Results 1 to 6 of 6

Thread: 3-4 t/h upshift question

  1. #1
    Lifetime Member AdamRRT's Avatar
    Join Date
    Jun 2011
    Posts
    221

    Default 3-4 t/h upshift question

    I admit I hadn't been paying attention to the tuning lately cause I was pretty ok with how my truck is running. Also playing with some new toys (new AR-15, couple other guns). So looking at this trans tuning, I'm really excited. Tranny tuning is what has always sat EFI Live above HPTuners. They both did enough on fuel tuning, but EFI Live has always been heads above in the transmission tuning dept. And I'm glad to see we have the start of it now. Especially on this previously thought to be minimally electronic tranny. Pretty exciting.

    I'm wanting my T/H 3-4 upshift to take place closer to 56-57mph. But looking at the table, it makes no sense because it always shifts at the same spot, regardless of throttle position (when in T/H remember). So anybody able to dumb it down for me? Thanks!
    EFI Live, Maxxed Out auto trans, Edge TC, FASS, 35's, 4" lift, E.D. 62/68/12, 70 hp tips.

  2. #2
    Lifetime Member AdamRRT's Avatar
    Join Date
    Jun 2011
    Posts
    221

    Default

    Ok so looking closer, do we just go by the first shaft speed with a TP% above 0?
    EFI Live, Maxxed Out auto trans, Edge TC, FASS, 35's, 4" lift, E.D. 62/68/12, 70 hp tips.

  3. #3
    Member
    Join Date
    Jun 2011
    Posts
    68

    Default

    The first point where shaft speed and minimum throttle is met it will shift there. It took me a bit to understand it but im starting to get it better.
    06 CC DRW, DTT, EFI Live.

    473HP

  4. #4
    Lifetime Member AdamRRT's Avatar
    Join Date
    Jun 2011
    Posts
    221

    Default

    Gotcha. That's what I was thinking. Thanks man!
    So why the rest of the graph? For situations after-downshifting?
    EFI Live, Maxxed Out auto trans, Edge TC, FASS, 35's, 4" lift, E.D. 62/68/12, 70 hp tips.

  5. #5
    Member
    Join Date
    Jun 2011
    Posts
    68

    Default

    Think of it ike this, the graph can be looked at as two seperate areas. Above the line it wont shift, below it will, thats how I see it simplified.

    Looking at the stock table, at 30% throttle and 1900 shaft speed it will not shift. Hold that throttle to 2000 and now it will.

    I would think that the best way for you to get where you want would be to modify your shaft speed axis.
    06 CC DRW, DTT, EFI Live.

    473HP

  6. #6
    Lifetime Member GMPX's Avatar
    Join Date
    Apr 2003
    Posts
    13,148

    Default

    Quote Originally Posted by AdamRRT View Post
    Tranny tuning is what has always sat EFI Live above HPTuners.
    I assume you aren't talking about Cummins here right?
    I no longer monitor the forum, please either post your question or create a support ticket.

Similar Threads

  1. D2801 TCC lock during upshift
    By nevinsb in forum 4speed RWD/FWD Transmission Tuning (incl T42)
    Replies: 16
    Last Post: September 30th, 2010, 01:55 PM
  2. Upshift parameters Question
    By dbaxter_ss in forum 4speed RWD/FWD Transmission Tuning (incl T42)
    Replies: 3
    Last Post: November 6th, 2009, 07:30 PM
  3. T43 - Upshift TR OS 24243170
    By SBTuner in forum E37, E38 & E67 PFI ECM's
    Replies: 0
    Last Post: February 27th, 2008, 03:06 AM
  4. Can 4-3 downshift curve be at/below 2-3 upshift?
    By Mach2 in forum 4speed RWD/FWD Transmission Tuning (incl T42)
    Replies: 9
    Last Post: July 11th, 2007, 04:51 AM
  5. It won't upshift!!!!
    By Chevvy SS in forum 4speed RWD/FWD Transmission Tuning (incl T42)
    Replies: 7
    Last Post: November 20th, 2006, 11:36 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •