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Axle ratio help

Discussion in 'Early CJ5 and CJ6 Tech' started by Grumpy58, Oct 14, 2005.

  1. Oct 14, 2005
    Grumpy58

    Grumpy58 New Member

    Galway, NY
    Joined:
    Sep 22, 2002
    Messages:
    41
    I searched the forum but could not find the answer I was looking for. Does anyone know how to translate the embossed stamping on the axle housings to determined the ratios? I thought there was a reference in a manual somewhere for this but I can't seem to find that either...I must getting old. It'sa '61 and they feel like the gears are a little higher than the 5.38's in my '58. Were 4.88's available in '61?
     
    Grumpy58, Oct 14, 2005
    #1
  2. Oct 14, 2005
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    What are the numbers you're wondering about?

    The numbers that I know of are on the gear not the housing since the housing can have different gears.
     
    sparky, Oct 14, 2005
    #2
  3. Oct 14, 2005
    Grumpy58

    Grumpy58 New Member

    Galway, NY
    Joined:
    Sep 22, 2002
    Messages:
    41
    Thanks Sparky for moving it to the correct location...oops.
    I'll have to check tomorrow when I can see them in the daylight. I seem to recall that my dad and I were able to determine the axle ratio of the 58 by reading the code on the sides of the housing since there was tag left. I'll look tomorrow.
     
    Grumpy58, Oct 14, 2005
    #3
  4. Oct 14, 2005
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
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    9,221
    The tag that bolts on the the outside of the cover has the data you're referring to. So do the gears.
     
    sparky, Oct 14, 2005
    #4
  5. Oct 14, 2005
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
    Messages:
    4,275
    Best bet is by looking at the tag as Sparky mentioned, followed by pulling th cover and looking at the stamping on the ring gear

    Without opening up the diff you can get a pretty close approximation by jacking up the rear and rotating the driveshaft while watching a chalk mark on the inside of one wheel. 5+ turns of the driveshaft = 5.38, < 4 turns = 4.88, a little more than 4 turns = 4.27's, etc.

    HTH. ;)
     
    w3srl, Oct 14, 2005
    #5
  6. Oct 15, 2005
    Chuck

    Chuck Sponsor

    Southshore Ma
    Joined:
    Sep 19, 2004
    Messages:
    1,463
    I would pull the cover just to make sure you know what you have. A typical intermediate ring gear may be stamped (6 983 DANA D 32857 A30348 46-13 665). To find the gear ratio divide 46 by 13 (46/13 = 3.54) another example would be (Salisbury 17483 A3R15 43-8 ) (43/ 8 = 5.38 )
     
    Chuck, Oct 15, 2005
    #6
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