Double Clutching

Discussion in 'Questions From New Drivers' started by PierTrucker, Apr 3, 2012.

  1. DrtyDiesel

    DrtyDiesel Road Train Member

    5,348
    2,598
    Feb 14, 2010
    Jacksonville, FL
    0
    Your not alone. Ive always double clutched on a grade. Wanna make sure it goes into gear. I must be too slow also...

    Ethan
     
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  3. kidsdad

    kidsdad Medium Load Member

    327
    298
    Nov 11, 2010
    central illinois
    0
    I float up, float down. except on a grade, then i double clutch. Every body has their way. no ones right, no ones wrong.
    b
     
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  4. Brandonpdx

    Brandonpdx Road Train Member

    4,249
    4,073
    Dec 27, 2007
    Elkhart, IN
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    I actually like double clutching. And the transmission in my truck seems to prefer it.
     
  5. Pmracing

    Pmracing Road Train Member

    6,354
    3,178
    Jan 28, 2011
    Arlington Heights, IL
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  6. zaptear

    zaptear Medium Load Member

    502
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    Nov 30, 2010
    vermont
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    ya... i rubed 9 to 10th... and that dam seat is getting to me buy the end of the day lol
     
  7. Pmracing

    Pmracing Road Train Member

    6,354
    3,178
    Jan 28, 2011
    Arlington Heights, IL
    0
    My regular cascadia is DD15 and it takes quite a while for the revs to come down. This loaner truck I am currently in drops the revs so quick it is like the jake is on! I have to hold the throttle where I need it to match the gears.

    On the DD15 it dropped so slow that I had the timing down to get the gear in without floating the throttle.

    Mikeeee
     
  8. GasHauler

    GasHauler Master FMCSA Interpreter

    6,257
    4,365
    Oct 23, 2005
    Vegas/Jersey
    0
    I feel the same way as my company does. We only hire drivers with experience and during the road test for hiring we require the driver to show us the usage of the clutch. It doesn't stop there, we want you to show us all you know about shifting. If you know how to float,OK, but we also want to know if you can skip gears on the way down and you always know what gear to be in at any given time. You can get the job if you only double clutch and you do it clean most of the time but you'll never get hired if you only know how to float.


    So I suggest that being a new driver you learn how to double clutch and learn it well before you even think about floating. I've seen alot of times when a driver tries to float and the transmission will bang out of gear because the driver does not know the equipment well enough to make it work for him. The object is to be easy on the truck so the truck works for you and not the other way around. And to do that is to know the truck inside out. My 2¢.
     
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  9. Hanadarko

    Hanadarko Independent Owner/Operator

    2,962
    927
    Oct 1, 2009
    Midwest
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    GasHauler is totally correct.
    I float up and down but when its cold in the midwest, the transmission is very sluggish until she warms up and I double-clutch just to make life easier....
     
  10. EHB

    EHB Medium Load Member

    491
    209
    Apr 26, 2011
    Newfoundland
    0
    It all depends on the the truck and transmission and what RPM your at.a
    All trucks are not going to be the same.

    You could have the same make and model of truck and same make and model transmission but could shift totally differently.

    Some truck gears ya may have to double clutch other you many not to have to at all.

    Some times power shifting may work all the time.

    Or some times power shifting ever gear except one gear so you may have to double clutch only that one gear on the transmission because it is beening a pain in the but.

    EXAMPLE. Gears 1 to 6 are aok to power shift, gear 7 you have to double clutch, Gears 8 to 10 are aok to power shift.

    Remember most trucks now a days use a standard "H" pattern on Manuel transmission going up and down threw gears in order.

    But that not the case on all Manuel transmissions.

    Some you may come across are very strange one like on some old fords trucks, like an 8 speed that is not in order.

    "Ford Shift pattern Decal - 8 Speed Transmission - DEC451"

    1 2 4
    ]-]-]
    3 R

    5 6 8
    ]-]-]
    7 R

    So double check the Shift pattern Decal and owner manuel....

    "IT IS NOT CALLED A CRASH BOX FOR NOTHING"
     
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