I've had that happen before. LOL Glad you found the issue. ;-)
Type: Posts; User: 1badc10
I've had that happen before. LOL Glad you found the issue. ;-)
Hmm... would be interesting to see.
Leave it alone & drive it. I see random blips while cruising 65-80mph, depending on throttle variations? sometimes with a little increase to the throttle to pass. Nothing detrimental on my end.
...
If what you?re doing is making adjustments for WOT scenarios, leave the WOT speed settings alone. As long as the vehicle exceeds the specified mph under WOT conditions, it should shift at the...
Not sure why yours jerks in Park position. I would not think that is a software / configuration issue. I?ve been making adjustments with several things relating to shift scheduling, timing, inertia,...
I dug up a 2020 Tahoe LT (5.3/A6) file, and it shows "8", even though shift tables are limited to "6" gears.
Gear Ratio
------------
1st - 4.0260
2nd - 2.3621
3rd - 1.5310
4th - 1.1520
5th -...
** edited **
Are you referring to TCC Desired Slip? If so... Transmission > Torque Converter > General > TCC Desired Slip
VCM Editor v5.0.4
Recently, I've been wondering. I've gotten used to remote starting my Yukon to get fluid flowing before shifting out of Park. Otherwise, seems to "lag" when engaging 1st gear (more like pump isn't...
If memory serves (~15 years ago), active diagnostics would limit transmission functionality. Aside from that, have you & your tuner tried manually activating things (special functions) using...
Having been in the position of acquiring standalone versions of ISTA (BMW software), to help maintain my X5. ISTA isn't complicated, but I wouldn't be opposed to HPT supporting BMW models.
Disable that DTC, write calibration, and try again. :shrug:
Trans type configured?
VSS location configured?
I have an 8L90 in my '15 Yukon Denali.
ECM trans type is "Auto"
ECM Auto trans type is "C2C"
VSS/OSS Location is "after gearbox"
Aside from...
Sounds like the OP wants to eliminate torque reduction completely. Wouldn't that be with just disabling "Switch A", in that same section?
Transmission > Torque Management > Torque Reduction >...
Assuming you're referring to the downshifts around the 3:15 mark, datalog your commanded shifts. Take note of the realtime mph during the downshift mph of concern. Once you know the mph of the...
Data log every transition you have concerns with. I?ve literally been doing this, making improvements one-by-one. Still can?t believe how badly GM dropped the ball on this. 🤷🏾*♂️
Glad you were able to get past that issue.
Looking back it an earlier reply, what do you mean ?modified mechanically?? Did you have FLT install a vacuum modulator? If so, that will certainly bypass any commanded shifting, relying on vacuum...
My guess would be one of the following:
1. ECM doesn?t detect/confirm WOT condition.
2. WOT shift RPM set lower than MPH
🤷🏾*♂️
Look for the TUTD areas. You may want to provide tune & log files. 😉
Any reason why your "WOT Shift Speed vs Shift - Normal" is set the way it is? Your Upshift speeds are the same values as your Downshift speeds. Set the downshift speeds lower than the upshift...
You reviving this one motivated me to test out shift timing adjustments for my '15 8L90. Since a local dealership flashed the TCM (Feb '19), I've experienced delayed (lazy) 1-2 shift @ WOT. This is...
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All except Corvette exhaust stuff. Wish I'd have NOT clicked the button to license that. Oh well... I paid the cost so no one else has to. LOL :-P
Noticed my '15 Yukon Denali does that. It's almost as if the fluid flows way too slow, with insufficient fluid pressure. I've just got in the habit of using remote start to get things flowing,...
Looking at your file, I'm curious as to why your WOT shift speed settings are high for the 1->2 and 2->3 shifts. If you changed the rear from 3.42 to 3.73, then you want to tune for that change. ...
Any plans to "make everything work", even if it costs additional credits? I've been hitting this brick wall for the past hour, trying to figure out what I've been doing wrong, but couldn't. Came to...