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3 series vs 4 series carrier

1838 Views 2 Replies 3 Participants Last post by  big gear head
Catologs show 3.73 gears for both 3 and 4 12 bolt carriers. Is there any differance in the durability of the two? Also which is a better unit, the Moroso, Eaton or Aurburn. They all seem to be priced close.

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The Auburn unit is non-rebuildable, the Eaton is totally service ready, and the Moroso unit is a four series unit with some serious 800 lb springs in the posi unit. Have owned all three, never had a problem with any of them, just depends what gears you're running and how you intend to use the posi.
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