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2006 Int 4700 not shifting properly

Discussion in 'International Forum' started by Willin, Sep 7, 2019.

  1. Sep 7, 2019 #1
    Willin

    Willin Bobtail Member

    2
    0
    Feb 1, 2014
    Philadelphia PA
    0
    33K GVW. This truck only has 30,000 miles. It's a bucket truck that stays very local.

    Started not coming out of low gears unless rpm's were just right, and then not up-shifting until the RPMs are just right. So I in order to shift I have to run the rpm's kinda high, get it into neutral and then tap the gas a couple of times to get it into the next gear.

    The clutch seems like it has plenty of life, though it needed adjustment. There was no play in the pedal, so I dropped the vent plate, under the throwout bearing and turned the adjuster. Probably over adjusted, as there is about 2" of play in the pedal now. That didn't make any difference. in 3rd with the brake on, the engine dies immediately when the clutch is let out.

    I was thinking maybe it's the synchronizers but seems like it should come out of gear. Only other thing I can think of is that the PTO is not disengaging (it's air-powered). I'll check that this morning. If it's not the PTO, most likely in the transmission. The trans guy was talking 5K + for a new trans. Hoping its a lot simpler and cheaper than that. Any suggestions?

    Thanks,
    Daniel
     
    Willin, Sep 7, 2019
    Willin, Sep 7, 2019
    #1
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  3. Sep 7, 2019 #2
    brian991219

    brian991219 Road Train Member

    3,003
    6,117
    Aug 10, 2013
    Lords Valley, PA
    0
    It sounds like the PTO is stuck engaged, could also be the clutch adjustment is not allowing for full release which will cause your described hard shifting problem.

    Do you know how to float gears, meaning shift without the clutch? If you do, try that (after confirming the PTI isn't stuck on) and see if it falls into gear like it should.

    The Spicer 6+1 that is typically in those trucks is fairly indestructible so 30k local is nothing for a truck like that unless you have had some real poor drivers in the past that ground and forced gears often.
     
    brian991219, Sep 7, 2019
    brian991219, Sep 7, 2019
    #2
    Hulld and MagnumaMoose Thank this.
  4. Sep 7, 2019 #3
    Hulld

    Hulld Road Train Member

    2,884
    6,567
    Oct 19, 2015
    Upstate NY
    0
    I have see this kind of issue on my 4700 flat bed tow truck when someone doesn’t pay attention and then takes off with the pto still engauged.
    I won’t mention who that someone was that took off and didn’t bother to look down and see the red pto light staring him in the face lol
     
    Hulld, Sep 7, 2019
    Hulld, Sep 7, 2019
    #3
    brian991219 Thanks this.
  5. Sep 18, 2019 #4
    devedo

    devedo Light Load Member

    114
    43
    Aug 11, 2015
    0
    Adjustment for the clutch has to be done with the clutch pedal pushed in. Otherwise all you're doing is stripping out the adjusting screw.

    The space between the the clutch brake face and the clutch brake is about the width of an average finger. I use a bolt. Put it up in there and if i can spin it its too loose.

    After adjusting the clutch the pedal free travel will get larger. Theres adjustment rods on your linkage to adjust that. Usually 1 1/2 to 2 inches.

    And don't use the clutch to shift gears. You're just wearing out your clutch prematurely. Float gears like Brian said. Less wear on the clutch, less time spent adjusting it, and less money replacing the clutch cause it worn out before it needed to be.
     
    devedo, Sep 18, 2019
    devedo, Sep 18, 2019
    #4
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