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  1. #1
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    Sep 2016
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    Removing Autoshift With HPT?

    Hey all, fairly new to posting but I've got a question I can't seem to figure an answer for through my googling.
    I'm looking to get rid of the auto upshift and downshift from my NAG1 using HPT.
    From what I understand, you can't disable that feature with HPT, it has to be Diablo.
    If that's the case, I seem to recall someone saying you could use a Diablo for just TCM tuning?
    Or is there any other options for getting that Autoshift feature off my TCM and continue to use HPT?

    Thanks for any input!

  2. #2
    Join Date
    Dec 2016
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    Charlotte NC
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    I just bought a MOPAR MTCM. The best $300 I have spent on the car in a long time. It does not have the auto upshift while in autostick and has the hold in gear feature.
    2005 Chrysler 300C 5.7 SBE, ported big valved heads, 784ac lifters, SRT 6.1 intake manifold, SRT shorties, custom grind Billy Drakeford cam, SLP LM1, MTCM and GETRAG 3.06 swap.

  3. #3
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    Quote Originally Posted by 4DoorMuscle View Post
    I just bought a MOPAR MTCM. The best $300 I have spent on the car in a long time. It does not have the auto upshift while in autostick and has the hold in gear feature.
    Ehh thanks for the info. I read up on that MTCM and that sounds like what I might just need to solve my auto-shift issue.
    I read somewhere that it'll throw your tranny into limp mode if you don't shift in time, is that true?
    Also, I'm guessing you use some sort of tuner on-top of the MTCM?
    Sorry for all the questions, I'm really intrigued abouts this MTCM route ������

  4. #4
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    Quote Originally Posted by KING1307 View Post
    Ehh thanks for the info. I read up on that MTCM and that sounds like what I might just need to solve my auto-shift issue.
    I read somewhere that it'll throw your tranny into limp mode if you don't shift in time, is that true?
    Also, I'm guessing you use some sort of tuner on-top of the MTCM?
    Sorry for all the questions, I'm really intrigued abouts this MTCM route ������
    No that is not correct. Your car will not go into limp mode with the MTCM. It comes with 6k WOT shift points. I have my engine rev limiter set at 6,300 or 6,500. In autostick if you run over the 6,000rpm before you shift it won't care unless you bump against the engine rev limiter, which I have done a few times. And NO do not put a TCM tune over the top of the MTCM or you will defeat the purpose of the MTCM to start with.
    2005 Chrysler 300C 5.7 SBE, ported big valved heads, 784ac lifters, SRT 6.1 intake manifold, SRT shorties, custom grind Billy Drakeford cam, SLP LM1, MTCM and GETRAG 3.06 swap.

  5. #5
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    Quote Originally Posted by 4DoorMuscle View Post
    No that is not correct. Your car will not go into limp mode with the MTCM. It comes with 6k WOT shift points. I have my engine rev limiter set at 6,300 or 6,500. In autostick if you run over the 6,000rpm before you shift it won't care unless you bump against the engine rev limiter, which I have done a few times. And NO do not put a TCM tune over the top of the MTCM or you will defeat the purpose of the MTCM to start with.
    Gotcha, thanks for the info, really appreciate it.
    A couple more things though, when you hit your engine rev limiter in autostick, what happens?
    Also, the only feature I want off this MTCM is the no Auto up-shift, I would have to retune for a 3.92 rear end as well, I'm assuming you can change certain parameters like shift points, shift firmness and differential gear ratios while maintaining the no Auto up-shift feature? ( Using HPT )

  6. #6
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    Quote Originally Posted by KING1307 View Post
    Gotcha, thanks for the info, really appreciate it.
    A couple more things though, when you hit your engine rev limiter in autostick, what happens?
    Also, the only feature I want off this MTCM is the no Auto up-shift, I would have to retune for a 3.92 rear end as well, I'm assuming you can change certain parameters like shift points, shift firmness and differential gear ratios while maintaining the no Auto up-shift feature? ( Using HPT )
    Hitting the rev limiter in auto stick is just that ....bouncing off the rev limiter. She's going to cut spark and fuel till you either let off the throttle or shift to the next gear. And yes you would need to change the gear ratio if needed. Pretty much the only reason I bought my MTCM was so I couple change the ratio when I did my GETRAG swap. FWIW I think the MTCM came set with a 3.92 ratio stock though I can't be for sure.
    2005 Chrysler 300C 5.7 SBE, ported big valved heads, 784ac lifters, SRT 6.1 intake manifold, SRT shorties, custom grind Billy Drakeford cam, SLP LM1, MTCM and GETRAG 3.06 swap.

  7. #7
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    Mar 2016
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    My HPTuners Auto shift Tables.

    2013 Dodge Charger R/T Plus 362.63HP/389.58TQ

  8. #8
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    Sep 2016
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    Quote Originally Posted by 4DoorMuscle View Post
    Hitting the rev limiter in auto stick is just that ....bouncing off the rev limiter. She's going to cut spark and fuel till you either let off the throttle or shift to the next gear. And yes you would need to change the gear ratio if needed. Pretty much the only reason I bought my MTCM was so I couple change the ratio when I did my GETRAG swap. FWIW I think the MTCM came set with a 3.92 ratio stock though I can't be for sure.
    Awesome, well sounds like I'll be getting a MTCM this winter. Thanks for all the info on that, appreciate it!
    Any idea on why Diablo has this feature and HP doesn't?
    Last edited by KING1307; 08-14-2019 at 01:46 AM.



  9. #9
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    Quote Originally Posted by KING1307 View Post
    Ehh thanks for the info. I read up on that MTCM and that sounds like what I might just need to solve my auto-shift issue.
    I read somewhere that it'll throw your tranny into limp mode if you don't shift in time, is that true?
    Also, I'm guessing you use some sort of tuner on-top of the MTCM?
    Sorry for all the questions, I'm really intrigued abouts this MTCM route ������
    If you go to high above what the tcm has set for an rpm limit, it will put your transmission into a safe mode. And you will get a code for engine over rpm limit.
    But if you haven't done heads or cam to where you need the extra rpm,then it should never happen to you. I found out the hard way about the safe mode.

    Sent from my SM-N960U using Tapatalk
    2007 R/T, long tubes, off road mids, borla atak exhaust. Inertia cnc big valve heads, inertia raging trojan cam, D1SC procharger 6.1 srt aluminum intake, mopar performance tcm, Trufiber Carbon Fiber SRT8 hood.

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