NGC4 TCMs not following shift tables

[VPP1776]

Ok, maybe I am crazy, but I keep running into an issue where any TCM I flash with beta won't follow the 5-6 and 6-5 shift tables I build... Like for instance, 5-6 is supposed to happen at 2208 OSS rpm at 32.5% TPS. But when I drive the truck and log things it wants to make that shift at 3100 OSS rpm at 30-32% TPS reading. It also refuses to down shift on the programmed schedule and wants to hang on to 6th till the bitter end. Which is not helpful with trucks like the one I am fighting right now with an S472 hanging on the manifold.

I have flashed back with the most recent stable software on all of them that I have ran into this issue and it hasn't helped. Should I do a segment swap from one of my earlier reads with the stable software on TCMs with the same OS?

[[email protected]]

I've been running into the same issue. If you find the answer to it, would you mind posting it up? One thing I noticed is that it won't shift into 6th until 5th lock up occurs. No matter what I do to 5th lockup though, it won't lock the torque converter sooner. I'm not sure if that has anything to do with it, but you might try playing with 5th lock up with the previous stable versions. If it works, let me know please.

[VPP1776]

I've been running into the same issue. If you find the answer to it, would you mind posting it up? One thing I noticed is that it won't shift into 6th until 5th lock up occurs. No matter what I do to 5th lockup though, it won't lock the torque converter sooner. I'm not sure if that has anything to do with it, but you might try playing with 5th lock up with the previous stable versions. If it works, let me know please.

I found some overlaps on my 5-6 and 6-5 that made a big difference. Helped get it to stay locked too. I also had to back my WOT shift points down so it would shift right in tow haul with a load. That and I loaded the newest Beta version and I haven't seen the issues since. Post up your current file, I'll see if I can spot what is going on now that I have a better idea what I was doing wrong.

[[email protected]]

SELECTABLE SHIFT CALCULATOR.xlsx
68rfe V1.7_ tcc thresholds adjusted.hpt

Here is the last file I uploaded before I got deployed. It may be pretty wild in there because I was trying everything to get it to shift earlier into 6th.

I also created an excel file along time ago that I have been making updates to when I get time. I haven't added the torque converter plots yet. Maybe I'll have some time out here to finish it up. This file allows you to select what gear/s you want to show on the graph(can have all or none), and whether or not to show the shift points to based on throttle %. I have both throttle degree and % logged on there because I haven't been able to pinpoint exactly which one it shifts based off of...

I saw someone else on here the other day had a really cool program that did a similar thing but was much more interactive. You could change the shift points directly on the graph.