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Torque Specs for GM Corp 12 Bolt

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Mike80K5, May 31, 2001.

  1. Mike80K5

    Mike80K5 Newbie

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    I got a chrome diff cover from LMC for my rear differential, but it doesn't have the torque specs. Anyone know what they should be?
     
  2. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Those covers for differentials are to be torqued around 15 ft. lbs.

    When In Doubt, Whip It Out!
     
  3. POWERMAD

    POWERMAD 1/2 ton status

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    I'm takin a stab at this but around 20lb-ft should be good.
    I would recomend loc-tite too.
    A buddy of mine just put one of these covers on and for some reason the bolts backed off and the lube leaked out and ... well lets just say he is now putting in another axle.
    See ya

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

    JunkYardCrawler 1/2 ton status

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    i dunno what the exact torque number is. i just put it down till they are tight enough so it wont leak and dosen't squish the gasket. in the haynes manule it sez to tighten all the bolts securely. hope this helps

    Going nowhere everybody is a Moto Psycho
    Got my wheels in motion and i got a path to beat
     
  5. 89Blazin

    89Blazin 1/2 ton status

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    My Haynes manual says "clean the gasket mating surfaces of the housing and plate, apply thin layer of RTV, align the bolt holes and press into place, tighten bolts SECURELY" !! Well no sh!t. No torque values listed in any of the tables either. Sometimes Haynes can be the PAINS...lol.

    85 Burb and an 89 Blazer
    One just for fun, one simply for pleazer
     
  6. thatK30guy

    thatK30guy 1 ton status Premium Member

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    Thats why I use original GM parts catalogs. They have every listing for torque specs anybody could ever ask for!!! Beware, these catalogs are not cheap, either!!!!!!!!!! [​IMG]

    When In Doubt, Whip It Out!
     
  7. Executioner

    Executioner 1/2 ton status

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    Most don't go to the trouble of using a torque whench !
    But since you asked I say 25-35 lbs./ft. would work.
    Good luck
     
  8. '73 K5

    '73 K5 1/2 ton status

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    I just put a new cover on my Dana 44 front axle and my shop manual said 35 foot pounds for it. I'm pretty sure the rear axle would be close to the same thing. 30-35 would be safe.

    '73 K5
    Chevy good...Ford bad
     
  9. BillyBob

    BillyBob 1/2 ton status

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    I got one of these covers on the 12 bolt of my 87. The truck came with it on, and I didn't pay much attention to it. However, the first time on the rocks, the lip on the thing was kaput. If you're gonna beat your rig, there's really no reason to have a chrome cover. Just figured I'd share

    <A target="_blank" HREF=http://billybob.coloradok5.com>http://billybob.coloradok5.com</A>
     
  10. Thunder

    Thunder 3/4 ton status

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    My GM shop manual says 20 foot pounds. It is the same for all GM corp axles
    The Dana axles torque to 35 foot pounds.
     

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