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Thread: differentials

  1. #1
    sptrucker is offline Rookie sptrucker is an unknown poster at this point.  Don't let him/her around power tools just yet.
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    Default differentials

    just out off curiosity can anyone tell me what is the difference between regular 40,000lbs differentials,and super 40s.thanks for any info and have a nice evening.

  2. #2
    allan5oh is offline Senior Board Member allan5oh is on the right path.  You could probably safely loan them a quarter.
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    There's no such thing as "regular" 40,000 lb axles. There's still a lot of variation. Super 40's have a GCW rating of 140,000 lbs, most others are around 110,000 lbs.

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    sptrucker is offline Rookie sptrucker is an unknown poster at this point.  Don't let him/her around power tools just yet.
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    thanks for the reply,now i have another question ,what is GCW.

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    allan5oh is offline Senior Board Member allan5oh is on the right path.  You could probably safely loan them a quarter.
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    Gross Carrying Weight. You don't see many super 40's down south because Americans don't haul much weight. Super B's up here are legal to just a hair under 140,000, so you see super 40's a lot more.

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    sptrucker is offline Rookie sptrucker is an unknown poster at this point.  Don't let him/her around power tools just yet.
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    Default

    thanks again allan .

  6. #6
    Les2 is offline Rookie Les2 is an unknown poster at this point.  Don't let him/her around power tools just yet.
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    Quote Originally Posted by allan5oh View Post
    Gross Carrying Weight. You don't see many super 40's down south because Americans don't haul much weight. Super B's up here are legal to just a hair under 140,000, so you see super 40's a lot more.
    Now that there is funny...LMAO

    Nah, 80-86k payload on 5 axles isn't much weight! It's nothing like what, 100-105k payload on 8, 9, maybe 10 axles...LOL

    Sorry you folks up there in the attic are funny sometimes, plus I'm bored...LOL

  7. #7
    allan5oh is offline Senior Board Member allan5oh is on the right path.  You could probably safely loan them a quarter.
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    Thing is an 80k GCW can be put on just about anything, even single axle trucks. Once you go 140,000 GCW you need super 40's or something even larger. I don't know the meritor/rockwell equivalent, there may not be. You might have to go with 46k axles.

    It is not gross carrying weight, it is gross combination weight. The weight of everything, including trailers and cargo.

  8. #8
    Roadhog's Avatar
    Roadhog is offline Board Icon Roadhog is a trusted source of information and would probably pick up your dry cleaning. Roadhog is a trusted source of information and would probably pick up your dry cleaning. Roadhog is a trusted source of information and would probably pick up your dry cleaning.
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    Don't forget us Michigan B-Trains...
    Our 11-axle outfits can legally scale at 164,500-lbs GW.
    We do allot of tandem-nine-quad-nine set ups on the steel haulers.
    My brother-in-law runs one out of the Soo to Detroit.


  9. #9
    allan5oh is offline Senior Board Member allan5oh is on the right path.  You could probably safely loan them a quarter.
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    And your interstates show it! Beat to hell!

  10. #10
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    Roadhog is offline Board Icon Roadhog is a trusted source of information and would probably pick up your dry cleaning. Roadhog is a trusted source of information and would probably pick up your dry cleaning. Roadhog is a trusted source of information and would probably pick up your dry cleaning.
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    No sir.
    I am talking about Michigan B-Trains, and our I-75 is in very good shape.


  11. #11
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    Kranky is offline Senior Board Member Kranky is on the right path.  You could probably safely loan them a quarter.
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    It's not so much the actual weight being put on the ground by the tandems themselves, it's more a matter of the axle shafts & gear sets being stout enough to propel the higher gross combination weight without failing from torsional overload.

    .
    If you can't shift it smoothly, you shouldn't be driving it.

  12. #12
    Les2 is offline Rookie Les2 is an unknown poster at this point.  Don't let him/her around power tools just yet.
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    Quote Originally Posted by allan5oh View Post
    And your interstates show it! Beat to hell!
    Alot of MI's road problems is the ground that they are built on, the trucks and weights they run don't help it much either. But I will agree with Roadhog, 75 is alot better than it used to be.

    I've never heard of super 40's myself. The thing is with hauling heavy, take it easy and just about any rears will last, same goes for the trans. They may not last as long as super 40's or a heavier duty trans but you can still get by if you have to.

  13. #13
    allan5oh is offline Senior Board Member allan5oh is on the right path.  You could probably safely loan them a quarter.
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    People say the same damn thing about our roads in Manitoba. Mind you we have to deal with a deep frost as well as mushy "gumbo" mud that really gives during the spring. Yet go across the line into North Dakota and they have beautiful roads in comparison.

    Hell even the 20 year old roads are nicer than the road they built up here a couple years back.

  14. #14
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    Quote Originally Posted by allan5oh View Post
    People say the same damn thing about our roads in Manitoba. Mind you we have to deal with a deep frost as well as mushy "gumbo" mud that really gives during the spring. Yet go across the line into North Dakota and they have beautiful roads in comparison.

    Hell even the 20 year old roads are nicer than the road they built up here a couple years back.
    Are your roads contracted out like those in Alberta?
    Destroy the cities...
    and they will rebuild them.
    Destroy the farms...
    and grass will grow in the streets of the cities.

    Destroy the economy of the blue-collar worker...
    and grass will grow in the executive offices.

    The bill has come due.
    ( R E T I R E D , and glad of it)


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