My first time logging TC/Trans slip

Just wanted to check if I was experiencing any slip as I lost fluid from a cooling line on my last trip a month ago. Pan looked ok just a small patch on my magnet, super tight clutch pack clearances probably saved me is my guess as it was surely out of fluid before arriving to a gas station.

I am questioning the one part I have shared as possibly a slipping 3rd. But overall looks healthy/normal to me. I understand this math does not work in a gear ratio above 1.

Gen 3 can not log TCC slip, can a Gen 4?

There is no trans tune in your file.

Based on your data log your TCC clutches are toasty.

Attachment 137845

Here is the whole tune. Any other possible causes? Blocking the PWM valve in the valve body is ok without retuning right? Now to learn how you view it as such

Right, so you have no Lock up? How's your trans temps?
I'd turn off your lock up in the tune just so it looks right in the log.

Is this a 427 or 366ci engine? The file is named Ls7 but the displacement is showing 366.

My apologies for not sharing build info. It is my 08 Silvy 4x4 6.0 with an ls7 cam 210/230 .558 lift in./ex. almost ready to do another cam swap. Temps are mild it controls it around 170-180 with stock cooler.

My trans build was done by me and only with online info. I am open to any suggestions in tuning the PCM, TCM itself or any valve body mods you guys are firm believers in. Everything is stock in the trans. Borg Warner clutches, 5 pinion planets and corvette servo

My first build was about 2 years ago when I got the truck. Everything was fine until I replaced the engine this year doing it myself had an incident with one of the cooling lines reattaching to the block during removal. Still need to fix it but I'm stuck doing other things in life right now.

This should have been posted in the trans tuning section don't roast me. Would I need to change the TC DC maximum all to 100?

No point if you've got no tcc clutch.

No point if you've got no tcc clutch. You want raise the apply speeds. Just to be clear, this is only to tidy the log up.

Ok so change it for the log? Im confused the build still goes into lockup via another route from what I remember/understand? :secret:


I still don't think it works that way and I did mean the regulator valve. Blocking the valve eliminates the pwm, not the lockup feed from what I know. I'm pretty sure it locks up about 40mph, have not felt it in any other gear. I have rode the junk out of this converter for the last year with the valve blocked any performance of the trans hasn't changed besides the minor rpm rev on a 1-2 from cam swap and the need to learn and apply. Going to make me google the night away and pull out a valvebody diagram and draw some lines that do not exist :rant:

Out of my league sorry. Hopefully someone else will dive in.

Quote:

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Originally Posted by hjtrbo

Out of my league sorry. Hopefully someone else will dive in.

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I'm not afraid to be wrong if that is where I am headed just say I need to go back to 4L trans school and I will!

Temps are fine. Maintains 170-180 in 100 degree heat with a stock cooler

So I have been rebuilding these GM transmissions for a few years all together. I have to say that one of us had to have been confused maybe in what I said or what I actually meant.

https://www.youtube.com/watch?v=NjJogQnG1CE&t=4s

This is the blocking of the pwm valve procedure I speak of. Is this not a easy way to get rid of pwm? I know you can make notches in the solenoid to let it bypass. Installed an after market cooler in my truck a few months back temperature around 120 to 140 now