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D30 regear choice?

Discussion in 'Early CJ5 and CJ6 Tech' started by BlueFlu, Sep 8, 2006.

?

Which gear ratio?

  1. 4.27 good all around

    5 vote(s)
    31.3%
  2. 5.38 great off road

    9 vote(s)
    56.3%
  3. Doesn't matter Bamm Bamm will never be done.

    2 vote(s)
    12.5%
  1. Sep 8, 2006
    BlueFlu

    BlueFlu past owner of some ecj5's

    Hermitage, TN
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    Ok I have a D30 for Bamm Bamm that I will need to regear.
    Already have 2 D44s for it. One is a 4.27 the other a 5.38.
    Both gear sets are available for the D30.
    This will be mostly a trail jeep with very limited hiway use.
    I'll be running an oddfire in it, so, what gear set are y'all running?
     
  2. Sep 8, 2006
    mb82

    mb82 I feel great!

    Charlottesville Va
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    I decided on A. But wished I could have clicked C also.
     
  3. Sep 8, 2006
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    What tire diameter and tranny?
     
  4. Sep 8, 2006
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

    Medford Mass USA
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    Overdrive?

    5.38s would be ok with 33s and a top speed of about 65. Otherwise 4.27.
     
  5. Sep 8, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Mostly trail? 5.38s.
     
  6. Sep 8, 2006
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
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    To me with a v6 I would look at the transmission choice, 4.27 would be my choice with a granny geared 4 speed but if you stick with a 3 speed I would use the 5.38. Saying right now that it won't be used on the street may be a little premature, you'll get it running and then it will be driven at your whim street or trail.;)
     
  7. Sep 8, 2006
    BlueFlu

    BlueFlu past owner of some ecj5's

    Hermitage, TN
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    Guess I should have put stock tranny (3 speed) no OD and 33s maybe 34s.
    What little street pounding it will get will be limited to the trail heads from places like Crawfords. Maybe around here where the speed limit is 45 max.
     
  8. Sep 8, 2006
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    If your certain you don't need to go over 55 or 60, I'd go with the 5.38's...
     
  9. Sep 8, 2006
    BlueFlu

    BlueFlu past owner of some ecj5's

    Hermitage, TN
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    Yes sir I'm sure it will never see those speeds, unless it's on the trailer behind the Ram. R)
     
  10. Sep 8, 2006
    Patrick

    Patrick Super Moderator Staff Member

    Los Alamos, NM
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    Why not? :shrug: I run mine at 65+ quite often.....
    :)
     
  11. Sep 8, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    :iagree:
     
  12. Sep 8, 2006
    BlueFlu

    BlueFlu past owner of some ecj5's

    Hermitage, TN
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    The speed limit where I live is only 45 mph. The interstate is (all three of them here) just not alll that fun in a Jeep to me.
    Its being built for trail use more than a driver type Jeep.
    Heck at the rate its being built we may not have gasoline left any way. :oops:
     
  13. Sep 8, 2006
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Guess I've seen where Billy lives. Here it's normal for the roads to be wiiiiddddeee two and four lanes with speed limits of 65 or greater and long open stretches. :)
     
  14. Sep 8, 2006
    BlueFlu

    BlueFlu past owner of some ecj5's

    Hermitage, TN
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    We do have two four lane roads that go right through Hermitage but they keep the speed down. :( Heck some rds are still 30mph.
     
  15. Sep 8, 2006
    BlueFlu

    BlueFlu past owner of some ecj5's

    Hermitage, TN
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    Guess I'm more wondering how the 5.38s will hold up, the only place I can find that has theme is Randy's, if I recall the Yukon gears are made in India or some such.
     
  16. Sep 9, 2006
    jd7

    jd7 Sponsor

    Nacogdoches,Texas
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    I voted C 'cause we all know no matter how much you get done you're never finished until you sell it.;)
    But I'd go 5.38's it it were me.:v6:
     
  17. Sep 9, 2006
    kamel

    kamel Senior Curmudgeon

    Erlanger, Kentucky
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    If this jeep is to be used primarily off road I'd use the 5.38 gears.

    For heavy off road use it is difficult to get it geared too low.

    For the occasional on road use, an OD would work nicely.

    I don't do any off roading in jeeps any more, but when I did, I always seemed to want another, lower gear that I didn't have when maneuvering up, down, over, under and through whatever.

    kamel
     
  18. Sep 9, 2006
    Posimoto

    Posimoto Hopeless JEEP Addict

    Minden, Nevada
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    5.38's Rule!!!!!!!! They're not easy to come by for a D30 though. I got mine from Randy's but waited 60 days for them. Yukons are well made gears.
     
  19. Sep 10, 2006
    vajeeper

    vajeeper Member

    Blackstone Va
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    5.38s, for all the reasons listed above.
     
  20. Sep 10, 2006
    Project71-5

    Project71-5 BACON

    Gypsum, CO
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    5.38's Jerry, you know thats what you want :D
     
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