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14ff ring gear diff numbers.. what ratio?

Discussion in 'The Garage' started by 78Suburban, Jul 28, 2006.

  1. 78Suburban

    78Suburban 1/2 ton status

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    Ok, I pulled my 14ff cover, it all looks good in there. open carrier :D

    3 GM 3992484 11 41 2 78

    that's on the ring gear. What ratio is it? My guess from the driveshaft turning trick was 3.73. Was I right?
     
  2. divorced

    divorced 3/4 ton status

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    3 GM 3992484 11 41 2 78


    3992484 = part number

    11 41 = gear ratio. 11 pinion teeth and 41 ring teeth. 41/11=3.73

    2 78 = date code



    .
     
  3. YZEATER

    YZEATER 1/2 ton status

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    3.73 is your ratio. see the 11 and 41? divide 41 by 11.
     
  4. 78Suburban

    78Suburban 1/2 ton status

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    the tire turning driveshaft counting trick DOES work :thinking:.. I was just glad it wasn't a gov bomb!! My lazy butt just not pulled the cover.
     
  5. divorced

    divorced 3/4 ton status

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    Ya, the turn-the-tire method does work well. I usually turn the tire 20 times while someone counts the driveshaft revs. It's real accurate this way.
     

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