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    buzzfuzz55's Avatar
    buzzfuzz55 Posts: 2, Reputation: 1
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    #1

    May 18, 2008, 10:36 AM
    GM 10 bolt rearend gear ratios
    I have an 85 GMC Jimmy that the rearend has gone out. I would like to know if the stock gear ratio is the 3.73 or 4.11, or did it vary. Thanks
    this8384's Avatar
    this8384 Posts: 4,564, Reputation: 485
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    #2

    May 18, 2008, 11:26 AM
    There should be a tag on the rear differential cover or it might be stamped on the cover itself. That should tell you what the ratio is. If not, you could try calling a dealer with the VIN #; they might still have it on file.
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