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difficulty of re-gearing

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by xnoahx, Jun 7, 2001.

  1. xnoahx

    xnoahx 1/2 ton status

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    How hard is it to honestly re-gear an axle without ever doing it or seeing it done? I would like to do it myself if i can. I do all of my engine work with includes cam change, intake manafold and new cylinder heads so im not without technical know how. But i eally would appreciate honest answers. I know that if i do it wrong it can really mess things up.

    Check out my 73 K5 http://members.theglobe.com/xnoahx/73k5.htm
     
  2. '73 K5

    '73 K5 1/2 ton status

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    Ask Burt4x4 about it. He was a rookie when it came to gears and just did a R&P swap on his truck. I'm sure he could give you some good advice.

    '73 K5
    Chevy good...Ford bad
     
  3. POWERMAD

    POWERMAD 1/2 ton status

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    As a mechanic with all the tools nececary to to it and having done this it is no problem for me.
    for the first time guy it can be a little tricky but it aint rocket science.
    here is a link that is realy good at explaining this.
    <A target="_blank" HREF=http://www.differentials.com/install.htm>http://www.differentials.com/install.htm</A>
    I don't know why people shy away from this . It isn't a "blackart" and can be done by anyone with a few basic tools that most have in their tool box's anyway.
    At most you will need a dail indicator.
    And if you are going to be doing a cam get a degree kit.
    That will have all the necessary tools to all kinds of stuff.
    Summit has them for $90 or so.
    From there you can do alot of of your own work.
    Remember you can never have enough tools.
    There aint nothing to it but to do it!
    See ya

    my truck's not dirty, it's earth tone paint
     
  4. POWERMAD

    POWERMAD 1/2 ton status

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    Before I get flamed
    You will also need an inch LB torque wrench and the ability to torque the crush sleeve.
    Which aint easy unless you have that handy dandy tool that bolts to the yoke.
    I have a 6" x 1/4 " piece of flat bar that I cut a hole in and drilled a couple of holes in .
    It is 3 ft long .
    It works realy good and it cost me nothing as I work around steel and it was scrap.


    my truck's not dirty, it's earth tone paint
     
  5. Burt4x4

    Burt4x4 3/4 ton status

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    Ahhh yes it can be done in the driveway! I did allot of research here and other books and websites. Do a search here for the word greenhorn and that should take you to my posts that have a BOAT load of killer info! Dana and GM have diferent styles of assymbly so depending on what you have under your 73 will determine what type of info is valid. Dana axels don't have a crush sleave and the carrier shims are inbetween the bearing and carrier so I bought a 99 dollor shop press that helped me out a ton!! 12 tons worth heheheh
    Good luck and oh ya it took me 3 1/2 weeks a total of about 30 hrs to swap front and rear but I also did a complete front end rebuild hub to hub!! and I took my sweet time AND Freakin Mr. Murphy showed up a couple of times so I had to stop kick his a$$ and then move on!![​IMG]
    GoForIT
    Later

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <A target="_blank" HREF=http://www.burt4x4.coloradok5.com>http://www.burt4x4.coloradok5.com</A>
     
  6. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    If Dana axles do not have crush sleeve, what is used to set pinion bearing preload?

    If you didn't built it yourself, how can you call it yours.......?
     
  7. ftn96

    ftn96 1/2 ton status

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    The pinion nut,

    Steve Watson for President, 2004.
    Jimi Hendrix was re-incarnated in 1990 as my....JIMI
     
  8. HarryH3

    HarryH3 1 ton status Author

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    I think it goes like this. Put shims on the pinion shaft. Put it together, tighten it down, check the preload. Take it out, adjust the shims, put it back together, check the preload. Repeat until the preload is within specs.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
    It's a great day to be alive...
     
  9. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    I'm not saying your incorrect (because I have been known to be wrong myself) but from all the tech articles and Richmond Ring and Pinion Gear setup video, what you say does not make sense because the shims are used to correct pinion depth (or what Richmond calls "Checking Distance"). If you set the proper pinion depth by adjusting shim thickness and pinion bearing torque is off, then adjust shims to get pinion bearing torque set, you will throw pinion depth off. If I remember correctly there are three types of ring and pinion setups. Two types (the most common) use conventional crush sleeves while the Dana style uses a crush collar. Same concept (pinion bearing preload), but look totally different. It looks like (from the video) a thick weird looking washer. I have done Ford 9" rears and a Chrystler (Both were crush sleeve style) but never a Dana. Would anyone be able to clarify who has rebuilt several Dana's?

    If you didn't built it yourself, how can you call it yours.......?
     
  10. ftn96

    ftn96 1/2 ton status

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    All I know is 10 bolts. So I will bow out of this one. Ask Burt, he just did a Dana.

    OR you can PM Executioner, He is sure to know the FACTS.[​IMG]

    Steve Watson for President, 2004.
    Jimi Hendrix was re-incarnated in 1990 as my....JIMI
     
  11. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    I just sent a PM to Executioner. I will update when he lets me know the facts.
    If you didn't built it yourself, how can you call it yours.......?
     
  12. Leadfoot

    Leadfoot 1/2 ton status Premium Member

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    This just in, straight from the horse's as..........I mean mouth.
    **********************************************************************
    I was wrong (imagine that).[​IMG]
    There are two sets of shims on the Dana's. One set to establish pinion depth and once that is within specs, there is another set of shims to set pre-load. Just an FYI and thanks for the FACTS from Executioner [​IMG] [​IMG]



    If you didn't built it yourself, how can you call it yours.......?
     
  13. Executioner

    Executioner 1/2 ton status

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    Your welcome, I hope you understood my PM.
    Burt4x4 Fyi there are some Dana(Spicer) diffs that use a cruch slevve, just not the 44

    F?96
    The nut is not used to set per-load, that's why you are giving wrong information.
    Even the GM 10 bolt the pinion bearing pre-load is not set with the nut, and this is a FACT
    Sorry if you disagree.
     
  14. Burt4x4

    Burt4x4 3/4 ton status

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    I have acctually been working today so just got back to the board and look at all the GOOD stuff I missed!!!
    OK FACT boy MY axels D44 front and D60 rear do Not have crush selaves collors nadda nothing kaaput! I have no more experiance with any other axel than my own.
    The pinion depth is adjusted by shims that go between the inner bearing race and housing. The pinion bearing preload is adjusted by shims that slide onto the pinion it self and push on the outer bearing. The more shims the tighter the preload!
    and that is it! you can even write that down as a Fact! with a disclamer that says "Burt's Dana44 Front & Dana60 Rear".[​IMG]

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <A target="_blank" HREF=http://www.burt4x4.coloradok5.com>http://www.burt4x4.coloradok5.com</A>
     
  15. Executioner

    Executioner 1/2 ton status

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    Go back to work, I think you working to hard. Look at your previous post,
    you said Dana axels don't use crush slevves. Yes you did................................
    And them is the FACT's
     
  16. Burt4x4

    Burt4x4 3/4 ton status

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    Your right I did say that and they don't! Atleaset mine don't hehehe! I have no idea if ALL Danas donot or do, I only know that my D44 & D60 do not. ok enough said the horse is dead, No Exec that's not a factual horse it's fiction not fact that the horse is dead...heheh [​IMG]

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <A target="_blank" HREF=http://www.burt4x4.coloradok5.com>http://www.burt4x4.coloradok5.com</A>
     

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