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Truck goes into gear but doesn't move

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by BurjKhalifa, Nov 22, 2023.

  1. Nov 22, 2023 #1
    BurjKhalifa

    BurjKhalifa Bobtail Member

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    Nov 22, 2023
    0
    Hi, I'm having problems with a 96 Peterbilt , Super 10 transmission. Dump truck
    I went up a steep dirt hill, and after that I noticed that the transmission was jumping. After shifting from low to high ( 5-6, 7-8) it would jump and the rpms will stay the same.
    I would drive in 9th gear at 45 mph and the rpms will stay at around 1000 when normally it would go to 14-1500. at some point in 9th gear it marked it was at 60 mph and the rpms would be lagging.
    Anytime i would shift the rpms would stay really high.
    After I made it to my yard, I parked it and tried to move it again and it would not move. In Gear the driveshaft would not spin. However, it does go into all the gears. but releasing the clutch it would not move and it will stay in gear. Starting it gear it did not move either. Would i need to replace the transmission or is it something simple?

    Thanks
     
    BurjKhalifa, Nov 22, 2023
    BurjKhalifa, Nov 22, 2023
    #1
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  3. Nov 22, 2023 #2
    nomud

    nomud Bobtail Member

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    Jan 23, 2020
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    Time for a new clutch
     
    nomud, Nov 22, 2023
    nomud, Nov 22, 2023
    #2
    Magoo1968 and Oxbow Thank this.
  4. Nov 22, 2023 #3
    BurjKhalifa

    BurjKhalifa Bobtail Member

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    Nov 22, 2023
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    clutch is only 1.5 years old. maybe 15k miles max
     
    BurjKhalifa, Nov 22, 2023
    BurjKhalifa, Nov 22, 2023
    #3
  5. Nov 23, 2023 #4
    Last Call

    Last Call Road Train Member

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    If your lucky it might just need adjusted
    But I’am with @nomud you probably need a clutch
     
    Last Call, Nov 23, 2023
    Last Call, Nov 23, 2023
    #4
    Oxbow Thanks this.
  7. Nov 23, 2023 #5
    201

    201 Road Train Member

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    Apr 16, 2014
    high plains colorado
    0
    Listen to this. Once a Mack quad axle for an asphalt company I worked for, the driver stopped on a scale, got his ticket, got back in the truck, put it in gear, wouldn't move. Turns out, the crankshaft broke right before the flywheel. I don't think that's what happened here, and we can speculate all day, but it needs to come apart, sorry. If your old clutch discs have springs, get the extreme duty ones without springs.
     
    201, Nov 23, 2023
    201, Nov 23, 2023
    #5
    Keepforgettingmypassword Thanks this.
  8. Nov 23, 2023 #6
    Ban1

    Ban1 Bobtail Member

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    Nov 22, 2023
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    Doesn’t matter if you’ve burnt it up. Which sounds like what’s happened.
     
    Ban1, Nov 23, 2023
    Ban1, Nov 23, 2023
    #6
    W923, Bean Jr., Gridaxe5588 and 3 others Thank this.
  9. Nov 23, 2023 #7
    little cat 500

    little cat 500 Road Train Member

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    Abbottstown PA
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    input shaft broke ?
     
    little cat 500, Nov 23, 2023
    little cat 500, Nov 23, 2023
    #7
  10. Dec 2, 2023 #8
    BurjKhalifa

    BurjKhalifa Bobtail Member

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    Nov 22, 2023
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    replace transmission n it worked. Clutch was fine
     
    BurjKhalifa, Dec 2, 2023
    BurjKhalifa, Dec 2, 2023
    #8
    JB7 Thanks this.
  11. Dec 3, 2023 #9
    xsetra

    xsetra Road Train Member

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    I would have replaced the clutch and all the working parts along with having the flywheel turned, while the transmission was out.
     
    xsetra, Dec 3, 2023
    xsetra, Dec 3, 2023
    #9
    Keepforgettingmypassword Thanks this.
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