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Thread: NAG1/A580 Part Throttle Shift Scheduling Table Tuning

  1. #101
    Potential Tuner
    Join Date
    Aug 2021
    Posts
    4
    Any progress been made on this? I'm about to just order a TCM from OST dyno. Feel like I wasted my money on the tuner since fixing the hang in 3-4 and the way to quick downshift from 5th was the reason for buying it.

  2. #102
    Tuner in Training
    Join Date
    Feb 2019
    Posts
    15
    It has been 3 years.......

  3. #103
    Potential Tuner
    Join Date
    Feb 2023
    Posts
    3
    Quote Originally Posted by HaasExp View Post
    It's not perfect but this is how much i reduced the shift speeds to get the shifts to not hang as much between the 3-4 upshift under light/medium throttle conditions. Note that this is on a Rubicon Unlimited with 4.10's and 35's
    Attachment 111102

  4. #104
    Potential Tuner
    Join Date
    Feb 2023
    Posts
    3
    Could you help me with mine [email protected]

  5. #105
    Advanced Tuner
    Join Date
    Nov 2019
    Posts
    227
    Quote Originally Posted by InDEBTicon View Post
    Any progress been made on this? I'm about to just order a TCM from OST dyno. Feel like I wasted my money on the tuner since fixing the hang in 3-4 and the way to quick downshift from 5th was the reason for buying it.
    Did you end up ordering a TCM from OST and did it fix your shifting issues?

    Nothing really here to update. We've all found some issues but no real solutions as yet. Still missing some critical parameters to properly tweak these part throttle up and downshifts due to the speed offsets.

  6. #106
    Quote Originally Posted by HaasExp View Post
    Did you end up ordering a TCM from OST and did it fix your shifting issues?

    Nothing really here to update. We've all found some issues but no real solutions as yet. Still missing some critical parameters to properly tweak these part throttle up and downshifts due to the speed offsets.
    Hptuners does not have all mapping for these tcu's only about 25% of them. To change part throttle up-shift and downshift speeds, gear box learning values have to be changed using winols. What we do with mercedes side and uses same type of control area but different operating system and fixes the part throttle shifts that up-shift to soon into high gear at low speeds and have better downshifts.