Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

12 bolt front

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by rick4x4, Nov 10, 2001.

  1. rick4x4

    rick4x4 Registered Member

    Joined:
    Oct 25, 2001
    Posts:
    14
    Likes Received:
    0
    Location:
    SHREVEPORT, LA.
    Can some one tell me how hard it is to find a 12 bolt front end for my 85 K-5 and about what it should be$$$$. And will it be worth the time to swap my 10 bolt for the twelve bolt both front and rear. Some one said that finding a 12 bolt w/373 in it would be really hard to do because there are not that many 12 bolt fronts around.
    Thanks
    Rick
     
  2. wayne

    wayne 3/4 ton status

    Joined:
    Feb 1, 2001
    Posts:
    6,178
    Likes Received:
    0
    Location:
    Carlisle, Pa
    The only 12 bolt fronts you will ever find are not factory. They are a custom made axle.

    See <a target="_blank" href=http://coloradok5.com/gallery/Waynes-Toy>Project Mighty Mouse</a> here.
    <font color=blue>Wayne<font color=blue>
    <font color=blue>Happy Trails<font color=blue>
     
  3. walt88

    walt88 1/2 ton status

    Joined:
    May 24, 2000
    Posts:
    430
    Likes Received:
    0
    Location:
    Monmouth County, NJ
    Definately isn't alot of front 12 bolts around. Infact I have never heard of it. Good luck.

    350FI/700r4/NP208c/10b's ORD 4" Shackle Flip/ORD Disconnects <font color=red>NJK5</font color=red><a target="_blank" href=http://groups.yahoo.com/group/njk5club>http://groups.yahoo.com/group/njk5club</a>
     
  4. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,170
    Likes Received:
    1,379
    Location:
    E-town baby!
    I got this interesting tidbit directly from Grim-Reaper.

    <blockquote><font class="small">In reply to:</font><hr>

    Last guy that I ran across on the POR board that thought he had a 12 bolt had a 10bolt with GM12 cast into the side. Somebody else woke up and figured out where the guy was getting "12" from. I had completly forgotten that was cast into many of them. It's on Jan's 79. I haven't looked to see if it's on this 10 I just swapped into my 75.

    <hr></blockquote>

    Kinda explains the confusion. The 12 bolt front unless custom made does not exist.

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  5. HarryH3

    HarryH3 1 ton status Author

    Joined:
    May 31, 2000
    Posts:
    10,384
    Likes Received:
    2
    Location:
    Georgetown, TX
    GM12 is cast into the carrier on the 10-bolt front end out in the garage. [​IMG] Only see GM 5 and the casting numbers on the housing though.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  6. Grim-Reaper

    Grim-Reaper 3/4 ton status Author

    Joined:
    Feb 17, 2000
    Posts:
    7,385
    Likes Received:
    0
    Location:
    Atlanta
    It's a unicorn. You come up with one I'll give you 50 bucks. It has to be a GM axle and it has to have the 8 7/8 ring gear just like a 12 rear.

    Women dig dents and flat paint!
    coloradok5.com/gallery/Grim
    75 Jimmy, Dollar
    Grim-Reaper
     
  7. Jason73K5

    Jason73K5 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    592
    Likes Received:
    0
    Location:
    Fresno, Ca
    The 12 bolt front doesn't exist, plus the 12 bolts are only slightly stronger than your 10 bolt. There are really only 2 other options for front axles. One is the Dana 44, which isn't much stronger than what you have now and probably isn't worth swapping unless yours is broken. The other option is the Dana 60, this one is very strong and is worth it if you can afford it, usually start at about $1000 used. There are other axles that can be used, but they're not as common.

    73K-5: TBI350/TH-400/NP-203/14FF/D44
    Topless, doorless and no tailgate!
    Fresno, CA
     
  8. laketex

    laketex 3/4 ton status

    Joined:
    Feb 17, 2000
    Posts:
    6,220
    Likes Received:
    0
    Location:
    North Texas
    get 2.5 ton rockwells.


    Sherman, Tx
    <font color=red>The blazer's almost on the road....anyone got tree fiddy?</font color=red>
     
  9. HispanicPanic

    HispanicPanic 1/2 ton status

    Joined:
    Mar 21, 2001
    Posts:
    351
    Likes Received:
    0
    Location:
    El Paso, Texas
    i saw someone break one of those rockwells at the Warn Rock Crawling Championship i'll see we got a pic of it or not if we did i'll post it, some crazy stuff man

    <font color=purple>I put the Panic in Hispanic</font color=purple>[​IMG]
    <a target="_blank" href=http://4x4.alloffroad.com>4x4.alloffroad.com</a>
     
  10. Executioner

    Executioner 1/2 ton status

    Joined:
    Feb 22, 2000
    Posts:
    1,530
    Likes Received:
    0
    Location:
    Temp. Ft. Walton Beach Fl. home=Tucson, Az.
    I have 12 bolts front and rear, possi front and rear, and all came from the factory !
     
  11. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

    Joined:
    Jul 23, 2000
    Posts:
    36,170
    Likes Received:
    1,379
    Location:
    E-town baby!
    Whatever Executioner...post some pics.[​IMG]

    Rene

    <font color=green>Dyslexics of the world...UNTIE!</font color=green>
    <a target="_blank" href=http://coloradok5.com/gallery/project_T2> tRusty pics...</a>
     
  12. Nonesuch

    Nonesuch 1/2 ton status

    Joined:
    Jul 16, 2001
    Posts:
    1,467
    Likes Received:
    0
    Location:
    Austin(Leander), TX
    i love your sense of humor Executioner! I just hope you dont get me with it one day!
    Justin
     
  13. muddin4fun

    muddin4fun 3/4 ton status

    Joined:
    Feb 19, 2001
    Posts:
    5,644
    Likes Received:
    0
    Location:
    N Texas
    Prolly not worth it. [​IMG]
    Since they are hard to find [​IMG] it will be hard to find parts so you're better off with a D60 if your willing to do that much work [​IMG]

    Peace and stuff [​IMG],

    Muddin

    <a target="_blank" href=http://www.geocities.com/muddin4fun79blazer>www.geocities.com/muddin4fun79blazer</a>
     
  14. thatK30guy

    thatK30guy 1 ton status Premium Member

    Joined:
    Jan 12, 2001
    Posts:
    32,076
    Likes Received:
    55
    Location:
    .
    Alright!! [​IMG]

    Executioner is baaaack!!! And with his "so-called 12 bolt front axle"!!! [​IMG]

    Come on, man! I'm not picking on you!! Just want to see the pic of it. [​IMG]

    Get the pic posted, (up close - so we can see a good pic!) and I will send you $20 for your troubles. (only if it IS the 12 bolt front axle!)


    I'm not picking my nose...I'm just pointing at my brain!! [​IMG]

    <a target="_blank" href=http://coloradok5.com/gallery/thatK30guy>The K30 Collection</a>
     
  15. Jason73K5

    Jason73K5 1/2 ton status

    Joined:
    Feb 17, 2000
    Posts:
    592
    Likes Received:
    0
    Location:
    Fresno, Ca
    Executioner, pictures please!

    73K-5: TBI350/TH-400/NP-203/14FF/D44
    Topless, doorless and no tailgate!
    Fresno, CA
     
  16. muddin4fun

    muddin4fun 3/4 ton status

    Joined:
    Feb 19, 2001
    Posts:
    5,644
    Likes Received:
    0
    Location:
    N Texas
    <blockquote><font class="small">In reply to:</font><hr>

    I'm not picking my nose...I'm just pointing at my brain!!

    <hr></blockquote>

    Wes...shouldn't you be pointing towards your ...uh ...well ....nevermind

    Peace and stuff [​IMG],

    Muddin

    <a target="_blank" href=http://www.geocities.com/muddin4fun79blazer>www.geocities.com/muddin4fun79blazer</a>
     
  17. 88streetblaze

    88streetblaze 1/2 ton status

    Joined:
    Jun 27, 2001
    Posts:
    314
    Likes Received:
    0
    Location:
    middle of sticks, oklahoma
    i read somewhere that the truck 12-bolts are .125(1/8) inchs smaller than the car 12-bolts. just curious if you know if that is true

    <font color=blue> If sancho knows what good for him, he best go run and hide. Cause daddy's got a new 45.</font color=blue>
     
  18. 88streetblaze

    88streetblaze 1/2 ton status

    Joined:
    Jun 27, 2001
    Posts:
    314
    Likes Received:
    0
    Location:
    middle of sticks, oklahoma
    i read somewhere that the truck 12-bolts are .125(1/8) inchs smaller than the car 12-bolts. just curious if you know if that is true

    <font color=blue> If sancho knows what good for him, he best go run and hide. Cause daddy's got a new 45.</font color=blue>
     
  19. jackedjimmy350

    jackedjimmy350 1/2 ton status

    Joined:
    Oct 20, 2000
    Posts:
    3,141
    Likes Received:
    0
    Location:
    Fort Smith, Arkansas 72901
    i pm'ed him askin if i could see his infamous 12 bolt front...doubt he answers

    [​IMG]Mash Out![​IMG]
    82 Blazer 1 Ton "Big Nasty"
    78 Jimmy 3/4 Ton
    <font color=red>"Red Dawg" </font color=red>
     
  20. Executioner

    Executioner 1/2 ton status

    Joined:
    Feb 22, 2000
    Posts:
    1,530
    Likes Received:
    0
    Location:
    Temp. Ft. Walton Beach Fl. home=Tucson, Az.
    Yes the pinion stem in the car 12 bolt is a little bigger then the truck pinion stem 12 bolt.
     

Share This Page