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lost bolts need the size

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by reddog64, Nov 17, 2001.

  1. reddog64

    reddog64 1/2 ton status

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    I lost the four bolts that hold up the tranny/xfer case... no it's not in the vehicle right now... I cant find the spacers either... can someone give me the sizes of the bolts and nuts and the specs on the spacers please... I'll go buy new ones in grade 8...
     
  2. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    7/16" NC...spacers are whatever you make em out of.

    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>
     
  3. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Anyone know what size bolts hold tranny to xfer on an SM 465? I am thinking they're 3/8" NF, but I haven't fully invesigated yet.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  4. reddog64

    reddog64 1/2 ton status

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    Thanks Rene!

    Grade 8 is ok right...
     
  5. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Grade 8 is ALWAYS good. :)

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     
  6. chevyracing

    chevyracing 1/2 ton status

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    Grade 8 is okay. Hardened is much better.
    John

    Like to go sloppin' 'round in da mud in a rapid fashion....=)

    <a target="_blank" href=http://coloradok5.com/gallery/albun31?&page=1>See my pics here</a>
     
  7. reddog64

    reddog64 1/2 ton status

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    grade 8 or hardened what's the difference??? how can I tell apart...
     
  8. chevyracing

    chevyracing 1/2 ton status

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    Hardened bolts are generally black, like head bolts, manifold bolts, etc. Standard grade 8 bolts are usually zinc or silver in color.

    John

    Like to go sloppin' 'round in da mud in a rapid fashion....=)

    <a target="_blank" href=http://coloradok5.com/gallery/albun31?&page=1>See my pics here</a>
     
  9. reddog64

    reddog64 1/2 ton status

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    so just spend a few extra bucks and get hardened to be safe :) ???
     
  10. chevyracing

    chevyracing 1/2 ton status

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    Oh, and the difference is tensil strength, grade 8 have a much higher tensil strength and are less like to stretch and become loose.

    John

    Like to go sloppin' 'round in da mud in a rapid fashion....=)

    <a target="_blank" href=http://coloradok5.com/gallery/albun31?&page=1>See my pics here</a>
     
  11. JunkYardCrawler

    JunkYardCrawler 1/2 ton status

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    grade 8 are usely the goldish looking one. well worth the extra money.
     
  12. chevyracing

    chevyracing 1/2 ton status

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    Grade 8 can be about any color, depends on who makes them. If you don't know how to read the grades, look at the top of the bolt...You will see some marks on the top (usually) If there are 3 then it is a grade 5, if there are 6 it is a grade 8, if the bolt is black it is usually hardened. Hardened bolts are tempered (heated up extemely hot and dumped in an oil like substance. Hardened bolts are ideal for for a pressure pulling straight up and down, not sideways on the bolts. In my opinion hardened bolts are the way to go for all around strength, grade 8 will do the job but will wear out faster, especially if the are rubbing on something.

    John

    Like to go sloppin' 'round in da mud in a rapid fashion....=)

    <a target="_blank" href=http://coloradok5.com/gallery/albun31?&page=1>See my pics here</a>
     
  13. tRustyK5

    tRustyK5 Big meanie Staff Member Super Moderator GMOTM Winner Author

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    GM used grade 5 or crappier for almost all the mount bolts and stuff. Grade 8 is way overkill for replacement bolts.

    Tim...I think the tranny to t-case bolts are UNC not UNF. 3/8" sounds right though.

    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>
     
  14. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Alright....I'd tried putting a 3/8" NC bolt in there and it went in about one thread and stopped. I didn't want to crank on it with a wrench, figured I'd find out what the correct bolt size is first.

    Tim
    '84 Chevy K10, lifted, loud, fast, and 3/4 ton axles
     

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