change 10 speed to 13 speed

Discussion in 'Ask An Owner Operator' started by PGALLC, Apr 29, 2015.

  1. PGALLC

    PGALLC Light Load Member

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    Apr 29, 2015
    Spartanburg SC
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    Hello everybody im new here .... i have C-15 Cat Acert 435 tuned to 500hp 1850 tq i need to change my tranny now since i have 10 speed that made for 1650 tq
    so I wanna buy 13 speed for 1850 qt and if anybody knows, HOW hard is gonna be to change from 10 to 13 ...

    whats need to be done ? ? ?

    thank you
     
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  3. 315wheelbase

    315wheelbase Heavy Load Member

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    Oct 26, 2014
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    buy a 13spd and replace the 10spd,,might have to shorten the drive shaft ,,if you make the switch make sure your clutch will handle the higher torque too,,many trucks with lower HP and torque have clutches that can't handle higher torque, years ago I had new clutch installed,,about a year later it failed, shop installed a low torque clutch disc.
     
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  4. zinita17601

    zinita17601 Road Train Member

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    Aug 19, 2010
    lancaster pa
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    I had that done last year,needed to add a transmission cooler and depending on what truck you have u may need a different part(the one that bolts the tranny to the engine).also i changed the clutch.cost me 11k total.im running 1500 rpm at 70mph.truck pulls nice and i love not having to loose a whole gear climbing some hills.two to three day job.hope this helps
     
  5. PGALLC

    PGALLC Light Load Member

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    Apr 29, 2015
    Spartanburg SC
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    my 10 speed already have a cooler i wander if it will work for 13 speed as well
     
  6. PGALLC

    PGALLC Light Load Member

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    Apr 29, 2015
    Spartanburg SC
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    ok thanks alot, ya i will change clutch to higher tq... what about trany mounting is it the same for 10/13 speed ... same bolts and everything ?
     
  7. zinita17601

    zinita17601 Road Train Member

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    lancaster pa
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    U need to get the transmission number and check with your mechanic,and like 315wheelbase said u need to shorten the drive shaft and get a new shifter knob and run new air lines.
     
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  8. PGALLC

    PGALLC Light Load Member

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    Apr 29, 2015
    Spartanburg SC
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    ok thank you guys for info :)
     
  9. Skate-Board

    Skate-Board Road Train Member

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    Aug 9, 2014
    Merrimack, NH
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    Most transmissions are a one for one model swap on a rebuilt. They may not give you any credit for your 10 speed or will charge you a hefty price to trade up. You will need a new clutch, clutch brake, shifter head, universal joints and transmission fluid. Your drive shaft will also have to be lengthened or shortened.
     
  10. dannythetrucker

    dannythetrucker Road Train Member

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    May 26, 2011
    everywhere, man
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    you don't HAVE to change it. you're trans and clutch isn't gonna shatter the first time you put 1651 ft lbs to it. If you apply it correctly, not jerking and slamming you'll probably never have a problem.
     
  11. wore out

    wore out Numbered Classic

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    Jun 5, 2013
    CHASIN THE DEVIL'S HERD
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    Like Danny said I would run it. K built a pretty hot 3406E for a friend of mine. His 1650 10 speed has held up 2 years. He is easy on it but according to dyno he is putting almost 700 to the wheels. He says he may retire before he needs to then it's the next guys problem lol
     
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