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Eaton question please help

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Old 08-12-2017, 11:41 PM
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Hello all, just recently bought what I was told to be an eaton truetrac diff for my 7.5 10-bolt. I don't think it's what I got but I'm not 100% sure. I tried looking on eatons site but I can't find the particular part number anywhere. I have edb 39147 on one side and 31k3 on the other. See pics and someone please tell me what I have! Thanks!!


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Old 08-13-2017, 08:34 AM
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Man that looks very similar to my Detroit Truetrac that I have on my 10 bolt. Obviously I can't say for 100% sure but it sure looks like it to me
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Old 08-16-2017, 10:19 AM
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That looks nothing like a trutrac diff. That is an eaton posi no doubt, but it is not a detroit trutrac. This is:

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Old 08-16-2017, 05:05 PM
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[QUOTE=01ssreda4;19702889]That looks nothing like a trutrac diff. That is an eaton posi no doubt, but it is not a detroit trutrac. This is:

Crap thats what i thought. i hope its worth what i paid for it, i paid 120 shipped, was told it was new. not used but installed once, looks good to me however. i have a 2000 trans am so im upgrading.
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Old 08-16-2017, 05:08 PM
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Those probably go for 350-400 new so id say you didnt do bad. It is likely a cone style clutch posi so you'll need the friction modifier in the oil.
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Old 08-16-2017, 05:30 PM
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Thank you very much for the info!!!
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