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12 bolt gears

Discussion in 'The Garage' started by lt61173, Jan 23, 2004.

  1. lt61173

    lt61173 1/2 ton status

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    Can anybody tell me what the difference is between a car 12 bolt ring and pinion and a truck 12 ring and pinion?
     
  2. Beast388

    Beast388 1/2 ton status

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    [ QUOTE ]
    Can anybody tell me what the difference is between a car 12 bolt ring and pinion and a truck 12 ring and pinion?

    [/ QUOTE ]

    The only similarity between the car 12B and truck 12b is that they both have 12 bolts on the cover. They don't share any parts between the two. The pinion stem diameter on the car is 1.625" and the truck is 1.438".

    So in other words, what are the differences?......Everything. /forums/images/graemlins/thumb.gif
     
  3. bablazer73

    bablazer73 1/2 ton status

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    ummm... there not the same??
    12 bolt truck, 8.875 dia ring gear, 1.438 dia pinion
    12 bolt car, 8.875 dia ring gear, 1.675 dia pinion
    Thats from my Richmond gear catalog.
     
  4. Beast388

    Beast388 1/2 ton status

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    Also, the diffs don't look anything like each other.

    Truck:
    [​IMG]

    Car:
    [​IMG]

    /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif /forums/images/graemlins/thumb.gif
     
  5. zakk

    zakk 1/2 ton status

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    5.13's
     
  6. lt61173

    lt61173 1/2 ton status

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    Thanks, So it is the pinion.
     
  7. R72K5

    R72K5 Banned

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    yes car pinion is larger than truck, truck got skimpy
     

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