Page 2 of 2 FirstFirst 12
Results 21 to 31 of 31

Thread: need help with jtec trans tuning

  1. #21
    Tuner in Training
    Join Date
    Dec 2019
    Location
    va
    Posts
    36
    btw from what you may release zeroing t.m. in trans section gains me anything?? thats the one arera i havent changed (wasnt on my trial and error list of things to change)
    16 mkx
    09 mb 320 coupe
    02 dodge dakota r/t 5.9
    which is my latest toy to tune

  2. #22
    Senior Tuner Jim P's Avatar
    Join Date
    Jan 2018
    Location
    Everywhere
    Posts
    1,093
    Does your 46RE have a cabled TTVA or servo driven TTVA? The 48RE was cabled off the accelerator pedal until 2005. If it?s cabled you mainly have what you need there to change firmness, just play with the governor pressure table and tension of the TTVA cable to get your desired results. I could look and see if there is 3-4 and 4-3 shift tables and give an .xdf of those, I?m sure it has those in there. Manipulation of those along with post shift acceleration and the boundary shift windows in addition to adjustments to the TTVA will facilitate shift point changes.

  3. #23
    Tuner in Training
    Join Date
    Dec 2019
    Location
    va
    Posts
    36
    ok thanks i will give it a shot. i assume ttva is throttle kick down, if so than yes cable driven
    16 mkx
    09 mb 320 coupe
    02 dodge dakota r/t 5.9
    which is my latest toy to tune

  4. #24
    Senior Tuner Jim P's Avatar
    Join Date
    Jan 2018
    Location
    Everywhere
    Posts
    1,093
    It?s more than just a kickdown cable, it also regulates he rest of the gears shifting. But it?s a fine balancing act between governor pressure vs output shaft speed rpm and governor pressure vs transmission throttle valve angle to regulate shift firmness and when shifting will occur.

  5. #25
    Senior Tuner Jim P's Avatar
    Join Date
    Jan 2018
    Location
    Everywhere
    Posts
    1,093
    https://shop.ukrtrans.biz/wp-content...alogs/46RE.pdf

    This will give some insight to the 46/47/48RE transmissions but this also is more referenced to the ones with the electronic TTVA.

  6. #26
    Tuner in Training
    Join Date
    Dec 2019
    Location
    va
    Posts
    36
    ok will read adjusted gov. pressures by 5psi all of them ,,seem to bind or better yet feels inbetween gear ...thinking i should not do the top 2 since i notice it when from a stop pulling off
    16 mkx
    09 mb 320 coupe
    02 dodge dakota r/t 5.9
    which is my latest toy to tune

  7. #27
    Tuner in Training
    Join Date
    Dec 2019
    Location
    va
    Posts
    36
    ok that was a good read. I guess there should be 0 pressure in top two column other wise it will give me exactly what i felt putting 5psi in both columns causing that 2/3 gear feel taking off. is that your interpretation??also i was conservative ,is 5psi some thing i would notice?given this is my trial and error method??
    16 mkx
    09 mb 320 coupe
    02 dodge dakota r/t 5.9
    which is my latest toy to tune

  8. #28
    Tuner in Training
    Join Date
    Dec 2019
    Location
    va
    Posts
    36
    the above post is based on from what i read a condition that might occur if pressure was seen with zero mph
    16 mkx
    09 mb 320 coupe
    02 dodge dakota r/t 5.9
    which is my latest toy to tune

  9. #29
    Senior Tuner Jim P's Avatar
    Join Date
    Jan 2018
    Location
    Everywhere
    Posts
    1,093
    Yes you don?t want governor pressure at zero speed

  10. #30
    Tuner in Training
    Join Date
    Dec 2019
    Location
    va
    Posts
    36
    is 10psi noticeable?? thanks again for your help
    16 mkx
    09 mb 320 coupe
    02 dodge dakota r/t 5.9
    which is my latest toy to tune

  11. #31
    Senior Tuner Jim P's Avatar
    Join Date
    Jan 2018
    Location
    Everywhere
    Posts
    1,093
    I would think it would be.