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4.10 vs 4.11 gear ratio

Discussion in '40- & 55-Series Tech' started by bull, Aug 14, 2006.

  1. bull

    bull

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    I need to put to rest a thought I had the other day. I'm putting a e-locker in my front axle and want to know a thing or two about a thing or two...

    80s diff gear ratio is 4.10

    1978 diff gear ration is 4.11


    They look different on paper...but are they really?
     
  2. woody

    woody unhelpful spotter Staff Member Admin

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    .01 is a common difference.....being even .03+ off was common for many, and won't effect offroadability (9" versus D44, etc)
     
  3. theo

    theo

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    Ring gear # of teeth / Pinion gear # of teeth

    37/9 vs 41/10

    I once heard that Willys used to put higher gears in the front diff so it would tend to pull the front end a little faster than the rear. Keep it pointed. Couldn't find any evidence though.
     
    Last edited: Aug 14, 2006
  4. bull

    bull

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    So it's ok...I'm ok and we are ok? Simple mathmatics states it shouldn't matter, but I have learned not to be so logical. Thanks for the replies..
     
  5. pappy

    pappy photosynthesizing Moderator

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    I hope it doesn't matter. That's exactly what I'm doing.
     
  6. Fast Eddy

    Fast Eddy

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    It's a difference of about 1" per revolution with 33s. I think it will be fine.
     
  7. dieselcruiserhead

    dieselcruiserhead

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    I ran a 4.1 in ond diff and 4.11 in the other on my last LC, did not make a difference whatsoever..
     
  8. spotcruiser

    spotcruiser Geezer SILVER Star

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    I thought about that too, Rodney, but figured the difference was too small to be of concern. How is the install going?

    Todd.
     
  9. projektdotnet

    projektdotnet

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    IIRC only while locked in 4wd on pavement would it make even the slightest of differences period?
    Also please post up a good writeup when you're done i'm still trying to decide which way to go with locking mine this winter
     
  10. dieselcruiserhead

    dieselcruiserhead

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    I guess the difference in tires and from inflation and deflation can be something like upto .05 in gear ration difference. There is a famous ford that is a 3.54 in the front and 3.50 in the rear.. Less than 4.10 and 4.11 if you get my drift.. Sereiously, on or off payment, it is all a non issue that I wouldn't put much thought into.. I asked this same question years ago before my install on Pirate, and got the same exact response I have now just posted, and they were all right..
     
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