (2 75)
 
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Old Mar 30, 2008 | 01:25 PM
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regular 9" open diff with 2.75 ratio
Yes it is WDM-BJ
 
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