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Dana 30 Gear Ratio?

Discussion in 'Early CJ5 and CJ6 Tech' started by Billywam, Sep 25, 2016.

  1. Billywam

    Billywam Billywam

    I bought this Dana 30 awhile back with the intention of swapping it with my Dana 27. The seller told me it was 4.88 gears which is what I needed. Here is what is stamped on the ring gear. Is this 4.88? It has 39 teeth.

    [​IMG]

    [​IMG]
     
    Billywam, Sep 25, 2016
    #1
  2. Keys5a

    Keys5a Sponsor

    Those are 4:88 gears. Divide 39 by 8 (39/8) =4.875. Round up to 4.88.
    -Donny
     
    Keys5a, Sep 25, 2016
    #2
  3. nickmil

    nickmil In mothballs.

    The 377 number is match marks for the ring and pinion. The pinion will have 377 stamped or engraved on it somewhere so you know you are a matched set.
     
    nickmil, Sep 25, 2016
    #3
  4. Billywam

    Billywam Billywam

    Thanks! I was worried it might be 3.77's
     
    Billywam, Sep 25, 2016
    #4