SHIFTING PROBLEM!!

Discussion in 'Dodge Charger SRT 392' started by ufoldfirst, Jun 20, 2015.

  1. ufoldfirst

    ufoldfirst Hellcat Member

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    1400 miles on my 2015 Charger 392, last week started having problem with paddle shifting...

    I like to use manual shifting quite often, mostly to slow down a little rather than extra braking and brake dust.

    Lately, I noticed the transmission took a while to catch up when leaving a stop sign or going around a turn at low speeds. As a Chrysler certified auto technician decades ago, I've only experienced that kind of symptoms with low transmission fluids. That shouldn't have anything to do with the electronic shifting...
    Now what really bothers me is about 40% of the time when UPSHIFTING using the right/+ paddle shifter, the transmission will DOWNSHIFT!
    This is happening at low speeds or cruising speeds. It doesn't matter what drive mode it's in, light throttle or medium, just starting to piss me off now. Driving in residential areas, I-5 and I-84 in Portland yesterday, etc... shifting from 2nd to 3rd and it goes to 1st! ARRRGGGH!!!

    Has anybody experienced this or read about it? I did a search in this forum and haven't seen anything. It is very frustrating, and annoying when driving through my neighborhood especially.
    I wanted to get some feedback from car owners like you before I grind into FCA and my dealer(who by the way I won't let even touch my oil filter).

    Thanks!
     
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  2. Misterdhdt

    Misterdhdt Gold Member

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    2300 miles on mine and lots old spirited runs and like you use the paddle shifters quite a bit. I haven't had any issues you described above. Think you are in need of trip to dealer to have it inspected. But I would keep an eye on the radiator. Mine and friend have both had ours replaced due to leaking on the passenger side
     
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  3. B5 Blue

    B5 Blue Platinum Member

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    Time for paddles
     
  4. SRT_HC_707

    SRT_HC_707 SRT_HC_707 Staff Member

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    At least one other person had the issue with up-shifting via paddle causing a downshift...

    Tagging fnkychkn he may have some helpful input....
     
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  5. SRT_HC_707

    SRT_HC_707 SRT_HC_707 Staff Member

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  6. B5 Blue

    B5 Blue Platinum Member

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    More than one. Good thing I'm ancient and use the shifter right HellcatdotClub :D:D:p
     
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  7. DocOz

    DocOz Rookie

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    Quit "requesting" a shift from your A8. Just trade it in for an M6.
     
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  8. fnkychkn

    fnkychkn swollen member Gold Supporting Member

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    the wiring diagram seems to contradict the operation description. i'll have to look into that.
    since the request signal is bussed from the left steering wheel EVIC switch module all the way to the radio, you can pretty much eliminate those circuits as possible causes. don't have access to paddle/radio switch resistance specs but i would concentrate my efforts in testing the hardwired circuits inside the steering wheel between the paddle/radio switches and the EVIC switch and/or SCCM (steering column control module). any excessive resistance in these circuits will affect voltage drop detected by the module. we have been having issues with steering wheel mounted switch circuits for a couple of years. mostly from poor connections.




    from FSM:

    WITH PADDLE SHIFT

    REMOTE RADIO SWITCHES

    The remote radio switches on the backs of both horizontal steering wheel spokes are normally open, resistor multiplexed momentary switches that are hard wired to the left steering wheel switch module (electronic vehicle information center switch). The left steering wheel switch module contains a microcontroller and is a Local Interface Network (LIN) data bus slave node. The left steering wheel switch microcontroller provides a shared five volt signal and monitors shared returns from both remote radio switches. The left steering wheel switch microcontroller senses the status of the remote radio switches by reading the voltage drop on the signal circuit.

    When the left steering wheel switch microcontroller senses an input (voltage drop) from any one of the remote radio switches, it communicates the switch status message via the LIN bus and through the clockspring and Steering Column Control Module (SCCM) microcontroller, which is a gateway to the Controller Area Network (CAN) data bus. The CAN bus then broadcasts switch status information over the CAN bus to the audio system. The electronic circuitry within the audio system is programmed to respond to these remote radio switch status messages by adjusting the audio settings as requested.

    PADDLE SHIFT SWITCHES

    The paddle shift switches in the two remote radio switch units are normally open, resistor multiplexed momentary switches that are hard wired to the left steering wheel switch module (electronic vehicle information center switch). The left steering wheel switch module contains a microcontroller and is a Local Interface Network (LIN) data bus slave node. The left steering wheel switch microcontroller provides a shared five volt signal and monitors shared returns from both paddle shift switches. The left steering wheel switch microcontroller senses the status of the paddle shift switches by reading the voltage drop on the signal circuit.

    When the left steering wheel switch microcontroller senses an input (voltage drop) from either of the paddle shift switches, it communicates the switch status message via the LIN bus and through the clockspring and Steering Column Control Module (SCCM) microcontroller, which is a gateway to the Controller Area Network (CAN) data bus. The CAN bus then broadcasts switch status information to the Transmission Control Module (TCM) communicating driver request for transmission upshift or downshift.

    The hard wired circuits between the remote radio switches or the paddle shift switches and the left steering wheel switch may be diagnosed using conventional diagnostic tools and procedures. Refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and connector repair procedures, details of wire harness routing and retention, connector pin out information and location views for the various wire harness connectors, splices and grounds.

    However, conventional diagnostic methods will not prove conclusive in the diagnosis of the remote radio switches, the paddle shift switches or the electronic communication between modules that provide the features of the remote radio switches and paddle shift switches. The most reliable, efficient and accurate means to diagnose the remote radio switches, the paddle shift switches or the electronic communication related to remote radio switch and paddle shift switch operation requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information.




    [​IMG]
     
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  9. Carnage

    Carnage SRT Hellcat Supercharged Moderator Staff Member Hellcat Car Club Gold Supporting Member HCC Charter Member

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    Yep you are so ancient bro LOL
     
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  10. B5 Blue

    B5 Blue Platinum Member

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    Unlike LOL
     
  11. B5 Blue

    B5 Blue Platinum Member

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    I agree and would think T830 pin 1 or 501 splice or steering module itself. Didn't you tell me harness is separate from paddles to steering module? That's what I have in my notes.
     
  12. fnkychkn

    fnkychkn swollen member Gold Supporting Member

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    harness is separate from the switches and the module but may not be serviced separately from the steering wheel.
     
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  13. rw99

    rw99 Silver Member

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    Not looking forward to the amount of driving a service writer is going to need to do in order to simply reproduce a single mis-shift. And then what will they do??? What's the next "swap-able" component that could solve this issue, now that we know the paddle switches swap doesn't fix it?

    Rich
     
  14. "Charlene"

    "Charlene" Rookie

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    I've got a 2015 Scat Pack A8. I have noticed that at very slow speeds in 2nd gear only and when it's revving just under 2k and I go to upshift with the paddle, it'll downshift back to 1st. I have noticed that if the RPM needle is above 2000 RPM it'll upshift just fine. Very weird issue.
     
  15. rw99

    rw99 Silver Member

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    Thanks for posting; it's good to know that this fault is not limited to the Hellcat A8.

    Sucks, though.


    Rich
     

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