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installing gears

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by blazing86, May 23, 2001.

  1. blazing86

    blazing86 1/2 ton status

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    im putting a 4.10 gear in the front. Firstr of all,what are the bearing caps? Next what do i tork the ring gear down to? Any other helpful advice. Ill let you guys know how it goes.
    thanks
     
  2. HarryH3

    HarryH3 1 ton status Author

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    Err, ah, um, not to burst your bubble, but if you don't know the answers to those questions, then you'd probably best leave that project to someone that knows how to install and set up a ring and pinion. That's not a good project for a newbie do-it-yourself-er... [​IMG] Do it wrong and you'll be buying all the parts and doing it again in the near future.

    <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...
     
  3. UseYourBlinker

    UseYourBlinker 1 ton status

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    Harry said it...Leave that to the pro's or somebody you know that knows how to do it.



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  4. dyeager535

    dyeager535 1 ton status Premium Member

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    I can speak with experience. If you throw a set of gears in an axle, and expect it to last or even work, you are mistaken. Am I discouraging you? Heck yes. I got lucky ONE time throwing gears into a housing and having it work ok. Other than that one time, you will be plagued by complete and utter destruction of your axle, at the worst, and at best, a constant, ear destroying gear howl before your gears/carrier decide to give out.

    Dorian
    My tech/links page: <A target="_blank" HREF=http://www.dorianyeager.com/index2.html>http://www.dorianyeager.com/index2.html</A>
    No anti-theft measures on your truck? No pity when its stolen
     
  5. ftn96

    ftn96 1/2 ton status

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    But if you insist, the bearing caps are those two big ol strap looking things with 2 Grade bolt heads sticking out of them.
    One on each side of the carrier.
    Proceed with caution if you must.

    My president is Steve Fox.
    90-350TBI-TCI700-241-33"-10 bolts w/4.10's,
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  6. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

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    I am not a mech. My brother is thou. And he didn't want to do my gears. He hadn't done any since he was in school. He talked to another guy that he works with that knows how to do gears. I gave him a couple hundred and we spent a saturday doing them. One thing I learned from this is that I will not do them myself. I am glad we did them the way we did. I learned a lot. But I still wouldn't do them myself........Dan
     
  7. ftn96

    ftn96 1/2 ton status

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    I was the same wya till I got the guts. Wiht good mechanical skills, reading comprehension and patience, did I forget 2 packs of smokes and a sixer?? It can be done. But you really need to do your research first and honestly trust your mechanical knowledge and abilities.

    My president is Steve Fox.
    90-350TBI-TCI700-241-33"-10 bolts w/4.10's,
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  8. blazing86

    blazing86 1/2 ton status

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    as much as you guys wish against me doing it, im still going to. I have talked to many of people about this, and they said it is not as hard as it sounds. Just make sure my clearances are right. There is no way im gonna pay anyone close to $500 justto put in my gears. More than likely i will be having my teacher help m ut with it. Ill let you guys know hoeit goes.
     
  9. gokartergo

    gokartergo 3/4 ton status Staff Member Moderator

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    Not trying to talk you out of it. Just worning you about what you are getting yourself into. Best of luck and let us now how they come out.....Dan
     
  10. ftn96

    ftn96 1/2 ton status

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    Just do your research, and get familiar with the parts. Thats all I was saying. If your motivated, then by all Means get your ass in there and kick some A$$

    My president is Steve Fox.
    90-350TBI-TCI700-241-33"-10 bolts w/4.10's,
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  11. UseYourBlinker

    UseYourBlinker 1 ton status

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    Try to get some pictures,or diagrams.....They'll help ya!


    HAVE FUN!!



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  12. Burt4x4

    Burt4x4 3/4 ton status

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    I suggest you do a seach for my post about my "GeenHorn R&P Swap". I fyou just search for the word GreenHorn it should pop up. It was just last week so shouldn't be too far back. I have completed my front rebuild and will be reinstalling the rear this weekend. It is doable in the drivway but there are allot of tips & tricks that will help you out on that post I mentioned above. I still don't know if mine are gonna work right but hey time will tell.........

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

    Mud Bath Registered Member

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    they easy part is taking out all the crap. Wait till you have to get all of the bearing on and off of their( if they are getting replaced)
     
  14. 1bad82k5

    1bad82k5 1/2 ton status

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    In high school my friend and I did an r&p swap on his J**P. The results were disastrous. Unless your adjustments are absolutely correct, the diff will not last long. If you read up, and get the proper tools, and take your time anything is possible. but be careful, as this can be an expensive mistake.
    eric

    Hell, it don't really matter....it's just for my race car.
     
  15. Mudzer

    Mudzer 1/2 ton status Author

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    I would assume since you have an 86 K5, you probably have the 10 bolt frontend. I will tell you one thing, I feel a GM axle is easier than a Dana 44 to setup. Both can be easy if you have the proper tools. Here are the tools you will need as a minimum:

    Pinion Depth setting tool From Jegs (ProForm brand $109)

    Bearing Separator tool with puller attachment

    Shop Press - I bought a Harbor Freight Tools 12 Ton press for this job

    Torque Wrench

    Impact Wrench with enough balls to torque over 300 ft/lbs for the crush sleeve

    Gear Marking compound

    Install Kit with new ring gear bolts, shims, seals, bearings and stuff.

    By the time you add all these tools up, it is probably the cost of installation by a professional, plus with this - you only have the tools, where a professional would have it installed. Heres one tip I reccomend; get a second set of cone bearings for the carrier (2 reqd.) and hone them out with a high speed air sander with 80 grit drum wheel (firecracker). Only remove enough material in the inside of the bearing so it will slide on your carrier by hand. Be careful not to nick or grind on the surface which mates to the carrier (sides of bearing), because this would affect your overall shim settings. With this bearing easily removable, you can sit under the vechicle and add/remove shims on either bearing side to get correct backlash, then tighten it all down and check backlash. After you get correct setting, remove the carrier, makeshift bearings and shims and be careful to install your newly found amount of shims with new bearings which will require pressing on.

    I install my own gears and found out how just one minor adjustment can be catastrophic! My brand new 4.88 gears were destroyed a few weeks ago because I had the backlash about .002" too loose from recommended specs. Just to tell you how much that is, its less than a human hair! My good buddy Todd and I just installed my 4.10 replacement gears and they were installed on the tight side of the recommended specs for a Dana 44 (.006"). I will test them out this weekend.

    Now, if you think you will be able to pull gears from one housing and install them into another without checking pinion depth, pinion preload, backlash, and pattern (in that order) you are going to have bad results. Housings are very different, in fact no two are the same. For instance, when checking pinion depth, you do not just simply measure from the bearing cap surface to the pinion face. This measurement would not be correct until you determined that the cap surface is on the exact axle/carrier centerline. I checked my 12 bolt housing and it was .022" off center. All housings are done this way. The caps are merely machined, mated to the surfaces, then align bored to maintain center, this does not mean tha cap mating surface is true center. Make sure your shop teacher has the proper tools before beginning this task. Make sure he checks pinion depth, pinion bearing preload, carrier bearing preload, backlash and pattern. You cannot simply install the gears and check pattern. I have had success in doing this before on my 12 sec. Firebird, but I would never do it again because of what I know now. Be aware that loose backlash is bad because your pinion separates from the ring gear under load, creating more backlash (gap), thus breaking teeth off either the ring gear or pinion. Also remember if you get it too close, you will have major wear and heating problems (Ask Layne[​IMG]) Now one thing that is positive, you are installing gears up front which may not get you stranded if you break, unless you are somewhere really tough. If your truck is full time 4wd, I dont recommend slapping it together. Good luck.

    Mudzer 1978/91 K5
    <font color=blue>www.mudzer.coloradoK5.com</font color=blue>
     
  16. ftn96

    ftn96 1/2 ton status

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    Yeah, everything Mudzer said except one thing.
    The backlash setting can be .004 either way from the recommended setting per Richmond Gear. However, if they recommend .008 I'd make sure it was at .008 if at all possible.
    Mine is set up at .010 and I have put 3000 miles on mine and have had no troubles.
    But each manufacturer may have different req's. Follow them.

    My president is Steve Fox.
    90-350TBI-TCI700-241-33"-10 bolts w/4.10's,
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  17. Burt4x4

    Burt4x4 3/4 ton status

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    OK Mudzer yer freakin me out here[​IMG]...I got my backlash at .08 on the front and will bedoing the rear tonight so wish me luck!!
    So tell me Mudzer what happened when you R&P failed? Busted teeth? Did you loose any other parts in the failure?
    How loud is this gear humm when they are not set up right? Will I beable to hear the humm over my 2chamber FlowMasters?
    Sorry kinda got off topic a little[​IMG]

    72K5[​IMG]Led Zeppelin[​IMG]Rock ON![​IMG]
    <A target="_blank" HREF=http://www.burt4x4.coloradok5.com>http://www.burt4x4.coloradok5.com</A>
     
  18. ftn96

    ftn96 1/2 ton status

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    Burt, what was stamped on the gear for the backlash?

    My president is Steve Fox.
    90-350TBI-TCI700-241-33"-10 bolts w/4.10's,
    <A target="_blank" HREF=http://www.nashvillek5.freeservers.com>http://www.nashvillek5.freeservers.com</A>
     
  19. AMorris1

    AMorris1 Registered Member

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    I too am curious to what happened when you broke your old gears. Today I spent the day rebuilding my second axle (notice I say second). The rear gear install went fine but... I ran out of fluid when filling the front... shouldn't be a problem I thought because I won't drive it in 4wd yet... half mile from my house I was skidding to a stop. In my haste I failed to check the front hubs. Now I have a front axle with a pinion gear welded into it. The reason I bring this up is two fold. First if anyone is working on their own gears, double check and triple check that everything is tight, and that you did everything right. Don't repeat my painful mistake. Secondly if anyone else has any painful stories let me know because I'd like to avoid those too!!
     

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